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<!DOCTYPE html><html lang="zh-CN"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=2"><meta name="theme-color" content="#222"><meta http-equiv="X-UA-COMPATIBLE" content="IE=edge,chrome=1"><meta name="renderer" content="webkit"><link rel="icon" type="image/ico" sizes="32x32" href="/assets/favicon.ico"><link rel="apple-touch-icon" sizes="180x180" href="/assets/apple-touch-icon.png"><link rel="alternate" href="/rss.xml" title="Jiankychen's Blog" type="application/rss+xml"><link rel="alternate" href="/atom.xml" title="Jiankychen's Blog" type="application/atom+xml"><link rel="alternate" type="application/json" title="Jiankychen's Blog" href="https://jiankychen.github.io/feed.json"><link rel="preconnect" href="https://lf9-cdn-tos.bytecdntp.com"><link rel="preconnect" href="https://at.alicdn.com"><link rel="stylesheet" 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itemtype="http://schema.org/WebPage"><div id="loading"><div class="cat"><div class="body"></div><div class="head"><div class="face"></div></div><div class="foot"><div class="tummy-end"></div><div class="bottom"></div><div class="legs left"></div><div class="legs right"></div></div><div class="paw"><div class="hands left"></div><div class="hands right"></div></div></div></div><div id="container"><header id="header" itemscope="" itemtype="http://schema.org/WPHeader"><div class="inner"><div id="brand"><div class="pjax"><h1 itemprop="name headline">常见输入输出</h1><div class="meta"><span class="item" title="创建时间：2022-09-09 17:08:49"><span class="icon"><i class="ic i-calendar"></i></span><span class="text">发表于</span><time itemprop="dateCreated datePublished" datetime="2022-09-09T17:08:49+08:00">2022-09-09</time></span><span class="item" title="本文字数"><span class="icon"><i class="ic i-pen"></i></span><span class="text">本文字数</span><span>8.1k</span><span class="text">字</span></span><span 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itemprop="publisher" itemscope="itemscope" itemtype="http://schema.org/Organization"><meta itemprop="name" content="Jiankychen's Blog"></span><div class="body md" itemprop="articleBody"><h2 id="场景一多组空格分隔的两个正整数"><a class="anchor" href="#场景一多组空格分隔的两个正整数">#</a> 场景一：多组空格分隔的两个正整数</h2>
<p>输入描述：</p>
<pre><code>输入包括两个正整数 a, b (1 <= a, b <= 1000)，输入数据包括多组
</code></pre>
<p>输出描述：</p>
<pre><code>输出 a + b 的结果
</code></pre>
<p>数据范围：</p>
<pre><code>数据组数 1 <= t <= 100
</code></pre>
<p>输入示例：</p>
<pre><code>1 5
10 20
</code></pre>
<p>输出示例：</p>
<pre><code>6
30
</code></pre>
<p>代码实现：</p>
<figure class="highlight cpp"><figcaption data-lang="C++"></figcaption><table><tbody><tr><td data-num="1"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><iostream></span></span></pre></td></tr><tr><td data-num="2"></td><td><pre><span class="token keyword">using</span> <span class="token keyword">namespace</span> std<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="3"></td><td><pre></pre></td></tr><tr><td data-num="4"></td><td><pre><span class="token keyword">int</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="5"></td><td><pre> <span class="token keyword">int</span> a <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">,</span> b <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="6"></td><td><pre> <span class="token keyword">while</span> <span class="token punctuation">(</span>cin <span class="token operator">>></span> a <span class="token operator">>></span> b<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="7"></td><td><pre> cout <span class="token operator"><<</span> a <span class="token operator">+</span> b <span class="token operator"><<</span> endl<span class="token punctuation">;</span> <span class="token comment">// 64 位输出请用 printf ("% lld")</span></pre></td></tr><tr><td data-num="8"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="9"></td><td><pre> <span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="10"></td><td><pre><span class="token punctuation">}</span></pre></td></tr></tbody></table></figure><h2 id="场景二第一行组数接空格分隔的两个正整数"><a class="anchor" href="#场景二第一行组数接空格分隔的两个正整数">#</a> 场景二：第一行组数接空格分隔的两个正整数</h2>
<p>输入描述：</p>
<pre><code>输入第一行包括一个数据组数 t (1 <= t <= 100)
接下来每行包括两个正整数 a, b (1 <= a, b <= 1000)
</code></pre>
<p>输出描述：</p>
<pre><code>输出 a + b 的结果
</code></pre>
<p>数据范围：</p>
<pre><code>数据组数 1 <= t <= 100
</code></pre>
<p>输入示例：</p>
<pre><code>2
1 5
10 20
</code></pre>
<p>输出示例：</p>
<pre><code>6
30
</code></pre>
<p>代码实现：</p>
<figure class="highlight cpp"><figcaption data-lang="C++"></figcaption><table><tbody><tr><td data-num="1"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><iostream></span></span></pre></td></tr><tr><td data-num="2"></td><td><pre><span class="token keyword">using</span> <span class="token keyword">namespace</span> std<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="3"></td><td><pre></pre></td></tr><tr><td data-num="4"></td><td><pre><span class="token keyword">int</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="5"></td><td><pre> <span class="token keyword">int</span> t <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="6"></td><td><pre> cin <span class="token operator">>></span> t<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="7"></td><td><pre> <span class="token keyword">int</span> a <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">,</span> b <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="8"></td><td><pre> <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator"><</span> t<span class="token punctuation">;</span> <span class="token operator">++</span>i<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="9"></td><td><pre> cin <span class="token operator">>></span> a <span class="token operator">>></span> b<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="10"></td><td><pre> cout <span class="token operator"><<</span> a <span class="token operator">+</span> b <span class="token operator"><<</span> endl<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="11"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="12"></td><td><pre><span class="token punctuation">}</span></pre></td></tr></tbody></table></figure><h2 id="场景三空格分隔的两个正整数-以-0-0-结束"><a class="anchor" href="#场景三空格分隔的两个正整数-以-0-0-结束">#</a> 场景三：空格分隔的两个正整数 以 0 0 结束</h2>
<p>输入描述：</p>
<pre><code>输入包括两个正整数 a, b (1 <= a, b <= 10^9)，输入数据有多组，如果输入为 0 0 则结束输入
</code></pre>
<p>输出描述：</p>
<pre><code>输出 a + b 的结果
</code></pre>
<p>数据范围：</p>
<pre><code>数据组数 1 <= t <= 100
</code></pre>
<p>输入示例：</p>
<pre><code>1 5
10 20
0 0
</code></pre>
<p>输出示例：</p>
<pre><code>6
30
</code></pre>
<p>代码实现：</p>
<figure class="highlight cpp"><figcaption data-lang="C++"></figcaption><table><tbody><tr><td data-num="1"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><iostream></span></span></pre></td></tr><tr><td data-num="2"></td><td><pre><span class="token keyword">using</span> <span class="token keyword">namespace</span> std<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="3"></td><td><pre></pre></td></tr><tr><td data-num="4"></td><td><pre><span class="token keyword">int</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="5"></td><td><pre> <span class="token keyword">int</span> a <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">,</span> b <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="6"></td><td><pre> <span class="token keyword">while</span> <span class="token punctuation">(</span>cin <span class="token operator">>></span> a <span class="token operator">>></span> b<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="7"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>a <span class="token operator">==</span> <span class="token number">0</span> <span class="token operator">&&</span> b <span class="token operator">==</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token keyword">break</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="8"></td><td><pre> cout <span class="token operator"><<</span> a <span class="token operator">+</span> b <span class="token operator"><<</span> endl<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="9"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="10"></td><td><pre> <span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="11"></td><td><pre><span class="token punctuation">}</span></pre></td></tr></tbody></table></figure><h2 id="场景四每行第一个为个数后带空格分割整数-以-0-结束"><a class="anchor" href="#场景四每行第一个为个数后带空格分割整数-以-0-结束">#</a> 场景四：每行第一个为个数后带空格分割整数 以 0 结束</h2>
<p>输入描述：</p>
<pre><code>输入数据有多组，每行表示一组输入数据
每行的第一个整数为整数的个数 n (1 <= n <= 100)
接下来 n 个正整数，即需要求和的每个正整数
</code></pre>
<p>输出描述：</p>
<pre><code>每组数据输出求和的结果
</code></pre>
<p>数据范围：</p>
<pre><code>数据组数 1 <= t <= 100
每组数据中整数个数满足 1 <= n <= 100
每组数据中的值满足 1 <= val <= 100
</code></pre>
<p>输入示例：</p>
<pre><code>4 1 2 3 4
5 1 2 3 4 5
</code></pre>
<p>输出示例：</p>
<pre><code>10
15
</code></pre>
<p>代码实现：</p>
<figure class="highlight cpp"><figcaption data-lang="C++"></figcaption><table><tbody><tr><td data-num="1"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><iostream></span></span></pre></td></tr><tr><td data-num="2"></td><td><pre><span class="token keyword">using</span> <span class="token keyword">namespace</span> std<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="3"></td><td><pre></pre></td></tr><tr><td data-num="4"></td><td><pre><span class="token keyword">int</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="5"></td><td><pre> <span class="token keyword">int</span> n <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="6"></td><td><pre> <span class="token keyword">while</span> <span class="token punctuation">(</span>cin <span class="token operator">>></span> n<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="7"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>n <span class="token operator">==</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token keyword">break</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="8"></td><td><pre> <span class="token keyword">int</span> sum <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="9"></td><td><pre> <span class="token keyword">int</span> num <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="10"></td><td><pre> <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator"><</span> n<span class="token punctuation">;</span> <span class="token operator">++</span>i<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="11"></td><td><pre> cin <span class="token operator">>></span> num<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="12"></td><td><pre> sum <span class="token operator">+=</span> num<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="13"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="14"></td><td><pre> cout <span class="token operator"><<</span> sum <span class="token operator"><<</span> endl<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="15"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="16"></td><td><pre> <span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="17"></td><td><pre><span class="token punctuation">}</span></pre></td></tr></tbody></table></figure><h2 id="场景五第一行组数接个数以及空格分隔的整数"><a class="anchor" href="#场景五第一行组数接个数以及空格分隔的整数">#</a> 场景五：第一行组数接个数以及空格分隔的整数</h2>
<p>输入描述：</p>
<pre><code>输入的第一行包括一个正整数 t (1 <= t <= 100)，表示数据组数
接下来 t 行，每行一组数据
每行的第一个整数为整数的个数 n (1 <= n <= 100)
接下来 n 个正整数，即需要求和的每个正整数
</code></pre>
<p>输出描述：</p>
<pre><code>每组数据输出求和的结果
</code></pre>
<p>数据范围：</p>
<pre><code>数据组数 1 <= t <= 100
每组数据中整数个数满足 1 <= n <= 100
每组数据中的值满足 1 <= val <= 100
</code></pre>
<p>输入示例：</p>
<pre><code>2
4 1 2 3 4
5 1 2 3 4 5
</code></pre>
<p>输出示例：</p>
<pre><code>10
15
</code></pre>
<p>代码实现：</p>
<figure class="highlight cpp"><figcaption data-lang="C++"></figcaption><table><tbody><tr><td data-num="1"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><iostream></span></span></pre></td></tr><tr><td data-num="2"></td><td><pre><span class="token keyword">using</span> <span class="token keyword">namespace</span> std<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="3"></td><td><pre></pre></td></tr><tr><td data-num="4"></td><td><pre><span class="token keyword">int</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="5"></td><td><pre> <span class="token keyword">int</span> t <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="6"></td><td><pre> cin <span class="token operator">>></span> t<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="7"></td><td><pre> <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator"><</span> t<span class="token punctuation">;</span> <span class="token operator">++</span>i<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="8"></td><td><pre> <span class="token keyword">int</span> n <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="9"></td><td><pre> cin <span class="token operator">>></span> n<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="10"></td><td><pre> <span class="token keyword">int</span> sum <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="11"></td><td><pre> <span class="token keyword">int</span> num <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="12"></td><td><pre> <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> j <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> j <span class="token operator"><</span> n<span class="token punctuation">;</span> <span class="token operator">++</span>j<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="13"></td><td><pre> cin <span class="token operator">>></span> num<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="14"></td><td><pre> sum <span class="token operator">+=</span> num<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="15"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="16"></td><td><pre> cout <span class="token operator"><<</span> sum <span class="token operator"><<</span> endl<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="17"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="18"></td><td><pre> <span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="19"></td><td><pre><span class="token punctuation">}</span></pre></td></tr></tbody></table></figure><h2 id="场景六多组未知数量的正整数"><a class="anchor" href="#场景六多组未知数量的正整数">#</a> 场景六：多组未知数量的正整数</h2>
<p>输入描述：</p>
<pre><code>输入数据有多组，每行表示一组输入数据
每行不定有 n 个整数，空格隔开 (1 <= n <= 100)
</code></pre>
<p>输出描述：</p>
<pre><code>每组数据输出求和的结果
</code></pre>
<p>输入示例：</p>
<pre><code>1 2 3
4 5
0 0 0 0 0
</code></pre>
<p>输出示例：</p>
<pre><code>6
9
0
</code></pre>
<p>代码实现：</p>
<figure class="highlight cpp"><figcaption data-lang="C++"></figcaption><table><tbody><tr><td data-num="1"></td><td><pre><span class="token comment">// 借助 stringstream，把每行数据输入到一个 string ，再转换成一个流</span></pre></td></tr><tr><td data-num="2"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><iostream></span></span></pre></td></tr><tr><td data-num="3"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><string></span></span></pre></td></tr><tr><td data-num="4"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><sstream></span></span></pre></td></tr><tr><td data-num="5"></td><td><pre><span class="token keyword">using</span> <span class="token keyword">namespace</span> std<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="6"></td><td><pre></pre></td></tr><tr><td data-num="7"></td><td><pre><span class="token keyword">int</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="8"></td><td><pre> string str<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="9"></td><td><pre> <span class="token keyword">while</span> <span class="token punctuation">(</span><span class="token function">getline</span><span class="token punctuation">(</span>cin<span class="token punctuation">,</span> str<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="10"></td><td><pre> stringstream <span class="token function">ss</span><span class="token punctuation">(</span>str<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 将字符串 str 拷贝至 stringstream 流</span></pre></td></tr><tr><td data-num="11"></td><td><pre> <span class="token keyword">int</span> sum <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="12"></td><td><pre> <span class="token keyword">int</span> num <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="13"></td><td><pre> <span class="token keyword">while</span> <span class="token punctuation">(</span>ss <span class="token operator">>></span> num<span class="token punctuation">)</span> sum <span class="token operator">+=</span> num<span class="token punctuation">;</span> <span class="token comment">// 等效于 while (getline (ss, t, ' ')) sum += stoi (t);</span></pre></td></tr><tr><td data-num="14"></td><td><pre> cout <span class="token operator"><<</span> sum <span class="token operator"><<</span> endl<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="15"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="16"></td><td><pre> <span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="17"></td><td><pre><span class="token punctuation">}</span></pre></td></tr></tbody></table></figure><p>其中， <code>getline (istream& is, string& str, char delim)</code> ：（参考：<a target="_blank" rel="noopener" href="https://cplusplus.com/reference/string/string/getline/">std::getline</a> ）</p>
<ul>
<li>Extracts characters from <code>is</code> and stores them into <code>str</code> until the delimitation character <code>delim</code> is found.</li>
<li>If the delimiter is found, it is extracted and discarded (i.e. it is not stored and the next input operation will begin after it).</li>
<li>Note that any content in <code>str</code> before the call is replaced by the newly extracted sequence.</li>
</ul>
<blockquote>
<p><code>getline (istream& is, string& str)</code> ：Extracts characters from <code>is</code> and stores them into <code>str</code> until the newline character, <code>'\n'</code> , is found.</p>
</blockquote>
<blockquote>
<p>注意：如果在使用 <code>getline()</code> 函数之前已经使用过 <code>cin</code> ，则需使用 <code>cin.get()</code> （或者， <code>cin.ignore()</code> 或 <code>getchar()</code> ）读取缓冲区中的换行符 <code>\n</code> ，然后再使用 <code>getline()</code> （参考：<a target="_blank" rel="noopener" href="https://blog.csdn.net/weixin_43646672/article/details/104675523?spm=1001.2101.3001.6650.8&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7EOPENSEARCH%7ERate-8-104675523-blog-119514017.pc_relevant_multi_platform_featuressortv2dupreplace&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7EOPENSEARCH%7ERate-8-104675523-blog-119514017.pc_relevant_multi_platform_featuressortv2dupreplace&utm_relevant_index=8">C++ 中 cin 和 getline 使用出错的解决方法</a> ）</p>
<ul>
<li><code>cin.get()</code> ：可以读入包括空格，跳格，回车符在内的空白字符</li>
<li><code>cin.ignore()</code> ：丢弃输入的第一个字符。用来防止接收上次输入的回车符</li>
<li><code>getchar()</code> ：读取一个字符，包括回车，空格</li>
</ul>
</blockquote>
<p>或者：</p>
<figure class="highlight cpp"><figcaption data-lang="C++"></figcaption><table><tbody><tr><td data-num="1"></td><td><pre><span class="token comment">// 每次 cin >> 时判断下一位是不是换行符，即 cin.get () == '\n'</span></pre></td></tr><tr><td data-num="2"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><iostream></span></span></pre></td></tr><tr><td data-num="3"></td><td><pre><span class="token keyword">using</span> <span class="token keyword">namespace</span> std<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="4"></td><td><pre></pre></td></tr><tr><td data-num="5"></td><td><pre><span class="token keyword">int</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="6"></td><td><pre> <span class="token keyword">int</span> sum <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="7"></td><td><pre> <span class="token keyword">int</span> num <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="8"></td><td><pre> <span class="token keyword">while</span> <span class="token punctuation">(</span>cin <span class="token operator">>></span> num<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="9"></td><td><pre> sum <span class="token operator">+=</span> num<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="10"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>cin<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">==</span> <span class="token char">'\n'</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="11"></td><td><pre> cout <span class="token operator"><<</span> sum <span class="token operator"><<</span> endl<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="12"></td><td><pre> sum <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="13"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="14"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="15"></td><td><pre> <span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="16"></td><td><pre><span class="token punctuation">}</span></pre></td></tr></tbody></table></figure><h2 id="场景七一行多个空格分隔的字符串"><a class="anchor" href="#场景七一行多个空格分隔的字符串">#</a> 场景七：一行多个空格分隔的字符串</h2>
<p>输入描述：</p>
<pre><code>输入有两行，第一行 n
第二行是 n 个字符串，字符串之间用空格隔开
</code></pre>
<p>输出描述：</p>
<pre><code>输出一行排序后的字符串，空格隔开，无结尾空格
</code></pre>
<p>输入示例：</p>
<pre><code>5
c d a bb e
</code></pre>
<p>输出示例：</p>
<pre><code>a bb c d e
</code></pre>
<p>代码实现：</p>
<figure class="highlight cpp"><figcaption data-lang="C++"></figcaption><table><tbody><tr><td data-num="1"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><iostream></span></span></pre></td></tr><tr><td data-num="2"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><string></span></span></pre></td></tr><tr><td data-num="3"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><vector></span></span></pre></td></tr><tr><td data-num="4"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><algorithm></span></span></pre></td></tr><tr><td data-num="5"></td><td><pre><span class="token keyword">using</span> <span class="token keyword">namespace</span> std<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="6"></td><td><pre></pre></td></tr><tr><td data-num="7"></td><td><pre><span class="token keyword">int</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="8"></td><td><pre> <span class="token keyword">int</span> n <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="9"></td><td><pre> cin <span class="token operator">>></span> n<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="10"></td><td><pre> vector<span class="token operator"><</span>string<span class="token operator">></span> <span class="token function">words</span><span class="token punctuation">(</span>n<span class="token punctuation">,</span> <span class="token string">""</span><span class="token punctuation">)</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="11"></td><td><pre> <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator"><</span> n<span class="token punctuation">;</span> <span class="token operator">++</span>i<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="12"></td><td><pre> cin <span class="token operator">>></span> words<span class="token punctuation">[</span>i<span class="token punctuation">]</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="13"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="14"></td><td><pre> <span class="token function">sort</span><span class="token punctuation">(</span>words<span class="token punctuation">.</span><span class="token function">begin</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> words<span class="token punctuation">.</span><span class="token function">end</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="15"></td><td><pre> <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator"><</span> n <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">;</span> <span class="token operator">++</span>i<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="16"></td><td><pre> cout <span class="token operator"><<</span> words<span class="token punctuation">[</span>i<span class="token punctuation">]</span> <span class="token operator"><<</span> <span class="token string">" "</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="17"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="18"></td><td><pre> cout <span class="token operator"><<</span> words<span class="token punctuation">[</span>n <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">]</span> <span class="token operator"><<</span> endl<span class="token punctuation">;</span> <span class="token comment">// 无结尾空格</span></pre></td></tr><tr><td data-num="19"></td><td><pre> <span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="20"></td><td><pre><span class="token punctuation">}</span></pre></td></tr></tbody></table></figure><h2 id="场景八多行空格分隔的字符串"><a class="anchor" href="#场景八多行空格分隔的字符串">#</a> 场景八：多行空格分隔的字符串</h2>
<p>输入描述：</p>
<pre><code>多个测试用例，每个测试用例一行
每行通过空格隔开，有 n 个字符，n < 100
</code></pre>
<p>输出描述：</p>
<pre><code>对于每组测试用例，输出一行排序过的字符串，每个字符串通过空格隔开
</code></pre>
<p>输入示例：</p>
<pre><code>a c bb
f dddd
nowcoder
</code></pre>
<p>输出示例：</p>
<pre><code>a bb c
dddd f
nowcoder
</code></pre>
<p>代码实现：</p>
<figure class="highlight cpp"><figcaption data-lang="C++"></figcaption><table><tbody><tr><td data-num="1"></td><td><pre><span class="token comment">// getline()</span></pre></td></tr><tr><td data-num="2"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><iostream></span></span></pre></td></tr><tr><td data-num="3"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><vector></span></span></pre></td></tr><tr><td data-num="4"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><string></span></span></pre></td></tr><tr><td data-num="5"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><sstream></span></span></pre></td></tr><tr><td data-num="6"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><algorithm></span></span></pre></td></tr><tr><td data-num="7"></td><td><pre><span class="token keyword">using</span> <span class="token keyword">namespace</span> std<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="8"></td><td><pre></pre></td></tr><tr><td data-num="9"></td><td><pre><span class="token keyword">int</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="10"></td><td><pre> string str1<span class="token punctuation">,</span> str2<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="11"></td><td><pre> vector<span class="token operator"><</span>string<span class="token operator">></span> words<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="12"></td><td><pre> <span class="token keyword">while</span> <span class="token punctuation">(</span><span class="token function">getline</span><span class="token punctuation">(</span>cin<span class="token punctuation">,</span> str1<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="13"></td><td><pre> stringstream <span class="token function">ss</span><span class="token punctuation">(</span>str1<span class="token punctuation">)</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="14"></td><td><pre> <span class="token keyword">while</span> <span class="token punctuation">(</span><span class="token function">getline</span><span class="token punctuation">(</span>ss<span class="token punctuation">,</span> str2<span class="token punctuation">,</span> <span class="token char">' '</span><span class="token punctuation">)</span><span class="token punctuation">)</span> words<span class="token punctuation">.</span><span class="token function">push_back</span><span class="token punctuation">(</span>str2<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 等效于 while (ss>> str2) words.push_back (str2);</span></pre></td></tr><tr><td data-num="15"></td><td><pre> <span class="token function">sort</span><span class="token punctuation">(</span>words<span class="token punctuation">.</span><span class="token function">begin</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> words<span class="token punctuation">.</span><span class="token function">end</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="16"></td><td><pre> <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator"><</span> words<span class="token punctuation">.</span><span class="token function">size</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">;</span> <span class="token operator">++</span>i<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="17"></td><td><pre> cout <span class="token operator"><<</span> words<span class="token punctuation">[</span>i<span class="token punctuation">]</span> <span class="token operator"><<</span> <span class="token string">" "</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="18"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="19"></td><td><pre> cout <span class="token operator"><<</span> words<span class="token punctuation">[</span>words<span class="token punctuation">.</span><span class="token function">size</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">]</span> <span class="token operator"><<</span> endl<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="20"></td><td><pre> words<span class="token punctuation">.</span><span class="token function">clear</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 清空 words 数组</span></pre></td></tr><tr><td data-num="21"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="22"></td><td><pre> <span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="23"></td><td><pre><span class="token punctuation">}</span></pre></td></tr></tbody></table></figure><p>或者：</p>
<figure class="highlight cpp"><figcaption data-lang="C++"></figcaption><table><tbody><tr><td data-num="1"></td><td><pre><span class="token comment">// 判断换行符 cin.get () == '\n'</span></pre></td></tr><tr><td data-num="2"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><iostream></span></span></pre></td></tr><tr><td data-num="3"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><vector></span></span></pre></td></tr><tr><td data-num="4"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><string></span></span></pre></td></tr><tr><td data-num="5"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><algorithm></span></span></pre></td></tr><tr><td data-num="6"></td><td><pre><span class="token keyword">using</span> <span class="token keyword">namespace</span> std<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="7"></td><td><pre></pre></td></tr><tr><td data-num="8"></td><td><pre><span class="token keyword">int</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="9"></td><td><pre> string word<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="10"></td><td><pre> vector<span class="token operator"><</span>string<span class="token operator">></span> words<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="11"></td><td><pre> <span class="token keyword">while</span> <span class="token punctuation">(</span>cin <span class="token operator">>></span> word<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="12"></td><td><pre> words<span class="token punctuation">.</span><span class="token function">push_back</span><span class="token punctuation">(</span>word<span class="token punctuation">)</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="13"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>cin<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">==</span> <span class="token char">'\n'</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 等效于 if (getchar () == '\n')</span></pre></td></tr><tr><td data-num="14"></td><td><pre> <span class="token function">sort</span><span class="token punctuation">(</span>words<span class="token punctuation">.</span><span class="token function">begin</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> words<span class="token punctuation">.</span><span class="token function">end</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="15"></td><td><pre> <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator"><</span> words<span class="token punctuation">.</span><span class="token function">size</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">;</span> <span class="token operator">++</span>i<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="16"></td><td><pre> cout <span class="token operator"><<</span> words<span class="token punctuation">[</span>i<span class="token punctuation">]</span> <span class="token operator"><<</span> <span class="token string">" "</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="17"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="18"></td><td><pre> cout <span class="token operator"><<</span> words<span class="token punctuation">[</span>words<span class="token punctuation">.</span><span class="token function">size</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">]</span> <span class="token operator"><<</span> endl<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="19"></td><td><pre> words<span class="token punctuation">.</span><span class="token function">clear</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="20"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="21"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="22"></td><td><pre> <span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="23"></td><td><pre><span class="token punctuation">}</span></pre></td></tr></tbody></table></figure><h2 id="场景九多行逗号分隔的字符串"><a class="anchor" href="#场景九多行逗号分隔的字符串">#</a> 场景九：多行逗号分隔的字符串</h2>
<p>输入描述：</p>
<pre><code>多个测试用例，每个测试用例一行
每行通过 ',' 隔开，有 n 个字符，n < 100
</code></pre>
<p>输出描述：</p>
<pre><code>对于每组用例输出一行排序后的字符串，用 ',' 隔开，无结尾空格
</code></pre>
<p>输入示例：</p>
<pre><code>a,c,bb
f,dddd
nowcoder
</code></pre>
<p>输出示例：</p>
<pre><code>a,bb,c
dddd,f
nowcoder
</code></pre>
<p>代码实现：</p>
<figure class="highlight cpp"><figcaption data-lang="C++"></figcaption><table><tbody><tr><td data-num="1"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><iostream></span></span></pre></td></tr><tr><td data-num="2"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><string></span></span></pre></td></tr><tr><td data-num="3"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><vector></span></span></pre></td></tr><tr><td data-num="4"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><sstream></span></span></pre></td></tr><tr><td data-num="5"></td><td><pre><span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><algorithm></span></span></pre></td></tr><tr><td data-num="6"></td><td><pre><span class="token keyword">using</span> <span class="token keyword">namespace</span> std<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="7"></td><td><pre></pre></td></tr><tr><td data-num="8"></td><td><pre><span class="token keyword">int</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="9"></td><td><pre> string str1<span class="token punctuation">,</span> str2<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="10"></td><td><pre> vector<span class="token operator"><</span>string<span class="token operator">></span> words<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="11"></td><td><pre> <span class="token keyword">while</span> <span class="token punctuation">(</span><span class="token function">getline</span><span class="token punctuation">(</span>cin<span class="token punctuation">,</span> str1<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="12"></td><td><pre> stringstream <span class="token function">ss</span><span class="token punctuation">(</span>str1<span class="token punctuation">)</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="13"></td><td><pre> <span class="token keyword">while</span> <span class="token punctuation">(</span><span class="token function">getline</span><span class="token punctuation">(</span>ss<span class="token punctuation">,</span> str2<span class="token punctuation">,</span> <span class="token char">','</span><span class="token punctuation">)</span><span class="token punctuation">)</span> words<span class="token punctuation">.</span><span class="token function">push_back</span><span class="token punctuation">(</span>str2<span class="token punctuation">)</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="14"></td><td><pre> <span class="token function">sort</span><span class="token punctuation">(</span>words<span class="token punctuation">.</span><span class="token function">begin</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> words<span class="token punctuation">.</span><span class="token function">end</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="15"></td><td><pre> <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator"><</span> words<span class="token punctuation">.</span><span class="token function">size</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">;</span> <span class="token operator">++</span>i<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="16"></td><td><pre> cout <span class="token operator"><<</span> words<span class="token punctuation">[</span>i<span class="token punctuation">]</span> <span class="token operator"><<</span> <span class="token string">","</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="17"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="18"></td><td><pre> cout <span class="token operator"><<</span> words<span class="token punctuation">[</span>words<span class="token punctuation">.</span><span class="token function">size</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">]</span> <span class="token operator"><<</span> endl<span class="token punctuation">;</span></pre></td></tr><tr><td data-num="19"></td><td><pre> words<span class="token punctuation">.</span><span class="token function">clear</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="20"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="21"></td><td><pre> <span class="token keyword">return</span> <span class="token number">0</span><span class="token punctuation">;</span></pre></td></tr><tr><td data-num="22"></td><td><pre><span class="token punctuation">}</span></pre></td></tr></tbody></table></figure><p>参考：</p>
<ul>
<li><a target="_blank" rel="noopener" href="https://ac.nowcoder.com/acm/contest/5657#question">OJ 在线编程常见输入输出练习</a></li>
<li><a target="_blank" rel="noopener" href="https://blog.csdn.net/qq_39295220/article/details/116785551?utm_term=%E7%89%9B%E5%AE%A2%E7%BD%91%E6%80%8E%E4%B9%88%E6%8C%89acm%E6%A8%A1%E5%BC%8F%E7%BB%83%E9%A2%98&utm_medium=distribute.pc_aggpage_search_result.none-task-blog-2~all~sobaiduweb~default-1-116785551&spm=3001.4430.">ACM 模式输入输出案例总结</a></li>
</ul>
</div><footer><div class="meta"><span class="item"><span class="icon"><i class="ic i-calendar-check"></i></span><span class="text">更新于</span><time title="修改时间：2024-06-08 23:09:00" itemprop="dateModified" datetime="2024-06-08T23:09:00+08:00">2024-06-08</time></span></div><div id="copyright"><ul><li class="author"><strong>本文作者：</strong>Jiankychen<i class="ic i-at"><em>@</em></i>Jiankychen's Blog</li><li class="link"><strong>本文链接：</strong><a href="https://jiankychen.github.io/leetcode-input&output.html" title="常见输入输出">https://jiankychen.github.io/leetcode-input&output.html</a></li><li class="license"><strong>版权声明：</strong>本站所有文章除特别声明外，均采用 <a target="_blank" rel="noopener" href="https://creativecommons.org/licenses/by-nc-sa/4.0/deed.zh"><i class="ic i-creative-commons"><em>(CC)</em></i>BY-NC-SA</a> 许可协议。转载请注明出处！</li></ul></div></footer></article></div><div class="post-nav"><div class="item left"><a href="/latex-citation.html" rel="prev" itemprop="url" data-background-image="https://i.imgtg.com/2023/03/09/YS2LU.jpg" title="LaTeX：跨 tex 文件的交叉引用"><span class="type">上一篇</span><span class="category"><i class="ic i-flag"></i>LaTeX</span><h3>LaTeX：跨 tex 文件的交叉引用</h3></a></div><div class="item right"><a href="/cpp-statement.html" rel="next" itemprop="url" data-background-image="https://i.imgtg.com/2023/03/09/YSj7p.jpg" title="C++ 语句"><span class="type">下一篇</span><span class="category"><i class="ic i-flag"></i>C++</span><h3>C++ 语句</h3></a></div></div><div class="wrap" id="comments"></div></div><div id="sidebar"><div class="inner"><div class="panels"><div class="inner"><div class="contents panel pjax" data-title="文章目录"><ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#%E5%9C%BA%E6%99%AF%E4%B8%80%E5%A4%9A%E7%BB%84%E7%A9%BA%E6%A0%BC%E5%88%86%E9%9A%94%E7%9A%84%E4%B8%A4%E4%B8%AA%E6%AD%A3%E6%95%B4%E6%95%B0"><span class="toc-number">1.</span> <span class="toc-text"> 场景一：多组空格分隔的两个正整数</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E5%9C%BA%E6%99%AF%E4%BA%8C%E7%AC%AC%E4%B8%80%E8%A1%8C%E7%BB%84%E6%95%B0%E6%8E%A5%E7%A9%BA%E6%A0%BC%E5%88%86%E9%9A%94%E7%9A%84%E4%B8%A4%E4%B8%AA%E6%AD%A3%E6%95%B4%E6%95%B0"><span class="toc-number">2.</span> <span class="toc-text"> 场景二：第一行组数接空格分隔的两个正整数</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E5%9C%BA%E6%99%AF%E4%B8%89%E7%A9%BA%E6%A0%BC%E5%88%86%E9%9A%94%E7%9A%84%E4%B8%A4%E4%B8%AA%E6%AD%A3%E6%95%B4%E6%95%B0-%E4%BB%A5-0-0-%E7%BB%93%E6%9D%9F"><span class="toc-number">3.</span> <span class="toc-text"> 场景三：空格分隔的两个正整数 以 0 0 结束</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E5%9C%BA%E6%99%AF%E5%9B%9B%E6%AF%8F%E8%A1%8C%E7%AC%AC%E4%B8%80%E4%B8%AA%E4%B8%BA%E4%B8%AA%E6%95%B0%E5%90%8E%E5%B8%A6%E7%A9%BA%E6%A0%BC%E5%88%86%E5%89%B2%E6%95%B4%E6%95%B0-%E4%BB%A5-0-%E7%BB%93%E6%9D%9F"><span class="toc-number">4.</span> <span class="toc-text"> 场景四：每行第一个为个数后带空格分割整数 以 0 结束</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E5%9C%BA%E6%99%AF%E4%BA%94%E7%AC%AC%E4%B8%80%E8%A1%8C%E7%BB%84%E6%95%B0%E6%8E%A5%E4%B8%AA%E6%95%B0%E4%BB%A5%E5%8F%8A%E7%A9%BA%E6%A0%BC%E5%88%86%E9%9A%94%E7%9A%84%E6%95%B4%E6%95%B0"><span class="toc-number">5.</span> <span class="toc-text"> 场景五：第一行组数接个数以及空格分隔的整数</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E5%9C%BA%E6%99%AF%E5%85%AD%E5%A4%9A%E7%BB%84%E6%9C%AA%E7%9F%A5%E6%95%B0%E9%87%8F%E7%9A%84%E6%AD%A3%E6%95%B4%E6%95%B0"><span class="toc-number">6.</span> <span class="toc-text"> 场景六：多组未知数量的正整数</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E5%9C%BA%E6%99%AF%E4%B8%83%E4%B8%80%E8%A1%8C%E5%A4%9A%E4%B8%AA%E7%A9%BA%E6%A0%BC%E5%88%86%E9%9A%94%E7%9A%84%E5%AD%97%E7%AC%A6%E4%B8%B2"><span class="toc-number">7.</span> <span class="toc-text"> 场景七：一行多个空格分隔的字符串</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E5%9C%BA%E6%99%AF%E5%85%AB%E5%A4%9A%E8%A1%8C%E7%A9%BA%E6%A0%BC%E5%88%86%E9%9A%94%E7%9A%84%E5%AD%97%E7%AC%A6%E4%B8%B2"><span class="toc-number">8.</span> <span class="toc-text"> 场景八：多行空格分隔的字符串</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E5%9C%BA%E6%99%AF%E4%B9%9D%E5%A4%9A%E8%A1%8C%E9%80%97%E5%8F%B7%E5%88%86%E9%9A%94%E7%9A%84%E5%AD%97%E7%AC%A6%E4%B8%B2"><span class="toc-number">9.</span> <span class="toc-text"> 场景九：多行逗号分隔的字符串</span></a></li></ol></div><div class="related panel pjax" data-title="系列文章"><ul><li><a href="/leetcode-binarysearch.html" rel="bookmark" title="LeetCode - 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