add solution for 066 plus one

C++/066_Plus_One.cpp

@@ -0,0 +1,48 @@
+//66. Plus One
+/*
+ *Given a non-negative number represented as an array of digits, plus one to the number.
+ *
+ *The digits are stored such that the most significant digit is at the head of the list.
+ *
+ *Tag: Array, Math
+ *
+ *Author: Linsen Wu
+ */
+
+#include "stdafx.h"
+#include "iostream"
+#include <vector>
+#include <unordered_map>
+
+using namespace std;
+
+class Solution {
+public:
+    vector<int> plusOne(vector<int>& digits) {
+        int n = digits.size();
+		vector<int> result (digits.size(),0); 
+
+		int sum = 0;
+		int carry = 1;
+
+		for (int i = n - 1; i >=0; i--)
+		{
+			sum = carry + digits[i];
+			carry = sum/10;
+			result[i] = sum%10;
+		}
+
+		if (carry > 0)
+		{
+			result.insert(result.begin(), carry);
+		}
+
+		return result;
+    }
+};
+
+int _tmain(int argc, _TCHAR* argv[])
+{
+	return 0;
+}
+