|
1 |
| -import logo from './logo.svg'; |
2 |
| -import './App.css'; |
3 |
| -import { useState } from 'react'; |
| 1 | +import React, { useState } from "react"; |
| 2 | +import "./App.css"; |
4 | 3 |
|
5 |
| -function App() { |
6 |
| - const numbers= [1,2,3,4,5,6,7,8,9,0] |
7 |
| - const expressions = ['+', '-', '*', '%'] |
| 4 | +const App = () => { |
| 5 | + const [input, setInput] = useState(""); |
| 6 | + const [result, setResult] = useState(""); |
8 | 7 |
|
9 |
| - const [userInput, setUserInput] = useState('') |
10 |
| - const [result, setResult] = useState(null) |
11 |
| - const [submitClicked, setSubmitClicked] = useState(false) |
| 8 | + const handleButtonClick = (value) => { |
| 9 | + setInput((prev) => prev + value); |
| 10 | + }; |
12 | 11 |
|
13 |
| - const handleClick = (input) => { |
14 |
| - setUserInput(prevInput => prevInput + input.toString()); |
15 |
| - } |
16 |
| - console.log('userInput', userInput) |
| 12 | + const clearInput = () => { |
| 13 | + setInput(""); |
| 14 | + setResult(""); |
| 15 | + }; |
17 | 16 |
|
| 17 | + const calculateResult = () => { |
| 18 | + let num1 = ""; |
| 19 | + let num2 = ""; |
| 20 | + let operator = ""; |
18 | 21 |
|
19 |
| - const handleSubmit = () => { |
20 |
| - let value = eval(userInput) |
21 |
| - console.log('value', value) |
22 |
| - setResult(value) |
23 |
| - setSubmitClicked(true) |
24 |
| - } |
| 22 | + for (let i = 0; i < input.length; i++) { |
| 23 | + const char = input[i]; |
| 24 | + if (["+", "-", "*", "/"].includes(char)) { |
| 25 | + operator = char; |
| 26 | + } else if (!operator) { |
| 27 | + num1 += char; |
| 28 | + } else { |
| 29 | + num2 += char; |
| 30 | + } |
| 31 | + } |
25 | 32 |
|
26 |
| - const handleReset = () => { |
27 |
| - setResult(null) |
28 |
| - setSubmitClicked(false) |
29 |
| - setUserInput('') |
30 |
| - } |
| 33 | + num1 = parseFloat(num1); |
| 34 | + num2 = parseFloat(num2); |
31 | 35 |
|
32 |
| - return ( |
33 |
| - <div className="App"> |
34 |
| - <div className='user-input-and-calc'> |
35 |
| - {submitClicked ? result : userInput} |
36 |
| - </div> |
37 |
| - |
38 |
| - <div className='number-holder'> |
39 |
| - { |
40 |
| - numbers.map((item) => { |
41 |
| - return( |
42 |
| - <button onClick={() => handleClick(item)}>{item}</button> |
43 |
| - ) |
44 |
| - }) |
45 |
| - } |
46 |
| - </div> |
| 36 | + let calcResult = 0; |
| 37 | + if (operator === "+") calcResult = num1 + num2; |
| 38 | + if (operator === "-") calcResult = num1 - num2; |
| 39 | + if (operator === "*") calcResult = num1 * num2; |
| 40 | + if (operator === "/") calcResult = num2 !== 0 ? num1 / num2 : "Error"; |
| 41 | + setResult(""); |
47 | 42 |
|
48 |
| - <div className='expression-holder'> |
49 |
| - { |
50 |
| - expressions.map((item) => { |
51 |
| - return( |
52 |
| - <button onClick={() => handleClick(item)}>{item}</button> |
53 |
| - ) |
54 |
| - }) |
55 |
| - } |
56 |
| - </div> |
57 |
| - |
58 |
| - <button onClick={() => handleSubmit()}>Submit</button> |
59 |
| - <button onClick={() => handleReset()}>Reset</button> |
| 43 | + setResult(calcResult); |
| 44 | + }; |
60 | 45 |
|
| 46 | + return ( |
| 47 | + <div className="calculator-container"> |
| 48 | + <input |
| 49 | + type="text" |
| 50 | + value={input} |
| 51 | + readOnly |
| 52 | + className="calculator-input" |
| 53 | + /> |
| 54 | + <div className="result">Result: {result}</div> |
| 55 | + <div className="buttons-container"> |
| 56 | + {[1, 2, 3, "+", 4, 5, 6, "-", 7, 8, 9, "*", 0, "/", "C", "="].map((btn) => ( |
| 57 | + <button |
| 58 | + key={btn} |
| 59 | + onClick={ |
| 60 | + btn === "C" |
| 61 | + ? clearInput |
| 62 | + : btn === "=" |
| 63 | + ? calculateResult |
| 64 | + : () => handleButtonClick(btn.toString()) |
| 65 | + } |
| 66 | + className={`calculator-button ${ |
| 67 | + btn === "C" ? "clear" : btn === "=" ? "equal" : "" |
| 68 | + }`} |
| 69 | + > |
| 70 | + {btn} |
| 71 | + </button> |
| 72 | + ))} |
| 73 | + </div> |
61 | 74 | </div>
|
62 | 75 | );
|
63 |
| -} |
| 76 | +}; |
64 | 77 |
|
65 | 78 | export default App;
|
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