html+js+css计算器
时间: 2023-07-25 11:38:28 浏览: 44
好的,以下是一个简单的 HTML、CSS、JavaScript 实现的计算器:
HTML 代码:
```
<!DOCTYPE html>
<html>
<head>
<title>计算器</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="calculator">
<div class="display">
<input type="text" id="result" disabled>
</div>
<div class="buttons">
<button onclick="clearResult()">C</button>
<button onclick="backspace()">←</button>
<button onclick="insertValue('%')">%</button>
<button onclick="insertValue('/')">÷</button>
<button onclick="insertValue('7')">7</button>
<button onclick="insertValue('8')">8</button>
<button onclick="insertValue('9')">9</button>
<button onclick="insertValue('*')">x</button>
<button onclick="insertValue('4')">4</button>
<button onclick="insertValue('5')">5</button>
<button onclick="insertValue('6')">6</button>
<button onclick="insertValue('-')">-</button>
<button onclick="insertValue('1')">1</button>
<button onclick="insertValue('2')">2</button>
<button onclick="insertValue('3')">3</button>
<button onclick="insertValue('+')">+</button>
<button onclick="insertValue('0')">0</button>
<button onclick="insertValue('.')">.</button>
<button onclick="calculate()">=</button>
</div>
</div>
<script src="script.js"></script>
</body>
</html>
```
CSS 代码:
```
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
background-color: #f2f2f2;
font-size: 16px;
font-family: Arial, sans-serif;
}
.calculator {
margin: 50px auto;
width: 300px;
background-color: #fff;
border-radius: 10px;
box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.2);
}
.display {
padding: 10px;
border-bottom: 1px solid #ccc;
}
.display input {
width: 100%;
border: none;
font-size: 20px;
text-align: right;
}
.buttons {
display: grid;
grid-template-columns: repeat(4, 1fr);
grid-gap: 1px;
}
.buttons button {
padding: 10px;
font-size: 20px;
background-color: #f2f2f2;
border: none;
cursor: pointer;
}
.buttons button:hover {
background-color: #ddd;
}
```
JavaScript 代码:
```
let result = document.getElementById('result');
function insertValue(val) {
result.value += val;
}
function clearResult() {
result.value = '';
}
function backspace() {
result.value = result.value.slice(0, -1);
}
function calculate() {
let expression = result.value;
if (expression) {
result.value = eval(expression);
}
}
```
该计算器实现了加减乘除四则运算、百分比计算、清除、删除、等于号计算和小数点输入的功能。