<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>jQuery计算器</title>
<style>
body {
font-family: Arial, sans-serif;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
background-color: #f5f5f5;
margin: 0;
}
.calculator {
background-color: #fff;
border-radius: 10px;
box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
padding: 20px;
width: 300px;
}
.display {
background-color: #f9f9f9;
border: 1px solid #ddd;
border-radius: 5px;
padding: 15px;
margin-bottom: 15px;
text-align: right;
font-size: 24px;
height: 30px;
}
.buttons {
display: grid;
grid-template-columns: repeat(4, 1fr);
grid-gap: 10px;
}
button {
background-color: #4CAF50;
color: white;
border: none;
border-radius: 5px;
padding: 15px;
font-size: 18px;
cursor: pointer;
transition: background-color 0.3s;
}
button:hover {
background-color: #45a049;
}
.operator {
background-color: #ff9800;
}
.operator:hover {
background-color: #e68a00;
}
.clear {
background-color: #f44336;
}
.clear:hover {
background-color: #d32f2f;
}
.equals {
background-color: #2196F3;
}
.equals:hover {
background-color: #0b7dda;
}
.footer {
margin-top: 20px;
text-align: center;
font-size: 12px;
color: #666;
}
</style>
</head>
<body>
<div class="calculator">
<div class="display" id="display">0</div>
<div class="buttons">
<button class="clear" id="clear">C</button>
<button class="operator" id="backspace">←</button>
<button class="operator" id="percent">%</button>
<button class="operator" id="divide">/</button>
<button class="number" id="seven">7</button>
<button class="number" id="eight">8</button>
<button class="number" id="nine">9</button>
<button class="operator" id="multiply">×</button>
<button class="number" id="four">4</button>
<button class="number" id="five">5</button>
<button class="number" id="six">6</button>
<button class="operator" id="subtract">-</button>
<button class="number" id="one">1</button>
<button class="number" id="two">2</button>
<button class="number" id="three">3</button>
<button class="operator" id="add">+</button>
<button class="number" id="zero">0</button>
<button class="number" id="decimal">.</button>
<button class="equals" id="equals" colspan="2">=</button>
</div>
<div class="footer">
<p>简单计算器 - 由jQuery驱动</p>
</div>
</div>
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script>
$(document).ready(function() {
let currentInput = '0';
let previousInput = '';
let operation = null;
let resetScreen = false;
// 更新显示
function updateDisplay() {
$('#display').text(currentInput);
}
// 数字按钮点击事件
$('.number').click(function() {
const number = $(this).text();
if (currentInput === '0' || resetScreen) {
currentInput = number;
resetScreen = false;
} else {
currentInput += number;
}
updateDisplay();
});
// 运算符按钮点击事件
$('.operator').click(function() {
const operator = $(this).text();
if ($(this).attr('id') === 'backspace') {
// 退格功能
if (currentInput.length === 1) {
currentInput = '0';
} else {
currentInput = currentInput.slice(0, -1);
}
updateDisplay();
return;
}
if ($(this).attr('id') === 'percent') {
// 百分比功能
currentInput = (parseFloat(currentInput) / 100).toString();
updateDisplay();
return;
}
if (operation !== null) calculate();
previousInput = currentInput;
operation = operator;
resetScreen = true;
});
// 等号按钮点击事件
$('#equals').click(function() {
calculate();
operation = null;
});
// 清除按钮点击事件
$('#clear').click(function() {
currentInput = '0';
previousInput = '';
operation = null;
updateDisplay();
});
// 小数点按钮点击事件
$('#decimal').click(function() {
if (resetScreen) {
currentInput = '0.';
resetScreen = false;
updateDisplay();
return;
}
if (!currentInput.includes('.')) {
currentInput += '.';
updateDisplay();
}
});
// 计算函数
function calculate() {
let result;
const prev = parseFloat(previousInput);
const current = parseFloat(currentInput);
if (isNaN(prev) || isNaN(current)) return;
switch (operation) {
case '+':
result = prev + current;
break;
case '-':
result = prev - current;
break;
case '×':
result = prev * current;
break;
case '/':
result = prev / current;
break;
default:
return;
}
currentInput = result.toString();
resetScreen = true;
updateDisplay();564
}
// 初始化显示
updateDisplay();
});
</script>
</body>
</html>
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