jQuery简单计算器

原创已于 2025-06-27 14:23:14 修改 · 670 阅读

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于 2025-05-16 13:48:04 首次发布

<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>jQuery简单计算器</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: #333;
border-radius: 10px;
padding: 20px;
box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
width: 300px;
}
.display {
background-color: #eee;
border-radius: 5px;
padding: 15px;
margin-bottom: 15px;
text-align: right;
font-size: 24px;
height: 30px;
overflow: hidden;
}
.buttons {
display: grid;
grid-template-columns: repeat(4, 1fr);
grid-gap: 10px;
}
button {
border: none;
border-radius: 5px;
padding: 15px;
font-size: 18px;
cursor: pointer;
background-color: #4CAF50;
color: white;
transition: background-color 0.3s;
}
button:hover {
background-color: #45a049;
}
.operator {
background-color: #f39c12;
}
.operator:hover {
background-color: #e67e22;
}
.clear {
background-color: #e74c3c;
}
.clear:hover {
background-color: #c0392b;
}
.equals {
background-color: #3498db;
}
.equals:hover {
background-color: #2980b9;
}
.footer {
margin-top: 15px;
text-align: center;
color: white;
font-size: 12px;
}
a {
color: #4CAF50;
text-decoration: none;
}
a:hover {
text-decoration: underline;
}
</style>
</head>
<body>
<div class="calculator">
<div class="display" id="display">0</div>
<div class="buttons">
<button class="clear">C</button>
<button class="operator">/</button>
<button class="operator">*</button>
<button class="operator">-</button>
<button>7</button>
<button>8</button>
<button>9</button>
<button class="operator">+</button>
<button>4</button>
<button>5</button>
<button>6</button>
<button>1</button>
<button>2</button>
<button>3</button>
<button class="equals">=</button>
<button>0</button>
<button>.</button>
</div>

</div>

// 更新显示
function updateDisplay() {
$('#display').text(currentInput);
}

// 处理数字按钮点击
$('button:not(.operator):not(.clear):not(.equals)').click(function() {
const number = $(this).text();

if (currentInput === '0' || resetScreen) {
currentInput = number;
resetScreen = false;
} else {
currentInput += number;
}

updateDisplay();
});

// 处理操作符按钮点击
$('.operator').click(function() {
if (operation !== null) calculate();
previousInput = currentInput;
operation = $(this).text();
resetScreen = true;
});

// 处理等号按钮点击
$('.equals').click(function() {
calculate();
operation = null;
});

// 处理清除按钮点击
$('.clear').click(function() {
currentInput = '0';
previousInput = '';
operation = null;
updateDisplay();
});

// 执行计算
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();
}
});
</script>
</body>
</html>