HTML 简易计算器：使用表单控件构建界面并实现计算功能
<!DOCTYPE html>
<html>
<head>
<title>简易计算器</title>
<meta charset='utf-8'>
<style type='text/css'>
body {
font-family: Arial, sans-serif;
background-color: #f5f5f5;
}
<pre><code> h1 {
text-align: center;
margin-top: 50px;
}
form {
display: flex;
flex-wrap: wrap;
justify-content: center;
align-items: center;
margin-top: 30px;
}
input[type='number'] {
width: 150px;
height: 40px;
font-size: 20px;
margin: 10px;
padding: 5px;
border: none;
border-radius: 5px;
background-color: #fff;
box-shadow: 1px 1px 3px #ccc;
}
input[type='submit'] {
width: 100px;
height: 40px;
font-size: 20px;
margin: 10px;
padding: 5px;
border: none;
border-radius: 5px;
background-color: #4CAF50;
color: #fff;
cursor: pointer;
}
input[type='reset'] {
width: 100px;
height: 40px;
font-size: 20px;
margin: 10px;
padding: 5px;
border: none;
border-radius: 5px;
background-color: #f44336;
color: #fff;
cursor: pointer;
}
.result {
font-size: 30px;
font-weight: bold;
text-align: center;
margin-top: 30px;
}
</style>
</code></pre>
</head>
<body>
<h1>简易计算器</h1>
<form>
<input type='number' name='num1' placeholder='请输入第一个数字' required>
<select name='operator'>
<option value='+'>+</option>
<option value='-'>-</option>
<option value='*'>*</option>
<option value='/'>/</option>
</select>
<input type='number' name='num2' placeholder='请输入第二个数字' required>
<input type='submit' name='submit' value='计算'>
<input type='reset' name='reset' value='重置'>
</form>
<div class='result'>
<?php
if(isset($_GET['submit'])) {
$num1 = $_GET['num1'];
$num2 = $_GET['num2'];
$operator = $_GET['operator'];
switch($operator) {
case '+':
echo $num1 + $num2;
break;
case '-':
echo $num1 - $num2;
break;
case '*':
echo $num1 * $num2;
break;
case '/':
if($num2 != 0) {
echo $num1 / $num2;
} else {
echo '除数不能为0';
}
break;
}
}
?>
</div>
</body>
</html>
原文地址: https://www.cveoy.top/t/topic/mvtw 著作权归作者所有。请勿转载和采集!