老师检查一下作业
来源：4-14 项目作业
慕函数0445997
2022-11-24 11:25:13
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<input type="text" id="left_text">
<select id="operator">
<option value="+">+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select>
<input type="text" id="right_text">
<button id="btn">=</button>
<input type="text" id="result">
<script>
var leftText=document.getElementById('left_text');
var operator=document.getElementById('operator');
var rightText=document.getElementById('right_text');
var btn=document.getElementById('btn');
var result=document.getElementById('result');
btn.onclick=function(){
var leftNum=Number(leftText.value);
var rightNum=Number(rightText.value);
switch(operator.value){
case '+':
result.value=leftNum+rightNum;
break;
case '-':
result.value=leftNum-rightNum;
break;
case '*':
result.value=leftNum*rightNum;
break;
case '/':
result.value=leftNum/rightNum;
break;
}
}
</script>
</body>
</html>
1回答
-
好帮手慕星星
2022-11-24
同学你好，代码计算没问题。继续加油，祝学习愉快！
0
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