switch实现一个两数的运算代码示例

Z时代
2024-01-10
分类：综合

具体代码如下所示：


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>编写一个带有两个变量和一个运算符的函数，调用时接收prompt输入</title>
<script language="javascript" type="text/javascript">
function account()
{
   var op1=prompt("请输入第一个数：","");
  var op2=prompt("请输入第二个数：","");
  var sign=prompt("请输入运算符号","")
  var result;
  opp1=parseFloat(op1);
  opp2=parseFloat(op2);
  switch(sign)
  {
    case "+":
    result=opp1+opp2;
    alert("两数运算结果为："+result);
    break;
    case "-":
    result=opp1-opp2;
    alert("两数运算结果为："+result);
    break;
    case "*":
    result=opp1*opp2;
    alert("两数运算结果为："+result);
    break;
    default:
    result=opp1/opp2;
    alert("两数运算结果为："+result);
    break;
  }
}
</script>
</head>
<body>
<input name="btn" type="button" value="计算两数运算结果" onclick="account();" />
</body>
</html>