Question

我似乎无法运行一个相对简单的开关盒计算器，请你纠正我的错误我提出的提示没有出现。

<html>
<body>
<script language = "javascript">
var x;
var a = 12;
var b = 20;
x= parseInt(prompt("Enter your Choice"));
switch(x)
{
Case 1 : document.write("The Sum is : ",a+b);
break;
Case 2 : document.write("The Difference is : ",a-b);
break;
Case 3 : document.write("The Product is : ",a*b);
break;
Case 4 : document.write("The quotient is : ",a/b);
break;
default : document.write("Invalid Choice");
break;
}
</script>
</body>
</html>

Answer 1

你在案件中对C进行了限制，因为javascript具有案例意义，因此无法运行。

var x;
var a = 12;
var b = 20;
x= parseInt(prompt("Enter your Choice"));
switch(x)
{
case 1 : document.write("The Sum is : ",a+b);
break;
case 2 : document.write("The Difference is : ",a-b);
break;
case 3 : document.write("The Product is : ",a*b);
break;
case 4 : document.write("The quotient is : ",a/b);
break;
default : document.write("Invalid Choice");
break;
}

这应该有效。

Answer 2

将Case更改为case，JavaScript是区分大小写的编程语言。

查看here了解更多信息.. !!

<html>
    <body>
    <script language = "javascript">
  
    var x;
    var a = 12;
    var b = 20;
    x= parseInt(prompt("Enter your Choice"));
    switch(x)
    {
    case 1 : document.write("The Sum is : ",a+b);
    break;
    case 2 : document.write("The Difference is : ",a-b);
    break;
    case 3 : document.write("The Product is : ",a*b);
    break;
    case 4 : document.write("The quotient is : ",a/b);
    break;
    default : document.write("Invalid Choice");
    break;
    }

    </script>
    </body>
    </html>

这是相同的工作条件代码。

提示不会显示

2 个答案: