运行出期待的结果，但不知是否有优化空间

源自：6-11 编程练习

<!DOCTYPE html>

<html>

<head>

function count(){

//获取第一个输入框的值

var txt1= document.getElementById("txt1").value;

var int1=parseInt(txt1);

//获取第二个输入框的值

var txt2= document.getElementById("txt2").value;

var int2=parseInt(txt2);

//获取选择框的值

var select1= document.getElementById("select").value;

//获取通过下拉框来选择的值来改变加减乘除的运算法则

var fruit=0;

switch(select1){

case "-":

fruit = int1-int2;

break;

case "*":

fruit = int1*int2;

break;

case "/":

fruit = int1/int2;

break;

default:

fruit = int1+int2;

}

//设置结果输入框的值

document.getElementById("fruit").value = fruit;

}

</script>

</head>

<body>

</select>

</body>

</html>

提问者：qq_慕桂英2569262 2019-02-14 15:31