pink老师第n弟子的javascript的作业打卡
<!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>简易计算器</title>
<script>
while (true) {
var select = prompt('欢迎使用简易计算器：\n1.加法运算；\n2.减法运算\n3.乘法运算；\n4.除法运算；\n5.退出；\n请输入您的选项：');
select = parseInt(select);
function jiafa(){
num1 = prompt('请您输入第一个数');
num2 = prompt('请您输入第二个数');
var sum = parseInt(num1)+parseInt(num2);
alert(num1+'+'+num2+'的结果是'+sum);
}
function jianfa(){
num1 = prompt('请您输入第一个数');
num2 = prompt('请您输入第二个数');
if(num1>num2){
var sum = parseInt(num1)-parseInt(num2);
alert(num1+'-'+num2+'的结果是'+sum);
}else if(num1<num2){
alert('第一个数比第二个数小，打灭打咩！重新输入！');
jianfa();
}
}
function chengfa(){
num1 = prompt('请您输入第一个数');
num2 = prompt('请您输入第二个数');
var sum = parseInt(num1)*parseInt(num2);
alert(num1+'*'+num2+'的结果是'+sum);
}
function chufa(){
num1 = prompt('请您输入第一个数');
num2 = prompt('请您输入第二个数');
var sum = parseInt(num1)/parseInt(num2);
alert(num1+'/'+num2+'的结果是'+sum);
}
switch (select) {
case 1:
jiafa();
break;
case 2:
jianfa();
break;
case 3:
chengfa();
break;
case 4:
chufa();
break;
case 5:
alert('退出成功！');
break;
default:
alert('不懂。。');
break;
}
if (select == 5) {
break;
}
}
</script>
</head>
<body>
</body>
</html>