先看效果：
此外，计算器还附有数字、运算符检查功能：
下贴源码：
<!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=utf-8" />
<title>计算器</title>
<script language="javascript">
var oper1=prompt("请输入第一个操作数：");
var oper2=prompt("请输入第二个操作数：");
var operator=prompt("请输入运算符（+，-，*，/）");
parse();
var result;
switch(operator)
{
case"+":
result=doSum(oper1,oper2);
alert(oper1+"+"+oper2+"="+result);
break;
case"-":
result=doSubstract(oper1,oper2);
alert(oper1+"-"+oper2+"="+result);
break;
case"*":
result=doMultiply(oper1,oper2);
alert(oper1+"*"+oper2+"="+result);
break;
case"/":
result=doDivide(oper1,oper2);
alert(oper1+"/"+oper2+"="+result);
break;
default:
alert("输入的运算符不合法");
}
function parse(){
if(isNaN(oper1)||isNaN(oper2)){
alert("输入的数字不合法");
}
else{
oper1=parseFloat(oper1);
oper2=parseFloat(oper2);
}
}
function doSum(oper1,oper2){
return oper1+oper2;
}
function doSubstract(oper1,oper2){
return oper1-oper2;
}
function doMultiply(oper1,oper2){
return oper1*oper2;
}
function doDivide(oper1,oper2){
return oper1/oper2;
}
</script>
</head>
<body>
</body>
</html>
当然，这里只展示了JavaScript源码，还可以使用html+css给计算器设计好看的外观，大家随意发挥。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
