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js implements the multiplication and division functions of two decimals
js implements the multiplication and division functions of two decimals
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>jquery中的ajax</title>
<script type="text/javascript" src="js/jquery-1.7.1.min.js"></script>
<style type="text/css">
</style>
<script type="text/javascript">
//计算两个数相乘
function Mul(arg1, arg2){
var m=0,s1=arg1.toString(),s2=arg2.toString();
//获取两个相乘数据的小数点后面的数据的长度，即获取小数的位数，因为最终相乘计算的结果：结果小数的位数=第一个数的小数位数+第二个数的小数位数
try{
m+=s1.split(".")[1].length;
}catch(e){}
try{
m+=s2.split(".")[1].length;
}catch(e){}
//将两个小数去掉小数点，强制转换整个值（即进行数值放开小数点位数的倍数），然后进行相乘的操作，相乘的结果除去10的m次方
return Number(s1.replace(".",""))*Number(s2.replace(".",""))/Math.pow(10,m);
}
//计算两个数相除
function division(arg1, arg2){
var t1 = 0, t2 = 0, r1, r2;
try {
t1 = new String(arg1).split(".")[1].length;
} catch (e) { }
try {
t2 = arg2.toString().split(".")[1].length;
} catch (e) { }
r1 = Number(new String(arg1).replace(".", ""));
r2 = Number(arg2.toString().replace(".", ""));
//放大倍数后两个数相除 后，乘以两个小数位数长度相减后的10的次幂
var money = Mul((r1 / r2),Math.pow(10, t2 - t1));
//保留2个小数位数
return money.toFixed(2);
}
$(function(){
alert(Mul(1.414,1.732));
alert(division(1.732,1.4146));
});
</script>
</head>
<body>
</body>
</html>
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