js中精确计算加法和减法示例

/精确计算加法和减法。例如0.1+0.2=0.3或 0.1-0.2=-0.1
复制代码 代码如下:
function addFn(dataOne,dataTwo){

var dataoneInt=dataOne.toString().split(".")[0];
var dataoneFloat="";
var dataTwoInt=dataTwo.toString().split(".")[0];
var dataTwoFloat="";
var lengthOne=0;
var lengthTwo=0;
var maxlength=0;

if(dataOne.toString().split(".").length==2){
dataoneFloat=dataOne.toString().split(".")[1];
lengthOne=dataOneFloat.toString().length;

}
if(dataTwo.toString().split(".").length==2){
dataTwoFloat=dataTwo.toString().split(".")[1];
lengthTwo=dataTwoFloat.toString().length;

}

maxLength=Math.max(lengthOne,lengthTwo);
for(var i=0;idataOneFloat+="0";
}
for(var i=0;idataTwoFloat+="0";
}


var one=dataOneInt+""+dataOneFloat;
var two=dataTwoInt+""+dataTwoFloat;
//alert("dataOne:"+dataOne+" dataTwo:"+dataTwo +" one:"+one+" two:"+two);


var result= (Number(one)+Number(two))/Math.pow(10,maxLength);

return result;

}