Precise calculation of js floating point numbers (addition, subtraction, multiplication, division)_javascript skills

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/ /Note: The addition result of JavaScript will have errors, which will be more obvious when adding two floating point numbers. This function returns a more accurate addition result.
//Call: accAdd(arg1,arg2)
//Return value: the exact result of arg1 plus arg2
function accAdd(arg1,arg2){
var r1,r2,m;
try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0}
try{r2=arg2.toString().split(". ")[1].length}catch(e){r2=0}
m=Math.pow(10,Math.max(r1,r2))
return (arg1*m arg2*m)/ m
}

Copy code The code is as follows: >

//Explanation: The subtraction result of JavaScript will have errors, which will be more obvious when adding two floating point numbers. This function returns a more accurate subtraction result.
//Call: accSub(arg1,arg2)
//Return value: the exact result of arg1 minus arg2
function accSub(arg1,arg2){
return accAdd(arg1,-arg2) ;
}

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//Explanation: The multiplication result of JavaScript will have errors, which will be more obvious when two floating point numbers are multiplied. This function returns a more accurate multiplication result.
//Call: accMul(arg1,arg2)
//Return value: the exact result of multiplying arg1 by arg2
function accMul(arg1,arg2)
{
var m=0, s1=arg1.toString(),s2=arg2.toString();
try{m =s1.split(".")[1].length}catch(e){}
try{m = s2.split(".")[1].length}catch(e){}
return Number(s1.replace(".",""))*Number(s2.replace("."," "))/Math.pow(10,m)
}

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//Explanation: There will be an error in the division result of javascript, between the two It will be more obvious when dividing floating point numbers. This function returns a more accurate division result.
//Call: accDiv(arg1,arg2)
//Return value: the exact result of dividing arg1 by arg2
function accDiv(arg1,arg2){
var t1=0,t2=0 ,r1,r2;
try{t1=arg1.toString().split(".")[1].length}catch(e){}
try{t2=arg2.toString().split (".")[1].length}catch(e){}
with(Math){
r1=Number(arg1.toString().replace(".",""))
       r2=Number(arg2.toString().replace(".",""))                                                                                                                                                                                                    /SPAN>