Accurate calculation of js floating point numbers (addition, subtraction, multiplication, division)

Copy the code code as follows:

<SPAN style="FONT-SIZE: 18px">//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

}</SPAN>

Copy the code code as follows:

<SPAN style="FONT-SIZE: 18px">

//Note: 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);

}</SPAN>

Copy the code code as follows:

<SPAN style="FONT-SIZE: 18px">

//Note: 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)

}</SPAN>

Copy the code code as follows:

<SPAN style="FONT-SIZE: 18px">

//Note: The division result of JavaScript will have errors, which will be more obvious when dividing two 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(".",""))

return (r1/r2)*pow(10,t2-t1);

}

}</SPAN>