Js arithmetic function code

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// Division function, used to obtain accurate division results
// Note: the division result of javascript has an error, which is obvious when two floating point numbers are separated. This function returns a more precise 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 );
}
}
// Add a div Method to the Number type to facilitate calling.
Number. prototype. div = function (arg ){
Return accDiv (this, arg );
};
// Multiplication function, used to obtain accurate multiplication results
// Note: there is an error in the javascript multiplication result, which is 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 );
}
// Add a mul Method to the Number type to facilitate calling.
Number. prototype. mul = function (arg ){
Return accMul (arg, this );
};
// Addition function, used to obtain accurate addition results
// Note: The addition result of javascript has an error, which is obvious when two floating point numbers are added. This function returns a more accurate addition result.
// Call: accAdd (arg1, arg2)
// Return value: the exact result of adding arg2 to arg1
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;
}
// Add an add method to the Number type to facilitate calling.
Number. prototype. add = function (arg ){
Return accAdd (arg, this );
};
// Subtraction Function
Function accSub (arg1, arg2 ){
Var r1, r2, m, n;
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 ));
// Last modify by deeka
// Dynamically control the Precision Length
N = (r1> = r2 )? R1: r2;
Return (arg2 * m-arg1 * m)/m). toFixed (n );
}
/// Add a sub method to the number class to facilitate the call
Number. prototype. sub = function (arg ){
Return accSub (arg, this );
};