Floating point data operation accuracy Bug

/** * Check whether it is a number * @param arg * @return*/        functionCheckisnumber (ARG) {if(Arg! =NULL&& arg.tostring ()! = ""){                varRe =/^-? (0| [1-9]+\d*| [1-9]+\d*\.\d+|0\.\d+] $/; if(Re.test (arg.tostring ())) {return true; }            }            return false; }        /** * addition function for accurate addition results * Description: JavaScript addition results will be error, when the two floating-point number added will be more obvious.         This function returns a more accurate addition result. * Return value Note: Arg1 and arg2 may be integers, floating-point numbers, null, empty strings, other strings * @param arg1 * @param arg2 * @return*/        functionAccadd (arg1,arg2) {if(!checkisnumber (arg1) | |!Checkisnumber (ARG2)) {                return NULL; }            varr1,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;        }        //Adding an Add method to the number type makes it more convenient to call. Number.prototype.add =function(ARG) {returnAccadd ( This, ARG); }        /** subtraction function, used to get accurate subtraction results * Description: JavaScript subtraction results will be error, when the two floating-point subtraction will be more obvious.         This function returns a more accurate subtraction result.         * Return value: ARG1-ARG2 values, arg1 and arg2 may be integers, floating-point numbers, null, empty strings, other strings * @param arg1 * @param arg2 * @return */        functionaccsub (arg1,arg2) {if(!checkisnumber (arg1) | |!Checkisnumber (ARG2)) {                return NULL; }            varR1,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)); //n= (R1>=R2)? R1:R2;//Control accuracy            //return ((arg1*m-arg2*m)/m). ToFixed (n);            return(arg1*m-arg2*m)/m;        }        //Adding a Subduct method to the number type makes it more convenient to call. Number.prototype.subduct =function(ARG) {returnAccsub ( This, ARG); }        /** division function, used to get the exact division result * Description: JavaScript division results will be error, when the two floating point number is more obvious when dividing.         This function returns a more accurate division result. * Return value: Arg1 divided by arg2 exact result * @param arg1 * @param arg2 * @return*/        functionAccdiv (arg1,arg2) {if(!checkisnumber (arg1) | |!Checkisnumber (ARG2)) {                return NULL; }            varT1,T2,R1,R2; Try{t1=arg1.tostring (). Split (".") [1].length;}Catch(e) {t1=0;} Try{t2=arg2.tostring (). Split (".") [1].length;}Catch(e) {t2=0;}  with(Math) {R1=number (Arg1.tostring (). Replace (".", "")); R2=number (Arg2.tostring (). Replace (".", "")); return(R1/R2) *pow (10,T2-T1);            }         }         //Adding a Div method to the number type makes it easier to call. Number.prototype.div =function(ARG) {returnAccdiv ( This, ARG); }         /** multiplication function for accurate multiplication results * Description: JavaScript multiplication results are error-evident when multiplying two floating-point numbers.         This function returns a more accurate multiplication result. * Return value: Arg1 times the exact result of ARG2 * @param arg1 * @param arg2 * @return*/        functionAccmul (arg1,arg2) {if(!checkisnumber (arg1) | |!Checkisnumber (ARG2)) {                return NULL; }            varM=0,s1=arg1.tostring (), s2=arg2.tostring (); Try{M+=s1.split (".") [1].length;}Catch(e) {}Try{M+=s2.split (".") [1].length;}Catch(e) {}returnNumber (S1.replace (".", "")) *number (S2.replace (".", ""))/math.pow (10,m);        }         //Adding a Mul method to the number type makes it more convenient to call. Number.prototype.mul =function(ARG) {returnAccmul ( This, ARG); } console.log (Accadd (0.3,0.2) + "" +accsub (0.3,0.2))

Floating point data operation accuracy Bug