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//Division function, used to obtain accurate division results
//Explanation: 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: accp(arg1,arg2)
//Return value: the exact result of dividing arg1 by arg2
function accp(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); } }
//Increase the Number type A p method is more convenient to call.
Number.prototype.p = function (arg){
return accp(this, arg);
}
//Multiplication function, used to obtain accurate multiplication results
//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); }
//Increase the Number type A mul method is more convenient to call.
Number.prototype.mul = function (arg){ return accMul(arg, this); };
//Addition function, used to obtain accurate addition results
//Explanation: 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; }
//给Number类型增加一个add方法,调用起来更加方便。 Number.prototype.add = function (arg){ return accAdd(arg,this); } //减法函数 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 //动态控制精度长度 n=(r1>=r2)?r1:r2; return ((arg2*m-arg1*m)/m).toFixed(n); } ///给number类增加一个sub方法,调用起来更加方便 Number.prototype.sub = function (arg){ return accSub(arg,this); }
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