//精准加法函数
exports.add = function(arg1, arg2) {
var r1, r2, m, c;
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));
c = Math.abs(r1 - r2);
if (c > 0) {
var cm = Math.pow(10, c);
if (r1 > r2) {
arg1 = Number(arg1.toString().replace(".", ""));
arg2 = Number(arg2.toString().replace(".", "")) * cm;
} else {
arg1 = Number(arg1.toString().replace(".", "")) * cm;
arg2 = Number(arg2.toString().replace(".", ""));
}
} else {
arg1 = Number(arg1.toString().replace(".", ""));
arg2 = Number(arg2.toString().replace(".", ""));
}
return (arg1 + arg2) / m;
},
//精准减法函数
exports.sub = function(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)); //last modify by deeka //动态控制精度长度
return (exports.mul(arg1, m) - exports.mul(arg2, m)) / m;
},
//精准乘法函数
exports.mul = function(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);
},
//精准除法函数
exports.div = function(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) {}
r1 = Number(arg1.toString().replace(".", ""));
r2 = Number(arg2.toString().replace(".", ""));
return mul(r1 / r2, Math.pow(10, t2 - t1));
},
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