偶尔在一些git代码中看到一些关于浮点数运算的代码,拿过来备用之后可以用下.
//浮点数相加
export const MathAdd = (a, b) => {
a = a ? a : 0;
b = b ? b : 0;
var c, d, e;
try {
c = a.toString().split('.')[1].length;
} catch (f) {
c = 0;
}
try {
d = b.toString().split('.')[1].length;
} catch (f) {
d = 0;
}
return (e = Math.pow(10, Math.max(c, d))), (MathMul(a, e) + MathMul(b, e)) / e;
};
// 浮点数相减
export const MathSub = (a, b) => {
a = a ? a : 0;
b = b ? b : 0;
var c, d, e;
try {
c = a.toString().split('.')[1].length;
} catch (f) {
c = 0;
}
try {
d = b.toString().split('.')[1].length;
} catch (f) {
d = 0;
}
return (e = Math.pow(10, Math.max(c, d))), (MathMul(a, e) - MathMul(b, e)) / e;
};
// 浮点数相乘
export const MathMul = (a, b) => {
a = a ? a : 0;
b = b ? b : 0;
var c = 0,
d = a.toString(),
e = b.toString();
try {
c += d.split('.')[1].length;
} catch (f) {}
try {
c += e.split('.')[1].length;
} catch (f) {}
return (Number(d.replace('.', '')) * Number(e.replace('.', ''))) / Math.pow(10, c);
};
// 浮点数相除
export const MathDiv = (a, b) => {
a = a ? a : 0;
b = b ? b : 0;
var c,
d,
e = 0,
f = 0;
try {
e = a.toString().split('.')[1].length;
} catch (g) {}
try {
f = b.toString().split('.')[1].length;
} catch (g) {}
return (c = Number(a.toString().replace('.', ''))), (d = Number(b.toString().replace('.', ''))), MathMul(c / d, Math.pow(10, f - e));
};
