算术精确度

// 算法 // Vue浮点型乘法：

export function NumberMul(arg1, arg2) { var m = 0; var s1 = arg1.toString(); var 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); } // Vue浮点型加法： export function NumberAdd(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)) n = (r1 >= r2) ? r1 : r2; return ((arg1 * m + arg2 * m) / m).toFixed(n); }

// Vue浮点型减法： export function NumberSub(arg1, arg2) { var re1, re2, m, n; try { re1 = arg1.toString().split(".")[1].length; } catch (e) { re1 = 0; } try { re2 = arg2.toString().split(".")[1].length; } catch (e) { re2 = 0; } m = Math.pow(10, Math.max(re1, re2)); n = (re1 >= re2) ? re1 : re2; return ((arg1 * m - arg2 * m) / m).toFixed(n); }

// 除数，被除数， 保留的小数点后的位数 export function NumberDiv(arg1, arg2, digit) { 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(".", "")) //获取小数点后的计算值 var result = ((r1 / r2) * Math.pow(10, t2 - t1)).toString() var result2 = result.split(".")[1]; result2 = result2.substring(0, digit > result2.length ? result2.length : digit);

return Number(result.split(".")[0] + "." + result2); }