calculate-asmd

calculate-asmd

javascript 精确四则运算

生产原因

浮点数运算 0.2 + 0.4 = 0.6 ？

使用

安装

yarn add calculate-asmd --dev

or

npm install calculate-asmd --save-dev

Demo

import { add, sub, mul, div } from 'calculate-asmd'

/** 加法 */
  const addNum = add(0.2, 0.4);
  console.log("add(0.2, 0.4): ", addNum);
  const addNegative = add(0.2, -0.4);
  console.log("add(0.2, -0.4): ", addNegative);
  /**
   *add(0.2, 0.4):  0.6
   *add(0.2, -0.4):  -0.2
   */

/** 减法 */
  const subNum = sub(0.2, 0.4);
  console.log("sub(0.2, 0.4): ", subNum);
  const subNegative = sub(0.2, -0.4);
  console.log("sub(0.2, -0.4): ", subNegative);
  /**
   *sub(0.2, 0.4):  -0.2
   *sub(0.2, -0.4):  0.6
   */


/** 乘法 */
  const mulNum = mul(0.57, 100);
  console.log("mul(0.57, 100): ", mulNum);
  const mulNegativ = mul(-0.57, 100);
  console.log("mul(-0.57, 100): ", mulNegativ);
  /**
   *mul(0.57, 100):  57
   *mul(-0.57, 100):  -57
   */

/** 除法 */
  const divNum = div(0.57, 100);
  console.log("div(0.57, 100): ", divNum);
  const divNegative = div(-0.57, 100);
  console.log("div(-0.57, 100): ", divNegative);
  /**
   *div(0.57, 100):  0.0057
   *div(-0.57, 100):  -0.0057
   */