A tiny calculator for number arithmetics such as +-*/().

Install

• npm

  npm install --save @algorithm.ts/calculate

• yarn

  yarn add @algorithm.ts/calculate

• deno

  import calculate from 'https://raw.githubusercontent.com/guanghechen/algorithm.ts/main/packages/calculate/src/index.ts'

Usage

// Perform integer arithmetics.
import calculate from 'algorithm.ts/calculate'
// or 
import { calculate } from 'algorithm.ts/calculate'

// Perform decimal arithmetics.
import { decimalCalculate } from 'algorithm.ts/calculate'

// Perform bigint arithmetics.
import { bigintCalculate } from 'algorithm.ts/calculate'

Examples

• integer arithmetics

  import calculate from '@algorithm.ts/calculate'
  
  calculate('3/2')                  // => 1
  calculate('-2+1')                 // => -1
  calculate('-2*3 + 2*5*3/6')       // => -1
  calculate('(1+(4+5+2)-3)+(6+8)')  // => 23

• decimal arithmetics

  import { decimalCalculate as calculate } from '@algorithm.ts/calculate'
  
  calculate('3/2')                  // => 1.5
  calculate('-2+1')                 // => -1
  calculate('-2*3 + 2*5*3/6')       // => -1
  calculate('(1+(4+5+2)-3)+(6+8)')  // => 23

• bigint arithmetics

  import { bigintCalculate as calculate } from '@algorithm.ts/calculate'
  
  calculate('22222222222222222222222222222 * 3333333333333333333323232')
  // => 74074074074074074073849599999259259259259259259261504n

• Illegal inputs

  import calculate from '@algorithm.ts/calculate'
  
  calculate('-2++1')      // => SyntaxError
  calculate('-2*/23')     // => SyntaxError
  calculate('1+(4+5+2))') // => SyntaxError
  calculate('1+(4+5+2')   // => SyntaxError

• A solution of https://leetcode.com/problems/basic-calculator/

  export { calculate } from '@algorithm.ts/calculate'

• A solution of https://leetcode.com/problems/basic-calculator-ii/

  export { calculate } from '@algorithm.ts/calculate'

Related

• 编译原理-语法制导翻译实现计算器