js 0.1+0.2 结果不是0.3,而是0.30000000000000004 处理方法

js 0.1+0.2 结果不是0.3,而是0.30000000000000004 处理方法

转换为整数，得到结果后再转为小数

function plus(a, b){
  // code
  let mode = 10
  let count = 1
  let tmp = Math.min(a, b)
  while(!Number.isInteger(tmp)){
    tmp *= mode
    count += 1
  }
  
  let res = parseFloat((a*(count*mode)+b*(count*mode))/(count*mode))
  return res
}

console.log(plus(0.1, 0.2))

toFixed错误的场景

console.log(50250/50000, (50250/50000).toFixed(2))