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34-Digit factorials

时间:2018-12-21 00:30:34      阅读:183      评论:0      收藏:0      [点我收藏+]

Digit factorials

Problem 34技术分享图片技术分享图片

145 is a curious number, as 1! + 4! + 5! = 1 + 24 + 120 = 145.
Find the sum of all numbers which are equal to the sum of the factorial of their digits.
Note: as 1! = 1 and 2! = 2 are not sums they are not included.
package main
 
import (
   "fmt"
   "strconv"
)
 
/*
Digit factorialsProblem 34
145 is a curious number, as 1! + 4! + 5! = 1 + 24 + 120 = 145.
Find the sum of all numbers which are equal to the sum of the factorial of their digits.
Note: as 1! = 1 and 2! = 2 are not sums they are not included.
*/
/**
1.把数字转化成字符串,然后拆开
2.判断是否相等
*/
//求一个数的阶乘的函数
func Factorial(n int) int {
   var result int
   if n > 0 {
      result = n * Factorial(n-1)
      return result
   }
   return 1
}
func Breakjc(i int) int {
   result := 0
   str := strconv.Itoa(i)
   for _, n := range str {
      result += Factorial(int(n - 48))
   }
   return result
}
func main() {
   var i, j int
   i = 3
   //求所有组成数字的阶乘和的函数
   for {
      j = Breakjc(i)
      if i == j {
         fmt.Println(i)
      }
      i++
   }
 
}
 

结果:40730

34-Digit factorials

原文:https://www.cnblogs.com/miria-486/p/10153164.html

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