34-Digit factorials

Digit factorials

Problem 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.

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

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