The 3n + 1 problem （C语言代码）

解题思路:





注意事项:





参考代码:

import java.util.Scanner;

public class Demo {

    public static int print(int n) {

    int num = 1;

    while(n != 1) {

     if(n % 2 == 0) {

     n = n / 2;  

     }else {

     n = 3 * n + 1;

          }

     num++;

    }

    return num;

    }   

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

int x = in.nextInt(),y = in.nextInt(),max,temp;

if(x>y) {

   temp = x;

   x    = y;

   y    = temp;

}

max = 0;

for(int i=x;i<=y;i++) {

if(max<print(i))

  max = print(i);

}

System.out.println(x+"-"+y+":"+max);

}

}