函数递归1234，1 2 3 4

#include<stdio.h>

void print(unsigned int n)

{

  if (n > 9)

  {

    print(n / 10);

  }

    printf("%d ",n % 10);

}

int main()

{  

unsigned int num = 0;

scanf("%u",&num);

print(num);

 return 0;

}