练习_#include

#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
void print(int n) {
  if (n > 9)
  {
    print(n / 10);
  }
  printf("%d ", n % 10);
}
int main()
{
  int num = 1234;
  print(num);
  return 0;
}