递归练习一

//递归练习
//recur.c--函数举例
#include <stdio.h>
void up_and_down (int);
int main (void)
{
up_and_down(1);
return 0;
 } 
 
 void up_and_down (int n)
 {
  printf ("Level %d: n location %p\n",n,&n);
  if (n<4)
  up_and_down (n+1);
  printf ("LEVEL %d : n location %p\n ",n,&n);
 }