/* recur.c -- recursion illustration */
#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); /* 1 */ 
    if (n < 4)
         up_and_down(n+1);
    printf("LEVEL %d: n location %p\n", n, &n); /* 2 */  
 
}