#include<stdio.h>

/* another funny program
   (c) burt rosenberg, 1994
*/

int main() {
  int (*a)[5] ;
  int space[100] ;
  int i, j ;

  printf("this is 1: %d, this is 5: %d\n", (a+1)-a, *(a+1)-*a) ;
  a =(int (*)[5]) space ; 
  for (j=0;j<5;j++) {
     for (i=0;i<5;i++) (*a)[i] = i+5*j ;
     a++ ;
  }
  printf("these are the numbers 0 to 24:\n") ;
  for (j=0;j<25;j++) printf("%d ",space[j]) ;
  printf("\n") ;

}