/*
 * ISA 563, Spring 2011
 * Copyleft by Muhammad Abdulla
 */

#include <stdio.h>
#include <stdlib.h>

#include "stack3.h"

#define MAXLINE 32

int main ( int argc, char *argv[] )
{
   int i;
   char line[MAXLINE];

   fprintf(stdout, "Please enter numbers to stacked:\n");

   Stack stack1;
   Stack stack2;

   Stack *s1 = &stack1; 
   Stack *s2 = &stack2; 

   stack_init(s1);
   stack_init(s2);

   // put some numbers into stack
   while ( fgets(line, sizeof(line), stdin) ) {
      i = atoi(line); 

      if ( ! stack_full(s1) ) {
         stack_push(s1, i);
      }
   }

   // pop numbers, print them, and push them into another stack
   fprintf(stdout, "Numbers in reverse order:\n");
   while ( ! stack_empty(s1) ) {
      i = stack_pop(s1);
      fprintf(stdout, "%d\n", i);

      if ( ! stack_full(s2) ) {
         stack_push(s2, i);
      }
      
   }

   // pop numbers from the second stack
   fprintf(stdout, "Numbers in original order:\n");
   while ( ! stack_empty(s2) ) {
      i = stack_pop(s2);
      fprintf(stdout, "%d\n", i);
   }

   // but we can still play with the stack, can totally mess things up
   s2->stack_idx = 3;
   fprintf(stdout, "stack_idx is changed:\n");
   while ( ! stack_empty(s2) ) {
      i = stack_pop(s2);
      fprintf(stdout, "%d\n", i);
   }

   return 0;
}