#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include "c:queue.h"

int menu(void);
void pause(void);

main()
{  Q_TYPE queue;
   ITEM_TYPE item;
   int i, n, choice;

   CreateQueue(&queue);
   do
   {  choice = menu();
      
      switch(choice)
      {
       case 1 : clrscr();
	       printf("Enter the number of nodes you wish to add in the queue: ");
	       scanf("%d" , &n);
	       for(i=1 ; i <= n ; i++)
	       {
	           clrscr();
	           printf("Enter item for node# %d : " , i);
		   scanf("%d", &item);
                   if (!FullQueue())
		      Enqueue(&queue,item);
		}
                pause();
	        break;
	       
       case 2 : clrscr();
	        printf("Enter item for the node: " );
		scanf("%d", &item);
                if (!FullQueue())
	            Enqueue(&queue, item);
		pause();
	        break;
	       
       case 3 : clrscr();
		printf("Sorry! You need to implement this yourself\n");
		pause();
	        break;
	       
       case 4 : clrscr();
	        if (EmptyQueue(&queue))
	           printf("Sorry, the queue is empty\n");
                else
		{  Dequeue(&queue,&item);
   	           printf("The deleted value is:  %d\n ", item);
                }
		pause();
		break;
		
       case 5 : DestroyQueue(&queue);
		
     } 
   } while (choice != 5);

   return 0;
 }


  int menu(void)
  { int choice, stat;
    do
    {
      clrscr();
      printf("\n\n\n\t\t1. Create a queue\n");
      printf("\t\t2. Insert new node to queue\n");
      printf("\t\t3. Display the queue\n");
      printf("\t\t4. Delete node from queue\n");
      printf("\t\t5. Exit\n\n");
      printf("\t\tPlease, enter your choice: ");
      stat=scanf("%d", &choice);
     } while(stat==0 || choice < 1 || choice > 5);
    return choice;
  }

  void pause(void)
  {
    printf("\nPress any key to continue...");
    getch() ;
  }