#include "queue.h"


void instructions() {

  printf("To use the queue\n");
  printf("1: enqueue a value\n");
  printf("2: dequeue a value\n");
  printf("3: prints content of queue\n");
  printf("4: exits\n");

}


int main() {

  Node *head = NULL;
  Node *tail = NULL;

  int choice;
  int value;

  instructions();

  printf("> ");
  scanf("%d",&choice);

  while ( choice != 4 ) {

    switch ( choice ) {

    case 1:
      printf("Enter int: ");
      scanf("%d",&value);
      enqueue(&head,&tail,value);
      break;

    case 2:
      if ( is_empty(head) ) {
	printf("Empty\n");
      } else {
	value = dequeue(&head,&tail);
	printf("Dequeued: %d\n",value);      
      }
      break;

    case 3:
      print(head);
      break;
      
    default:
      instructions();
      break;
    }

    printf("> ");
    scanf("%d",&choice);
    
  }

  return 0;
}