Queue Data Structure in C

test_queue.c

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

int main(int argc, char const *argv[])
{
  int head,tail,element;

  int queue[4];

  init(&head,&tail);

  element=rand();
  push(queue,&tail,element);

  element=rand();
  push(queue,&tail,element);

  element=rand();
  push(queue,&tail,element);

  element=rand();
  push(queue,&tail,element);

  printf("Dequeue element: %d\n", pop(queue,&head));
  printf("Dequeue element: %d\n", pop(queue,&head));
  printf("Dequeue element: %d\n", pop(queue,&head));
  printf("Dequeue element: %d\n", pop(queue,&head));

  return 0;
}