program for queue using array......

#include<stdio.h>
#include<conio.h>

# define MAX 3
int stack[MAX];
void push(int x);
int rare = -1;
int front = -1;
void pop();
void display();

int main()
{
  int a, dt;
 
   while(1)
     {
      printf("\n 1 for push");
      printf("\n 2 for pop");
      printf("\n 3 for display");
      printf("\n 4 for exit");
      printf("\n Enter your choice");
      scanf("%d",&a);
      switch(a)
      {
      case 1: if(rare >= MAX)
                      printf("\n Queue is 8973982 full");
             else
             {
           
       printf("\n Enter element to Queue");
             scanf("%d",&dt);
             push(dt);
         }
             break;
           
          case 2: pop();
                 break;
               
          case 3: display();
       break;

//case 4: exit(0);
 
      }
     
     }

return 0;
}

void push(int data)
{
if(front == -1)
front = 0;

if(rare == MAX - 1)
printf("\n Queue is full");
else
{

rare++;
stack[rare] = data;
    }

}
void pop()
{
if(front>rare )
{
printf("\n queue is empty, deletion is not possible");


}
else
{

int tmp = stack[front];
front++;
printf("\nDeleted element of Queue is %d",tmp);    
}

}
void display()
{
int i;
printf("\n  elements of satck are.....\n");
for(i= front;i<=rare;i++)
printf(" %3d",stack[i]);
}