#include<iostream.h>

int counter=0;

void enqueue(int myqueue[], int &rear, int item){

      myqueue[rear]=item;

      rear++;

      counter++;}//ENQUEUE

int dequeue(int myqueue[], int &front){

      int item;

      item=myqueue[front];

      front++;

      counter--;

      return item;}//DEQUENUE

int isempty(){

      if(counter==0) return 1;

      else return 0;}//ISEMPTY

int isfull(const int MAXSIZE){

      if(counter==MAXSIZE) return 1;

      else return 0;}//ISFULL

void main(){

      const int MAXSIZE=10;

      int myqueue[MAXSIZE]; int front=0, rear=0, item, option; //

      do{ cout<<"SELECT ONE OF THE FOLLOWING OPTIONS: "<<endl;

      cout<<"1-ENQUEUE 2-DEQUEUE 3-ISEMPTY 4-ISFULL 5-QUIT: ";

      cin>>option;

      switch(option){

            case 1: cout<<"ENTER THE NUMBER: ";

                              cin>>item;

                              if(!isfull(MAXSIZE))enqueue(myqueue, rear, item);

                              else cout<<"YOU CAN'T ENQUEUE"<<endl;

                              break;

            case 2: if(!isempty())cout<<"THE NUMBER DEQUEUE IS: "<<dequeue(myqueue, front)<<endl;

                        else cout<<"YOU CAN'T DEQUEUE"<<endl;

                        break;

            case 3: if(isempty())

                              cout<<"QUEUE EMPTY."<<endl;

                        else cout<<"QUEUE IS NOT EMPTY."<<endl;

                        break;

            case 4: if (isfull(MAXSIZE)==1)

                              cout<<"QUEUE FULL."<<endl;

                        else cout<<"QUEUE IS NOT FULL."<<endl;

                        break;

            case 5: cout<<"THANK YOU FOR USING OUR MENU!"<<endl;

                  break;

            default: cout<<"ENTER CORRECT OPTIONS"<<endl;}//SWITCH

      }while(option !=5);

}//MAIN