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

using namespace std;

int main()
{
int queue[5];
int head = 1;
int tail = -1;
int pilihan, nilai, i;

do{
cout<<("MENU\n");
cout<<("1. Enqueue\n2. Dequeue\n3. tampilan\n4. keluar\n");
system("cls");
cout<<("Pilihan = ");
cin>>pilihan;

 switch (pilihan)
 {
 case 1:
  if (tail < 4 )
  {
        cout<<"Data Masuk = ";
        cin>>nilai;
        queue[tail+1] = nilai;
        tail++;
        if (tail == 0)
        head = 0;
      }
      else
       cout<<"Queue penuh\n";
       break;
   case 2:
        if (head <= tail)
         {
            cout<<"Data keluar = \n"<<queue[head];
            head++;
            cout<<endl;
         }
         else
           cout<<("queue kosong\n");
           break;
   case 3:
        for(i=head; i<=tail; i++)
        cout<<" data ke - "<<i<<" = "<<queue[i];
        cout<<"\n";
        break;
   }
   cout<<"--------------------------------------";
   cout<<endl;
 }
while (pilihan != 4);
}