Ticket window - Program Using Queue

/*Ticket window - Program Using Queue
compiler- Turbo c++     author- Mangilal Sharma
--------------------------------------------------------*/
#include <iostream.h>
#include <conio.h>
#include <stdlib.h>

class ticket
{
 private:
 int q[5];
 int front, rear, n;  //n..to store number of elements
 public:
 void enqueue(int);
 void ticketchecker();
 void print();
 int isempty();
 void queuebuilder();
 ticket();
};

void ticket::enqueue(int a)
{
 q[rear] = a;
 rear++;
 n++;
 if (rear == 5)
 rear = 0;
 cout<<""<<a<<" Is Enqeueued....."<<endl;
}

void ticket::ticketchecker()
{
 clrscr();
 int not,rt;
 if ( !isempty() )
 {
  not = q[front];
  if (not > 2)
  {
   rt = not - 2;
   if ( rt > 0 )
   {
    enqueue(rt);
    front++;
    cout<<""<<not<<"# Tickets were demanded. \n2 Tickets aregiven.\nEnqueued again for next go to get remaining #"<<rt<<"Tickets"<<endl;
   }
   else if ( rt <= 0 )
   front++;
   n--;
  }
  else if ( not <= 2 )
  {
   front++;
   n--;
   cout<<""<<not<<"# tickets are given...."<<endl;
  }
 }
 else
 cout<<"!!! NO REQUEST IN THE QUEUE " <<endl;
 getch();
 clrscr();
 return;
}

void ticket::print()
{
 clrscr();
 int i = front;
 if ( n > 0 )
 {
  cout<<"REQUESTS ENQUEUED ARE :" ;
  do
  {
   cout<<q[i]<<"  ";
   i++;
   if ( i == 5 )
   i = 0;
  }
  while ( i != rear );
 }
 else
 cout<<"NO REQUEST IN QUEUE...QUEUE IS EMPTY ";
 getch();
 clrscr();
 return;
}

int ticket :: isempty()
{
 if ( n == 0 )
 return 1;
 else
 return 0;
}

//This Function takes input from the user and shows Queue graphically
void ticket::queuebuilder()
{
 int tickets, z = 0, i = 0, x = 20, y = 10, h = 17;
 char c;
 cout<<"Enter number of tickets to purchase... "<<endl;
 while (!(c == 'E' || c == 'e'))
 {
  if ( z > 4)
  {
   gotoxy(5,15);
   cout<<" ERROR!!! Queue Size Violation...Exiting Now  "<<endl;
   getch();
   clrscr();
   return;
  }
  else
  {
   cout<<"Enter : ";
   cin>>tickets;
   enqueue(tickets);
   z++;
   gotoxy(17,10);
   cout<<"->";
   gotoxy(20,9);
   cout<<"----------------------------------";
   gotoxy(x,y);
   cout<<q[i];
   x+=4;
   gotoxy(20,11);
   cout<<"----------------------------------";
   gotoxy(5,15);
   cout<<"PRESS C/c to CONTINUE E/e to END: ";
   cin>>c;
   h += 6;
   i++;
  }
  gotoxy(1,2);
 }
 return;
}

ticket::ticket()
{
 n = rear = front = 0;
 int b;
 do
 {
  clrscr();
  gotoxy(15,5);
  cout<<"Press 1................ENTER NO OF TICKETS";
  gotoxy(15,8);
  cout<<"Press 2................TICKET CHECKER";
  gotoxy(15,11);
  cout<<"Press 3................ALL TICKET REQUESTS";
  gotoxy(15,14);
  cout<<"Press 4................MAIN PAGE";
  gotoxy(15,17);
  cout<<"Press 5................EXIT FROM PROGRAM";
  gotoxy(15,20);
  cout<<"NOW ENTER : ";
  cin>>b;
  switch(b)
  {
   case 1:
clrscr();queuebuilder();break;
   case 2:
ticketchecker();break;
   case 3:
print();break;
   case 4:
return;
   case 5:
exit(1);
   default:
cout<<"\n\t\tWrong Choice, Enter Again\n";
  }
 }
 while(1);
}
/*=========================19Nov.,2010=============================*/