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Ticket window - Program Using Queue

Ticket window - Program Using Queue

#include <iostream.h>
#include <conio.h>
#include <process.h>

class ticketqueue{
private:
   //Data Members
		 int q[5];
		 int front, rear, noe;  //noe..to store number of elements

public:
   //Member Functions
		 ticketqueue(){ noe = rear = front = 0;} //Constructor
		 void enqueue(int);
		 void ticketchecker();
		 void print();
		 int isempty();
		 void queuebuilder();
		 void menu();
};
/////////////////////
void ticketqueue :: enqueue(int a)
{
		 		 q[rear] = a;
		 		 rear++;
		 		 noe++;
		 		 if (rear == 5)
		 		 		 rear = 0;
		 		 cout<<"
"<<a<<" Is Enqeueued....."<<endl;
}
/////////////////////
void ticketqueue :: 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. 2 Tickets are
given.
"
		 		 		 		 		 		 		  <<"
Enqueued again for next go to get remaining #"<<rt<<"
Tickets"<<endl;
		 		 		 		 		 		 }
		 		 		 		 		 else if ( rt <= 0 )
		 		 		 		 		 		 front++;
		 		 		 		 		 		 noe--;

		 		 		 		 }
		 		 		 else if ( not <= 2 )
		 		 		 		   {
		 		 		 		 		  front++;
		 		 		 		 		  noe--;
		 		 		 		 		 cout<<"
"<<not<<"# tickets are given...."<<endl;
		 		 		 		   }
		 		 		 }
		 else
		 		 cout<<"
!!! NO REQUEST IN THE QUEUE " <<endl;

getch();
clrscr();
menu();
}
/////////////////////
void ticketqueue :: print()
{
clrscr();
		 int i = front;
		 if ( noe > 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();
menu();
}
//////////////////

//Utility Fuction
int ticketqueue :: isempty()
{
		 if ( noe == 0 )
		 		 return 1;
		 else
		 		 return 0;
}
/////////////////

//This Function takes input from the user and shows Queue graphically

void ticketqueue::queuebuilder(){
   clrscr();
   int tickets, z = 0, i = 0, x = 20, y = 10, g = 1, h = 17;
   char c;
   cout<<"Enter number of tickets to purchase... "<<endl;
   while (!(c == 'E' || c == 'e'))
		 {
		 		  if ( z > 4)
		 		 		 {
		 		 		 		 clrscr();
		 		 		 		 cout<<" 

 ERROR!!! Queue Size Violation...Exiting Now  "<<endl;
		 		 		 		 getch();
		 		 		 		 clrscr();
		 		 		 menu();
		 		 		 }

		 		  else
		 		 		 {
		 		 		 		 cout<<"
Enter : ";
		 		 		 		 cin>>tickets;
		 		 		 		 enqueue(tickets);
		 		 		 		 z++;
		 		 		 		 gotoxy(17,10);
		 		 		 		 cout<<"->";
		 		 		 		 gotoxy(20,9);
		 		 		 		 cout<<"----------------------------------";
		 		 		 		 gotoxy(x,y);
		 		 		 		 cout<<q[i];
		 		 		 		 x+=2;
		 		 		 		 gotoxy(20,11);
		 		 		 		 cout<<"----------------------------------";
		 		 		 		 gotoxy(g,h);
		 		 		 		 cout<<"PRESS C/c to CONTINUE E/e to END: ";
		 		 		 		 cin>>c;
		 		 		 		 h += 6;

		 		 		 		 i++;
		 		 		 }
		 }
getch();
clrscr();
menu();
}
//////////////////
void ticketqueue::menu()
{
int b;
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(15,15);
		 cout<<"Press 4................EXIT
";
gotoxy(15,18);
		 cout<<"NOW ENTER : ";

		 cin>>b;

if ( b == 1 )
		 queuebuilder();
else if ( b == 2 )
		 ticketchecker();
else if ( b == 3 )
		 print();
else if ( b == 4 )
		 exit(1);
}
//////////////////


void main()
{
clrscr();
ticketqueue t;
t.menu();
getch();
}