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Queue Line Management System (C++)

A simple Queue Line Management System implemented in C++ using Object-Oriented Programming and the Standard Template Library (STL).

The program simulates real-world service queues such as bill payment counters or subscription services, where clients receive tickets and are served in order.

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Features

• Issue new tickets for clients

• Track waiting clients

• Track served clients

• Display queue information

• Show next client to be served

• Print all issued tickets

• Display tickets in:

  • Right → Left order
  • Left → Right order

• Calculate expected service time for each ticket

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Technologies Used

• C++

• STL Containers

  • queue
  • stack

• Object-Oriented Programming

• Custom utility classes:

  • clsDate
  • clsInputValidation

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Project Structure

cpp-queue-line-system
│
├── clsQueueLine.sln
├── .gitignore
│
├── clsQueueLine
│   ├── clsQueueLine.cpp
│   ├── clsQueueLine.h
│   ├── clsDate.h
│   ├── clsInputValidation.h
│   ├── clsString.h
│   └── clsQueueLine.vcxproj

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How It Works

1. Each queue has a prefix (example: A0, B0).
2. When a client arrives, a ticket is issued.
3. The system stores the ticket in a queue.
4. Clients are served in First-In-First-Out (FIFO) order.
5. The expected waiting time is calculated using:

Expected Serve Time = Waiting Clients × Average Serve Time

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Example Output

Pay Bills Queue Info

Prefix = A0
Total Tickets = 5
Served Clients = 0
Waiting Clients = 5

Tickets: A01 <-- A02 <-- A03 <-- A04 <-- A05

Each ticket displays:

_______________________

      A03

  2026-03-07 19:10:25

  Waiting Clients = 2
  Serve Time In 20 Minutes

_______________________

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Concepts Practiced

This project demonstrates:

• Queue data structure
• Stack usage for reversing order
• Object-Oriented Programming
• Encapsulation
• STL container manipulation
• Simulation of real-world queue systems

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