🏦 ATM Management System (C++ OOP Project)

Developer: Ruhan Ahsan Sarnav
Department: Computer Science and Engineering (CSE)
Institution: Khulna University of Engineering and Technology (KUET)

---

📖 Project Overview

This is a console-based ATM Management System implemented in C++ using Object-Oriented Programming (OOP).
It simulates real-world ATM functionalities including deposits, withdrawals, fund transfers, and account details display.

The project demonstrates core OOP concepts such as classes, objects, encapsulation, constructors, and friend functions.

---

✨ Key Features

• 💰 Deposit: Add money to an account.
• 🏦 Withdraw: Withdraw money with balance validation.
• 🔄 Transfer Money: Transfer funds between two accounts.
• 📄 User Details: Display account information for all users.
• 📊 Transaction Tracking: Track transactions using a class-based design.

---

💡 Core Concepts Used

• Classes and Objects
• Encapsulation & Data Hiding
• Friend Functions and Friend Classes
• Constructor Initialization
• Composition (ATM contains Bank and Account objects)
• Menu-driven Program Flow

---

🛠 Implemented Classes

1. Transaction – Stores transaction details (ID, type, amount).
2. Bank – Manages bank-level balance and withdrawals.
3. Account – Stores account number, holder name, and balance.
4. ATM – Integrates all components and provides a user interface.

---

🚀 How to Run

1. Open the project in a C++ compiler (e.g., Code::Blocks, Dev-C++, VS Code).
2. Compile the code:

   g++ atm.cpp -o atm
   
   
   
   

Run the executable:

  ./atm

Follow the on-screen menu to perform transactions.

---- ATM Menu ----

1. Deposit
2. Withdraw
3. Transfer Money
4. Display User Details
5. Exit Choose an option: 1 Enter the amount to deposit: 5000 Deposit successful. Current balance: 5000