Banking System (C++ OOP Project)

// Copyright (c) 2025 Anas Ali Chafai. All rights reserved.
// Contact: anaschafai04@gmail.com

A fully-featured Banking System built with Object-Oriented Programming (OOP) in C++.
The project simulates real-world banking operations, focusing on clean architecture, data validation, and modular design.
It is entirely console-based and demonstrates practical usage of classes, inheritance, file I/O, enums, and validations.

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Key Features

💼 Client Management

• Add new clients with account details.
• Update, search, and delete clients.
• Display all clients in a formatted list.
• Validate inputs (account number, phone, PIN, balance, etc.).

💰 Transactions

• Deposit and withdraw with balance checks.
• Transfer money between accounts.
• Transaction logging and total balance overview.
• Validations to prevent overdrafts or invalid operations.

👥 User Management & Security

• User accounts with permissions (bitmask-based).
• Add, update, delete users.
• Login and registration system.
• Admin vs normal user access levels.

💱 Currency Exchange

• List currencies and their current exchange rates.
• Update currency rates.
• Perform conversions with accurate calculations.

⚙️ System Design Highlights

• Object-Oriented Approach: Classes like clsBankClient, clsUser, clsCurrency, and clsPerson implement encapsulation and inheritance.
• Input Validation: All inputs are verified (numbers, strings, account numbers).
• File-Based Persistence: Data stored in Bank.txt, Users.txt, and TransferLog.txt (no database required).
• Modular Screens: Each feature (client, user, currency, transactions) has its own screen class for separation of concerns.
• Utilities: Helper classes for string handling, dates, and validation (clsDate, clsUtil, clsInputValidate).

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📂 Project Structure

Banking-System/
├── Core/                    # Core classes
│   ├── clsBankClient.h      # Client management
│   ├── clsCurrency.h        # Currency operations
│   ├── clsPerson.h          # Base person class
│   ├── clsUser.h            # User management
│   └── clsDate.h            # Date handling
├── Screens/                 # UI screens
│   ├── Client/              # Client operations
│   ├── Currencies/          # Currency exchange
│   ├── User/                # User management
│   └── LoginRegister.h      # Authentication
├── Source Files/
│   └── C11v2.cpp             # Application entry point
└── Data Files/              # Storage files
    ├── Bank.txt             # Client records
    ├── Users.txt            # User login and permissions
    ├── TransferLog.txt      # Logs of account transfers
    ├── Currencies.txt       # Currency exchange rates (e.g., France#//#EUR#//#Euro#//#0.900000)
    └── LoginLog.txt         # Login history with timestamp and details

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📝 Data Files

• Client.txt → Stores client records:

• Users.txt → Stores user login and permissions:

• TransferLog.txt → Logs account transfers with details.

• Currencies.txt → Stores currency data (for exchange module)

• LoginRegister.txt → Logs all login attempts

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🏛️ Architecture

This project is inspired by the 3-Tier Architecture design:

• Presentation Layer (Screens/) → Handles the console UI and user interaction.
• Business Logic Layer (Core/) → Contains the core classes and validation logic (OOP principles applied).
• Data Layer (Data Files/) → Text files (Bank.txt, Users.txt, TransferLog.txt, etc.) that store application data.

Even though it's a console application, I tried to structure it in a way that follows the 3-tier separation of concerns.

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How to Run

1. Clone this repository.
2. Open the project in Visual Studio 2022 (recommended).
3. Build the solution.
4. Make sure the Data Files/ folder contains Bank.txt and Users.txt before running.
5. Run from console to explore all features.

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Learning Outcomes

This project is a strong practice in:

• Applying OOP principles (inheritance, encapsulation, modularity).
• Handling file-based storage in C++.
• Designing validations and error handling in console applications.
• Building scalable console apps with multiple modules and features.

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Anas Ali Chafai
Algiers, Algeria
📩 anaschafai04@gmail.com