Banking System Simulation

This project simulates a traditional banking system combined with modern online banking features (similar to PayPal or Apple Pay). It was developed to practice and deepen knowledge in C++ and will later be extended with a GUI using Qt.

Used Technologies

1. C++ as the main programming language
2. Python for validation and auxiliary processing
3. JSON for data exchange between C++ and Python
4. SQLite as the database system

Used Libraries

1. libsodium – password hashing and encryption
2. datetime / date (Python) – date validation
3. pycountry – automatic country code lookup

Required Libraries & Tools

1. vcpkg

Used to install:

• libsodium

2. Python & pip packages

• json (built-in)
• datetime, date (built-in)
• pycountry (pip install pycountry)

3. Database Tools

• SQL connector for C/C++

Database Logic

Main Profile
└── User Account
└── Card Information
└── Card Movements & Changes

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Core Structure

System Profile
└── Account
└── Card Data
└── Card Movement (Transactions)

Main Architecture

main.cpp
└── windowsBuild.bat (build script)
└── /build (compiled .exe, Python scripts, JSON files)
└── ApplicationController.cpp (controls the entire system)
└── Login / Registration
└── Two-Factor Authentication
└── menu.cpp (central controller for all classes and functions)

File Structure

main.cpp
windowsBuild.bat
/build
├── main.exe
├── Python files
└── JSON files
/include
└── header files (.h)
/src
└── source files (.cpp)

Current Features

Core

• Account creation
• Profile creation
• Basic main menu

Planned Features

Core

• Login / Logout
• Full 2FA integration
• Database connection
• Extended main menu

Banking

• Create bank cards (Debit, Giro, Credit)
• Deposit, withdraw, transfer
• Set and edit card limits and availability
• Standing orders
• Overdraft limit management

Planned Technologies

• Full database backend
• Qt-based graphical user interface

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