Bank System (C++)

This is a C++ project I made to practice object-oriented programming (OOP) and to build something a bit more complete. The program simulates a simple bank system where you can create accounts, deposit and withdraw money, transfer funds, and apply interest. I put extra effort into this one to really understand how to organize a bigger project.

Features

• Create accounts with initial balances and interest rates.
• Perform deposits, withdrawals, and transfers (e.g., $2000 from "1010" to "1012").
• Track transaction histories using vectors.
• Apply interest to savings accounts (2% for #1010, 9% for #1012).

Purpose

I made this project to get better at using classes, vectors, and OOP ideas in C++. I wanted to see if I could put together a small system that feels more like a real application, and learn how to manage more code and features.

How to Run

This project uses CMake build system generator for easy, cross-platform compilation. Follow these steps from the root directory of the project BankSystem/

1. Ensure CMake is installed:

• Make sure you have CMake (version 3.1- or higher please) and a C++ compiler (g++ or clang++) installed on your system.

2. Generate the build system (configure):

• Create a separated directory for the build files and run CMake inside it. Keeping source files clean

mkdir build
cd build
cmake ..

3. Build:

• Use generated build system (make on Unix-like systems) to compile the executable.

make

4. Run the program:

• The executable (BankSystem) will be placed inside the build directory.

./BankSystem

IMPORTANT: Note for windows users:

• Windows developers have two ways to build the project using CMake.
  • Command line (MSYS2/Cygwin): If you use an environment like MSYS2 or WLS (Windows Subsystem for Linux), you can follow the Standard Build steps above exactly.
  • Visual Studio: CMake can generate a Visual Studio solution. Run CMake from your developer command prompt, specify the generator:

cmake .. -G "Visual Studio 17 2022"

Then, open the generated .sln file and build within Visual Studio IDE.

Sample Output

Account Creation

• Account #1010 created with balance: $5000.00, Interest rate: 2%
• Account #1012 created with balance: $3000.00, Interest rate: 9%

Transactions

• Deposit to #1010: $1000.00

• New balance for #1010: $6000.00

• Withdrawal from #1012: $500.00

• New balance for #1012: $2500.00

• Transfer from #1010 to #1012: $2000.00

• New balance for #1010: $4000.00

• New balance for #1012: $4500.00

Interest Application

• Applying interest for #1010 (2%): $80.00 -New balance for #1010: $4080.00

• Applying interest for #1012 (9%): $405.00 -New balance for #1012: $4905.00

Transaction History Screenshot

What I Learned

• How to use classes and private data to keep things organized and safe.
• How to use vectors to store lists of transactions that can grow as needed.
• How to use inheritance and virtual methods for different types of accounts or actions.
• How to split code into different files and keep things tidy with src/ and include/ folders.
• How to build a project that feels more like a real-world application, not just a small example.

Author

Rodrigo Casio
My GitHub Profile