Banking System using Linked Lists (C++)

A Data Structures university project implemented in C++ that simulates a mini banking system.

The system manages Users → Accounts → Transactions using custom linked lists and demonstrates algorithmic operations such as sorting and node deletion.

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🚀 Features

• Store multiple users
• Each user can own multiple bank accounts
• Each account maintains a linked list of transactions
• Transfer money between two accounts:
  • Checks account balance
  • Checks monthly withdraw limit (sender)
  • Checks daily deposit limit (receiver)
  • Supports currency conversion (fixed rate implemented in code)
• Sort transactions by date using Merge Sort on a linked list
• Delete transactions before a given date
• Load and save all data using a structured users.txt file format

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🧠 Data Structures & Concepts Used

• Doubly linked list for Users (head/tail + previous/next)
• Singly linked list for Accounts
• Singly linked list for Transactions
• Merge Sort for linked list (split using slow/fast pointers + merge)
• File parsing and serialization with a structured text format
• Dynamic memory management using pointers

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📂 Project Structure

src/ # C++ source files README.md .gitignore best in town.sln # Visual Studio solution file best in town.vcxproj

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⚙️ How to Run

Option 1 — Visual Studio (Recommended)

1. Open best in town.sln
2. Build and Run

Option 2 — g++ (Command Line)

From the project root:

g++ -std=c++17 src/*.cpp -o app
./app