Bank Account Management System

A simple C++ implementation of a bank account management system demonstrating object-oriented programming principles including inheritance and polymorphism.

Overview

This project implements a basic banking system with features for depositing, withdrawing, and managing account information. It uses an abstract base class BankAccount with a concrete implementation in MyBankAccount to showcase inheritance and virtual functions in C++.

Features

• Deposit Money: Add funds to your account (with validation for positive amounts)
• Withdraw Money: Remove funds from your account with balance verification
• View Account Information: Display current account details including name and balance
• Change PIN: Update your account PIN for security
• User Authentication: Simple PIN-based authentication for account operations

Project Structure

• main.cpp - Contains all source code including the abstract base class, derived class, and main program logic
• run.sh - Build and run script for the project

Building and Running

On Linux/macOS:

bash run.sh

On Windows:

g++ main.cpp -o a.exe
.\a.exe

Or manually:

g++ main.cpp -o a.exe
./a.exe

Usage

1. Start the program and enter your credentials:

   • Name: Ngong (default account name)
   • PIN: p (default account PIN)

2. Select an option from the menu:

   • 1) Deposit - Enter amount to add to your account
   • 2) Withdrawal - Enter amount to withdraw from your account
   • 3) See Information - View your account details
   • 4) Change Pin - Update your PIN
   • 0) Exit - Exit the program

Default Account Credentials

• Name: Ngong
• PIN: p
• Initial Balance: 0

Class Design

BankAccount (Abstract Base Class)

• Public Members:
  • name: Account holder's name
  • pin: Account PIN
• Private Members:
  • amount: Account balance
• Virtual Methods:
  • deposit(): Add funds to account
  • withdraw(): Remove funds from account
  • displayInfo(): Show account information
  • changePin(): Update account PIN

MyBankAccount (Derived Class)

Implements all virtual methods from the base class with the following business logic:

• Validates user credentials before any operation
• Ensures deposit and withdrawal amounts are positive
• Checks for sufficient balance before withdrawal
• Updates PIN only when old PIN matches

Validation Rules

• Deposit: Amount must be greater than 0
• Withdrawal: Amount must be greater than 0 and cannot exceed current balance
• All Operations: Name and PIN must match account credentials

Error Messages

• "You are too poor" - Attempt to deposit or withdraw negative/zero amount
• "User name and pin code do not match" - Invalid credentials
• "Insufficient Balance" - Attempt to withdraw more than available balance

Requirements

• C++ compiler (GCC/G++ recommended)
• Standard C++ library support

Notes

• This is a basic implementation for educational purposes
• Uses simple string comparison for authentication (not secure for production)
• Balance is stored as an integer (assumes currency in whole units)
• Session-based: Changes persist only during program execution