HaBank Buhay ATM System in C++

A robust console-based ATM system developed in C++ that simulates essential banking operations, with all transactions handled in Philippine Pesos (₱).

This project was created in compliance with the final project requirements for CCS0015 Data Structures and Algorithm.

Features

• Secure Authentication: Log in with an encrypted 4-digit alphanumeric PIN for secure account access.
• Core Banking: Perform deposits, withdrawals, and check your balance.
• Comprehensive Transaction Logging: A detailed history of all account activities is maintained with unique reference IDs.
• Bills & Transfers: Conveniently pay bills and send money via internal transfers to other users.
• Currency Conversion: View your balance converted to USD, JPY, SKW, or INR.
• Loan Services: Apply for and manage loans with a built-in simple interest calculator and payment functionality.
• Data Persistence: All user data and transaction logs are securely saved and loaded using CSV files.
• Organized User Data: Each user's data is neatly stored in a dedicated data/[userID] folder.- Secure Authentication: Log in with an encrypted PIN (4-digit, alphanumeric) for secure access to your account.

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Folder Structure

|- data/
|- |- accounts.csv
|- |- ref.txt
|- |- uid-counter.txt
|- |- [userID]/
| |- [userID]-data.csv
| |- [userID]-log.csv
|- bank.cpp
|- bank.h
|- main.cpp
|- utility.h

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Contributors

• Verceles
• Enriquez
• Coo
• Grutas
• Sinang

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Build Instructions

To compile and run the ATM system, navigate to the project's root directory in your terminal and execute the following commands.

# For Linux/macOS
g++ -std=c++17 -o atm main.cpp bank.cpp

# For Windows (using MinGW)
g++ -std=c++17 -o atm.exe main.cpp bank.cpp
./atm.exe

Note: This project requires a C++17-compatible compiler (e.g., g++).

Notes

• userID format: ####-####, auto-generated and stored in uid-counter.txt
• Logs are saved in [userID]-log.csv and include transaction type, amount, and recipient info
• PINs are encrypted using a Caesar cipher-like shift

Sample Test Scenarios

• Account Creation: Create a new account and set a PIN (e.g., 1234).
• Basic Transactions: Deposit funds (e.g., ₱1000) and then make a withdrawal (e.g., ₱500).
• Bill Payment: Pay a hypothetical bill (e.g., "Electricity" for ₱300).
• Fund Transfer: Transfer money to another user's account.
• View History: Check your transaction log and explore currency-converted balances (e.g., in USD, JPY, SKW, INR).
• Loan Management: Apply for a loan, observe the terms, and make a payment.
• Data Inspection: Verify the generated user data and log files within the data/ directory.