Address Book Management System

A command-line Address Book Management System built with C. It allows users to create, search, edit, delete, and display contacts through a simple menu-driven interface. Contact information is stored in a CSV file so it can be loaded again when the program starts.

Features

• Create contacts with a name, phone number, and email address.
• Search for contacts by name, phone number, or email address.
• Edit existing contact details.
• Delete contacts.
• Display all saved contacts in a formatted table.
• Validate user input and check for duplicate phone numbers and email addresses.
• Load contacts from and save contacts to addressBook.csv.

Input Validation

• Names must begin with an alphabetic character.
• Phone numbers must contain exactly 10 digits and start with a digit from 6 to 9.
• Email addresses are converted to lowercase, must begin with an alphabetic character, and must end in .com.
• Phone numbers and email addresses must be unique.

Screenshots

Main Menu

Contact List

Project Structure

AddressBook/
├── main.c              # Application entry point and main menu
├── contact.c           # Create, search, edit, delete, and list contacts
├── contact.h           # Contact structures and declarations
├── utils.c             # Input validation and helper functions
├── utils.h             # Utility function declarations
├── file.c              # CSV file loading and saving
├── file.h              # File-handling declarations
├── addressBook.csv     # Contact data
|__ LICENSE             # License 
|
├── tests/
│   └── test_utils.c    # Unit tests
├── .github/
│   └── workflows/
│       └── build.yml   # GitHub Actions CI workflow
└── screenshots/        # Project interface screenshots

Requirements

• GCC compiler (or another C compiler)
• Terminal or command prompt

Build and Run

Clone the repository:

git clone https://github.com/adwaithjayan/AddressBook.git
cd AddressBook

Linux

Compile:

gcc -Wall -Wextra -std=c11 main.c contact.c utils.c file.c -o addressbook

Run:

./addressbook

Windows

Compile:

gcc -Wall -Wextra -std=c11 main.c contact.c utils.c file.c -o addressbook.exe

Run:

.\addressbook.exe

Run the program from the project directory so it can access addressBook.csv. Select Save and Exit from the menu to save the contact data.

Data Storage

Contacts are stored in addressBook.csv. The application loads the saved contacts when it starts and writes the contact data back to the file when you choose Save and Exit.

Concepts Used

• Structures and arrays
• Functions and modular programming
• String handling
• Input validation
• Searching, editing, and deleting records
• File handling using standard C file I/O

Testing

The project includes automated unit tests for input validation and duplicate checking.

Tests are executed automatically through GitHub Actions on both Windows and Linux.

Downloads

Download the latest version from GitHub Releases.

Latest Release: v1.0.0

Platform	Download
Windows	Download executable
Linux	Download executable

For source code and previous versions, visit the Releases page.

Author

Adwaith jayan