Project Description: Phonebook Management System

The Phonebook Management System project aims to provide a user$-$friendly interface for

storing and managing contact information efficiently. This project will help students

understand the fundamentals of file handling, data validation, and basic data structures in C

programming. The system allows users to store, update, delete, and display contact records,

ensuring data validation for phone numbers and email addresses.

This project is to be completed in groups of $2$ to $3$ students at most. Each team should have a

leader, the leader responsibility is to submit the work on behalf of the team.

Provided Services:

$1.$ Add Contact: Users can add new contacts to the phonebook by providing details

including name, phone number, email address and then saved to the phonebook text

file. You must ensure that the record does not exist in the text file by checking against

contact name.

$2.$ Update Contact: Existing contacts in the text file can be updated with new information,

including phone number, email address, and name. when updating the name, you must

ensure that it does not exist in the text file.

$3.$ Delete Contact: Users can delete contacts from the phonebook text file based on the

contact's name or phone number.

$4.$ Search Contact: Users can search for contacts by name or phone number to retrieve

their details.

$5.$ Display All Contacts: The system provides an option to display all contacts stored in

the phonebook text file.

Data Validation: before saving a record to the phonebook text file, a record criteria must be

met

$1.$ Name Validation: the system must validate the contact name to ensure that only

alphabetical characters are accepted.

$2.$ Phone Number Validation: When adding or updating a contact, the system validates

the phone number to ensure that only numeric characters are accepted. It checks for

the correct format and length of the phone number is $10$ digits.

$3.$ Email Address Validation: Similarly, the system validates email addresses to ensure

they follow the correct format $($e$.$g$.,$ example@email.com$).$ It checks for the presence of

$"$@$"$ and $"."$ symbols in the email address.

Project Implementation:

The project will involve creating structures to represent contact information, implementing

functions for adding, updating, deleting, searching, and displaying contacts. Data validation

logic will be integrated into the functions for adding and updating contacts to ensure the

integrity of the stored data. File handling operations must be used to save and retrieve contact

records from a text file, providing persistence to the phonebook data. The text file format

should look like the figure below.

By completing this project, students will gain practical experience in C programming, file

handling, data validation techniques, and basic data structure manipulation. They will develop

a deeper understanding of managing data in real$-$world applications and enhance their

problem$-$solving skills.