Employee Performance Management System

A robust command-line Employee Performance Management System written in C, designed to manage employee records with features such as real-time CRUD operations, performance-based sorting, dynamic memory management, and persistent binary file storage.

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Features

• Modular CRUD Operations
  Add, update, and delete employee records seamlessly via an intuitive command-line interface.

• Dynamic Data Management
  Handles growing datasets efficiently using dynamic memory allocation (malloc, realloc, free) — tested with over 1,000 entries.

• Performance Scoring System
  Calculates and ranks employee performance using a customizable algorithm based on salary and years of experience.

• Persistent Binary File Storage
  Saves and loads employee records to/from a binary file (employees.dat) using fwrite() and fread() to preserve data across sessions.

• Enhanced Search & Display
  Quickly search for employees by name (case-insensitive) and list all employees sorted by performance score for performance insights.

• Robust Input Handling
  Implements input validation and clears input buffers to prevent invalid entries and buffer overflows.

• User Confirmation on Destructive Actions
  Adds a safety prompt before critical actions like record deletions to avoid unintended data loss.

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Data Storage

• Employee records are stored in a binary file named employees.dat.
• The program automatically loads this file at startup and writes to it upon exiting, ensuring data persistence across sessions.

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Structure

• main() manages the main program loop and user interaction.
• Functional decomposition is used to separate:
  • CRUD operations
  • File I/O logic
  • Sorting and searching
• The system dynamically expands or shrinks the employee array as needed to accommodate the current number of records.

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Technologies Used

• Language: C
• Concepts: Dynamic Memory Management, File I/O, CLI UI, Algorithm Design
• Tools: GCC Compiler, Linux Terminal (or Windows Subsystem for Linux)

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Compile and Run

gcc -o employee_manager main.c
./employee_manager