Student Grade Database

A lightweight, command-line C program designed to manage student records for a small class. This application allows users to store student names, record grades for three subjects (Math, Science, English), and calculate averages automatically.

📋 Features

• Add Student Records: Input a student's name and grades for three subjects.

• Includes input validation to ensure grades are between 0-100.

• View Database: Display a formatted table of all students, including:

• Calculated Grade Average.

• Pass/Fail remarks (Passing grade: 75.0).

• Delete Records: Remove a student by their ID number.

• Automatically re-indexes remaining students to keep IDs consecutive.

• Capacity Management: Prevents overflow by respecting a defined class limit (default: 5 students).

🛠️ Getting Started

Prerequisites

• A C compiler (GCC, Clang, or MSVC).
• Operating System: This program is currently optimized for Windows (uses cls and pause commands).
• Linux/macOS users: See the Portability Note below.

Compilation

Open your terminal or command prompt and run:

gcc grade_database.c -o grade_db

Running the Program

./grade_db

🎮 Usage Guide

Upon launching, you will be presented with the main menu:

1. Add Student:

• Enter the student's name (max 49 characters).
• Enter three integer grades separated by spaces (e.g., 85 90 88).

2. View Database:

• Shows the "Student Records" table.
• Check here to find a Student's ID number.

3. Remove Student:

• Enter the ID number found in the "View Database" screen to delete that record.

4. Exit:

• Closes the application.
• Note: All data is stored in RAM and will be lost upon exiting.

⚙️ Configuration

You can adjust the database limits by modifying the preprocessor constants at the top of the source file:

// Change the maximum number of students
#define CLASS_SIZE 5

// Change the maximum length of a student's name
#define NAME_SIZE 50

🐧 Portability Note (Linux/macOS)

This code uses Windows-specific system commands (cls and pause). To compile on Linux or macOS, modify the following lines in the source code:

1. Replace system("cls"); with system("clear");
2. Replace system("pause"); with getchar(); (or remove it entirely).

📝 License

This project is open-source and available for educational use.