Student Record System in C

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX_STUDENTS 100

// Structure to represent a student
struct Student {
    int id;
    char name[100];
    float grade;
};

// Function to add a new student
void addStudent(struct Student students[], int *studentCount) {
    if (*studentCount >= MAX_STUDENTS) {
        printf("Student database is full. Cannot add more students.\n");
        return;
    }

    struct Student newStudent;

    printf("Enter Student ID: ");
    scanf("%d", &newStudent.id);

    printf("Enter Student Name: ");
    scanf("%s", newStudent.name);

    printf("Enter Student Grade: ");
    scanf("%f", &newStudent.grade);

    students[*studentCount] = newStudent;
    (*studentCount)++;

    printf("Student added successfully.\n");
}

// Function to display all students
void displayStudents(struct Student students[], int studentCount) {
    if (studentCount == 0) {
        printf("No students to display.\n");
        return;
    }

    printf("ID\tName\tGrade\n");
    for (int i = 0; i < studentCount; i++) {
        printf("%d\t%s\t%.2f\n", students[i].id, students[i].name, students[i].grade);
    }
}

int main() {
    struct Student students[MAX_STUDENTS];
    int studentCount = 0;
    int choice;

    while (1) {
        printf("\nStudent Record System Menu:\n");
        printf("1. Add Student\n");
        printf("2. Display Students\n");
        printf("3. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                addStudent(students, &studentCount);
                break;
            case 2:
                displayStudents(students, studentCount);
                break;
            case 3:
                exit(0);
            default:
                printf("Invalid choice. Please try again.\n");
        }
    }

    return 0;
}