Student Management System (Sample Project)

#include <stdio.h>

struct school {
    char name[40];
    int roll;
    double marks;
};

struct school student[50];
int number = 0;

void insert() {
    printf("Enter student's number:\n");
    scanf("%d", &number);

    for (int i = 0; i < number; i++) {
        printf("Enter student's name:\n");
        fflush(stdin);
        gets(student[i].name);
        fflush(stdout);
        printf("Enter student's roll\n");
        scanf("%d", &student[i].roll);
        printf("Enter student's marks:\n");
        scanf("%lf", &student[i].marks);
    }
}

void display() {
    if(number == 0) {
        printf("Please insert the value first!\n");
    } else {
        for (int i = 0; i < number; i++) {
            printf("Name: %s\n", student[i].name);
            printf("Roll: %d\n", student[i].roll);
            printf("Marks: %.2lf\n\n", student[i].marks);
        }
    }
}

void search() {
    if(number == 0) {
        printf("Please insert the value first!\n");
    } else {
        int value, flag = 1;
        printf("Enter the roll number\n");
        scanf("%d", &value);

        // Search Operation
        for (int i = 0; i < number; i++) {
            if(value == student[i].roll) {
                printf("Name: %s\n", student[i].name);
                printf("Roll: %d\n", student[i].roll);
                printf("Marks: %.2lf\n", student[i].marks);
                flag = 0;
            }
        }

        if(flag == 1) {
            printf("Roll number doesn't exist\n");
        }
    }
}


int main() {
    printf("Welcome to our project!\n");

    while(1) {
        printf("Main Menu:\n");
        printf("1. Insert\n");
        printf("2. Display\n");
        printf("3. Search\n");
        printf("4. Exit\n");
        int choise;
        printf("Enter your choise:\n");
        scanf("%d", &choise);
        if(choise == 1) {
            insert();
        } else if (choise == 2) {
            display();
        } else if (choise == 3) {
            search();
        } else if (choise == 4) {
            break;
        } else {
            printf("\nWrong Input\nYou have to choose between 1 - 3\n\n");
        }
    }
}

/*
    Project Submission Date:

    Structure
        -> insert
        -> query
        -> update
        -> delete (optional)
    File -> (optional) // (Bonus!)
*/