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Question

Define a structure, student, to store the following data about a student:
rollno (int), name (string) and marks (int)
Suppose that the class has 20 students. Use an array of 20 elements of type Student. Create a function to read the students’ data into the array. Your program should be menu driven that contains the following options :

• Print all students details
• Search student by rollno
• Print the names of the students having the highest test score.

Source Code

#include <stdio.h>

struct student
{
    int rollno;
    char name[80];
    int marks;
};

void accept(struct student[], int);
void display(struct student[], int);
void search(struct student[], int, int);
int findMax(struct student[], int);
void toppers(struct student[], int);

int main()
{
    struct student data[20];
    int n, choice, rollno;

    printf("Number of records you want to enter? : ");
    scanf("%d", &n);
    accept(data, n);
    do
    {

        printf("\nResult Menu :\n");
        printf("Press 1 to display all records.\n");
        printf("Press 2 to search a record.\n");
        printf("Press 3 to display toppers names.\n");
        printf("Press 0 to exit\n");
        printf("\nEnter choice(0-3) : ");
        scanf("%d", &choice);
        switch (choice)
        {
            case 1:
                display(data, n);
                break;
            case 2:
                printf("Enter roll number to search : ");
                scanf("%d", &rollno);
                search(data, n, rollno);
                break;
            case 3:
                toppers(data, n);
        }
    }
    while (choice != 0);

    return 0;
}

void accept(struct student list[80], int s)
{
    int i;
    for (i = 0; i < s; i++)
    {
        printf("\nEnter data for Record #%d", i + 1);

        printf("\nEnter rollno : ");
        scanf("%d", &list[i].rollno);
        fflush(stdin);
        printf("Enter name : ");
        gets(list[i].name);

        printf("Enter marks : ");
        scanf("%d", &list[i].marks);
    } 
}

void display(struct student list[80], int s)
{
    int i;

    printf("\n\nRollno\tName\tMarks\n");
    for (i = 0; i < s; i++)
    {
        printf("%d\t%s\t%d\n", list[i].rollno, list[i].name, list[i].marks);
    } 
}

void search(struct student list[80], int s, int number)
{
    int i;

    for (i = 0; i < s; i++)
    {
        if (list[i].rollno == number)
        {
            printf("Rollno : %d\nName : %s\nMarks : %d\n", list[i].rollno,
                list[i].name, list[i].marks);
            return ;
        } 
    }
    printf("Record not Found\n");
}

int findMax(struct student list[], int s)
{
    int i, max;

    max = list[0].marks;
    for (i = 1; i < s; i++)
    {
        if (list[i].marks > max)
        {
            max = list[i].marks;
        } 
    }
    return max;
}

void toppers(struct student list[], int s)
{
    int i;
    for (i = 0; i < s; i++)
    {
        if (list[i].marks == findMax(list, s))
        {
            printf("%s\n", list[i].name);
        } 
    }
}

Output