C Array of Structures

When we need many records of the same type, we make an array of structures. It works like a small table: each element is one record.

Example: three students

#include <stdio.h>

struct Student {
    int roll;
    char name[20];
    float marks;
};

int main(void) {
    struct Student list[3] = {
        {1, "Robin", 85.5f},
        {2, "Maria", 92.0f},
        {3, "John", 78.0f}
    };

    for (int i = 0; i < 3; i++) {
        printf("%d %-6s %.1f\n", list[i].roll, list[i].name, list[i].marks);
    }
    return 0;
}

Output:

Find the topper

#include <stdio.h>

struct Student {
    int roll;
    char name[20];
    float marks;
};

int main(void) {
    struct Student list[4] = {
        {1, "Robin", 85.5f}, {2, "Maria", 92.0f},
        {3, "John", 78.0f},  {4, "Asha", 88.0f}
    };
    int top = 0;

    for (int i = 1; i < 4; i++) {
        if (list[i].marks > list[top].marks) {
            top = i;
        }
    }
    printf("Topper: %s with %.1f marks\n", list[top].name, list[top].marks);
    return 0;
}

Output:

Read records from the user

#include <stdio.h>

struct Student {
    char name[20];
    int marks;
};

int main(void) {
    struct Student s[2];

    for (int i = 0; i < 2; i++) {
        scanf("%19s %d", s[i].name, &s[i].marks);
    }
    for (int i = 0; i < 2; i++) {
        printf("%s: %d\n", s[i].name, s[i].marks);
    }
    return 0;
}

Output:

Next: C Pointer to Structure.

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