Student Marks Analyzer in C

Summary: This C program stores the details of six students using structures, calculates the minimum, maximum, and average marks, and displays all student information along with the statistics.

#include <stdio.h>
#include <float.h> // Include float.h for FLT_MAX and FLT_MIN

int main() {
    struct student {
        char name[50];
        char rollNumber[20];
        float marks;
    };
    struct student students[6] = {
        {"Kandisa Vinay Vishnu Vardhan", "CL20250315011037946", 85.5},
        {"Matta Sai Venkat Poojith", "CL2025031501103341", 90.0},
        {"Mohammed Abdul Khayyum", "CL2025031501103352", 78.0},
        {"Mohammed Faizan Bin Haque", "CL2025031501103363", 88.5},
        {"N. Deepika", "CL2025031501103385", 92.0},
        {"Nukapeyyi Tanuja", "CL2025031501103374", 80.0}
    };
    float min = FLT_MAX;
    float max = FLT_MIN;
    float sum = 0;
    for (int i = 0; i < 6; i++) {
        if (students[i].marks < min) {
            min = students[i].marks;
        }
        if (students[i].marks > max) {
            max = students[i].marks;
        }
        sum += students[i].marks;
    }

    printf("\nStudent Details:\n");
    for (int i = 0; i < 6; i++) {
        printf("Name: %s\n", students[i].name);
        printf("Roll Number: %s\n", students[i].rollNumber);
        printf("Marks: %.2f\n\n", students[i].marks);
    }

    printf("Minimum marks: %.2f\n", min);
    printf("Maximum marks: %.2f\n", max);
    printf("Average marks: %.2f\n", sum / 6);

    return 0;
}

Explanation:

Structures:
The program uses a struct to define a custom data type called student, which groups together multiple variables: name, roll number, and marks. This allows the program to treat each student's details as a single entity.

Arrays of Structures:
An array students[6] holds the data of six students. Each element in the array is a structure variable, enabling easy iteration and access to student details.

Initialization:
The array is initialized with predefined data for each student. This allows the program to operate without additional user input.

Using <float.h>:
Constants FLT_MAX and FLT_MIN from the <float.h> library are used to initialize min and max respectively. These provide safe starting values when searching for minimum and maximum marks.

Loops and Aggregation:
A for loop iterates over the array to:

• Compare and update minimum and maximum marks.
• Calculate the total sum of marks for averaging.

Another for loop prints each student's details.

Formatted Output:
The program uses printf() with format specifiers like %.2f to neatly display float values up to two decimal places.