Division from Marks in C

A division-classification program first calculates or accepts a percentage and then maps that value to ranges such as first, second or third division. Validate the percentage before classifying it.

Division from Percentage Top ↑

#include <stdio.h>

int main(void) {
    double percentage = 67.5;

    if (percentage < 0.0 || percentage > 100.0) {
        printf("Invalid percentage.\n");
    } else if (percentage >= 60.0) {
        printf("First Division\n");
    } else if (percentage >= 50.0) {
        printf("Second Division\n");
    } else if (percentage >= 40.0) {
        printf("Third Division\n");
    } else {
        printf("Fail\n");
    }

    return 0;
}

Read Percentage from the User Top ↑

#include <stdio.h>

int main(void) {
    double percentage;

    printf("Enter percentage: ");
    if (scanf("%lf", &percentage) != 1) {
        printf("Invalid input.\n");
        return 1;
    }

    if (percentage < 0.0 || percentage > 100.0) {
        printf("Percentage must be from 0 to 100.\n");
    } else if (percentage >= 60.0) {
        printf("First Division\n");
    } else if (percentage >= 50.0) {
        printf("Second Division\n");
    } else if (percentage >= 40.0) {
        printf("Third Division\n");
    } else {
        printf("Fail\n");
    }

    return 0;
}

Calculate the Percentage First Top ↑

#include <stdio.h>

int main(void) {
    double marks[] = {62, 71, 58, 69, 65};
    size_t count = sizeof marks / sizeof marks[0];
    double total = 0.0;

    for (size_t i = 0; i < count; i++) {
        total += marks[i];
    }

    double percentage = total / count;

    printf("Percentage = %.2f%%\n", percentage);

    if (percentage >= 60.0) {
        printf("First Division\n");
    } else if (percentage >= 50.0) {
        printf("Second Division\n");
    } else if (percentage >= 40.0) {
        printf("Third Division\n");
    } else {
        printf("Fail\n");
    }

    return 0;
}

Preserved Example: Add a Distinction Category Top ↑

#include <stdio.h>

int main(void) {
    double percentage = 78.5;

    if (percentage >= 75.0) {
        printf("Distinction\n");
    } else if (percentage >= 60.0) {
        printf("First Division\n");
    } else if (percentage >= 50.0) {
        printf("Second Division\n");
    } else if (percentage >= 40.0) {
        printf("Third Division\n");
    } else {
        printf("Fail\n");
    }

    return 0;
}

Preserved Example: Calculate Percentage and Division with Functions Top ↑

#include <stdio.h>

 double calculate_percentage(const double marks[], size_t count) {
    double total = 0.0;
    for (size_t i = 0; i < count; i++) total += marks[i];
    return total / count;
}

void print_division(double percentage) {
    if (percentage >= 75.0) printf("Distinction\n");
    else if (percentage >= 60.0) printf("First Division\n");
    else if (percentage >= 50.0) printf("Second Division\n");
    else if (percentage >= 40.0) printf("Third Division\n");
    else printf("Fail\n");
}

int main(void) {
    double marks[] = {72, 81, 64, 77, 69};
    size_t count = sizeof marks / sizeof marks[0];
    double percentage = calculate_percentage(marks, count);

    printf("Percentage: %.2f%%\n", percentage);
    print_division(percentage);
    return 0;
}

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

About the author   Watch on YouTube

Connect: