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assignment-s-01.c

Problem Statement

Write a program to compute the sum and product of digits of an integer using user defined functions.

Metadata

Property Detail
Author Amit Dutta (amitdutta4255@gmail.com)
License MIT
Difficulty Beginner (index: 2 / 10)

Concepts

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  • Recursion
  • Iteration

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Source Code

#include <stdio.h>

int sum_of_digits(int);
int product_of_digits(int);

int main()
{
    int num;
    printf("Enter the number: ");
    scanf("%d", &num);
    printf("\nSum of digits of %d = %d", num, sum_of_digits(num));
    printf("\nProduct of digits of %d = %d", num, product_of_digits(num));
    return 0;
}

int sum_of_digits(int num)
{
    int sum = 0;
    while (num > 0)
    {
        sum += num % 10;
        num /= 10;
    }
    return sum;
}

int product_of_digits(int num)
{
    int product = 1;
    while (num > 0)
    {
        product *= num % 10;
        num /= 10;
    }
    return product;
}

Explanation

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    You are explaining a C programming code to a beginner.

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    - Only use the given code. Do NOT assume anything not present.

    - Do NOT add extra examples.

    - Keep explanation clear and short.

    - If something is unclear, say "Not clear from code".

    - Follow the exact format below. Do NOT change headings.

    FORMAT:

    [START]

    ## What it does

    (Explain the overall purpose in 1-2 sentences)

    ## Step-by-step

    (Explain how the code works in steps, simple language)

    ## Key Concepts

    (List concepts like loop, condition, function, etc.)

    ## Notes

    (Mention any limitations, errors, or assumptions)

    [END]

    CODE (assignment-s-01.c):

    #include <stdio.h>

    int sum_of_digits(int);
    int product_of_digits(int);

    int main()
    {
        int num;
        printf("Enter the number: ");
        scanf("%d", &num);
        printf("\nSum of digits of %d = %d", num, sum_of_digits(num));
        printf("\nProduct of digits of %d = %d", num, product_of_digits(num));
        return 0;
    }

    int sum_of_digits(int num)
    {
        int sum = 0;
        while (num > 0)
        {
            sum += num % 10;
            num /= 10;
        }
        return sum;
    }

    int product_of_digits(int num)
    {
        int product = 1;
        while (num > 0)
        {
            product *= num % 10;
            num /= 10;
        }
        return product;
    }