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APC-PRAC-021.c

Problem Statement

Write a program to check special number (sum of digit + product of digit = original number)

Metadata

Property Detail
Author Amit Dutta (amitdutta4255@gmail.com)
License MIT
Difficulty Beginner (index: 1 / 10)

Concepts

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  • Recursion
  • Iteration

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Source Code

#include <stdio.h>

int main()
{
    int num, temp, sumOfDigit = 0, productOfDigit = 1;
    printf("Enter the number to check if it is a special number : ");
    scanf("%d", &num);
    temp = num;
    while (temp > 0)
    {
        sumOfDigit += temp % 10;
        productOfDigit *= temp % 10;
        temp /= 10;
    }
    temp = sumOfDigit + productOfDigit;
    if (num == temp)
        printf("\nInput %d is a special number.", num);
    else
        printf("\nInput %d is not a special number.", num);
    return 0;
}

Explanation

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    You are explaining a C programming code to a beginner.

    STRICT RULES:

    - 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 (APC-PRAC-021.c):

    #include <stdio.h>

    int main()
    {
        int num, temp, sumOfDigit = 0, productOfDigit = 1;
        printf("Enter the number to check if it is a special number : ");
        scanf("%d", &num);
        temp = num;
        while (temp > 0)
        {
            sumOfDigit += temp % 10;
            productOfDigit *= temp % 10;
            temp /= 10;
        }
        temp = sumOfDigit + productOfDigit;
        if (num == temp)
            printf("\nInput %d is a special number.", num);
        else
            printf("\nInput %d is not a special number.", num);
        return 0;
    }