Skip to content

assignment-p-08.c

Problem Statement

Write a C program that includes a user-defined function named countSetBits with the signature int countSetBits(int num);. The function should count and return the number of set bits (1s) in the binary representation of the given number.

Metadata

Property Detail
Author Amit Dutta (amitdutta4255@gmail.com)
License MIT
Difficulty Beginner (index: 3 / 10)

Concepts

Beta Feature

This concept detection system is still in beta and may occasionally show incorrect or incomplete results.

  • Recursion
  • Iteration

Actions

Raw View on GitHub

You can print or save this file by opening Raw and using your browser.

Source Code

#include <stdio.h>

int countSetBits(int);

int main()
{
    int num, result;
    printf("Enter the number: ");
    scanf("%d", &num);
    if (result = countSetBits(num))
    {
        printf("\nNumber of set bits in %d: %d", num, result);
    }
    else
    {
        printf("\nThere is no set bits in %d", num);
    }
    return 0;
}

int countSetBits(int num)
{
    int count = 0;
    int mask= 1;
    int i = 1;
    while (i <= 16)
    {
        if (num & mask)
        {
            count++;
        }
        mask <<= 1;
        i++;
    }
    return count;
}

Explanation

Explain with AI

Copy the prompt below and paste it into any AI assistant.

    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 (assignment-p-08.c):

    #include <stdio.h>

    int countSetBits(int);

    int main()
    {
        int num, result;
        printf("Enter the number: ");
        scanf("%d", &num);
        if (result = countSetBits(num))
        {
            printf("\nNumber of set bits in %d: %d", num, result);
        }
        else
        {
            printf("\nThere is no set bits in %d", num);
        }
        return 0;
    }

    int countSetBits(int num)
    {
        int count = 0;
        int mask= 1;
        int i = 1;
        while (i <= 16)
        {
            if (num & mask)
            {
                count++;
            }
            mask <<= 1;
            i++;
        }
        return count;
    }