C Programming – HackerRank Solution | Set Bits 3 |

(HackerRank) Write a Modular C Programming code to solve Set Bits 3, Find the number of set bits (number of 1’s) in binary representation of a given positive number.

-3

Invalid

9

2

 9 in binary is 1001 and number of 1's in 1001 is 2. 

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CODE:

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>

int main() {
    int bset=0,i=0;
    int n,r;
    scanf("%d",&n);
    if(n>0)
    {
    while(n!=0)
    {
        r=n%2;
        if(r==1)
           bset++;
        n=n/2;
        i++;
    }
    printf("%d",bset);
}
    else{
        printf("Invalid");
    }
    return 0;
}

OUTPUT

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Input (stdin)

-3
Your Output (stdout)

Invalid
Expected Output

Invalid

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