Count Set Bits in an Integer

Code

#include <stdio.h>
int bit,cnt;
int countSetBits(unsigned int n) 
{
    // Write your code here
    cnt=0;
    for(bit=31;bit>=0;bit--)
    {
        if(n & (1<<bit))
        {
            cnt++;
        }
    }
    return cnt;
}

int main() {
    int n;
    scanf("%d", &n);
    printf("%d", countSetBits(n));
    return 0;
}

Solving Approach