Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    static int count=0;
    while(n)
    {  
        n=n&n-1;
        count++;
    }
    return count;
}

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

Solving Approach