Count Set Bits in an Integer

Viet dz la anh E9

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here
    int d=0;
    while(n > 0)
    {
        d+=n&1;
        n=n>>1;
    }
    return d;
}

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

Solving Approach