Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    int num = 0;
    while (n) {
        if (n & 0x1)
            num++;
        n >>= 1;
    }
    return num;
}

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

Solving Approach