Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Assume 32 bits?
    int count = 0;
    for (int i = 0; i < 32; i++) {
        count += (((1 << i) & n) > 0);
    }
    return count;
}

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

Solving Approach