30. Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {
    
    int result = 0;
    for( int i = 0 ; i < 32 ; i ++ )
    {
        bool flag = n & ( 1 << i );
        result += flag;

    }
    return result;
}

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