#include <stdio.h>

int bitCount (unsigned int n);

int main ( ) {
	printf ("# 1-bits in base 2 representation of %u = %d, should be 0\n",
		0, bitCount (0));
	printf ("# 1-bits in base 2 representation of %u = %d, should be 1\n",
		1, bitCount (1));
	printf ("# 1-bits in base 2 representation of %u = %d, should be 16\n",
		1431655765, bitCount (1431655765));
	printf ("# 1-bits in base 2 representation of %u = %d, should be 1\n",
		1073741824, bitCount (1073741824));
	printf ("# 1-bits in base 2 representation of %u = %d, should be 32\n",
		4294967295u, bitCount (4294967295u));
	return 0;
}