>>142
int numofbits5(long bits) {
　bits = (bits & 0x55555555) + (bits >> 1 & 0x55555555);
　bits = (bits & 0x33333333) + (bits >> 2 & 0x33333333);
　bits = (bits & 0x0f0f0f0f) + (bits >> 4 & 0x0f0f0f0f);
　bits = (bits & 0x00ff00ff) + (bits >> 8 & 0x00ff00ff);
　return (bits & 0x0000ffff) + (bits >>16 & 0x0000ffff);
}