Programming Algorithms Question:

First version:

int CoutSetBits(int Num)
{

for(int count=0; Num; Num >>= 1)
{
if (Num & 1)
count++;
}
return count;
}


Optimized version:

int CoutSetBits(int Num)
{

for(int count =0; Num; count++)
{
Num &= Num -1;
}
}