Get bit and Set bit

bool GetBit(int n, int index)

{

    return (n&(1<<index)>0);

}

int SetBit(int n, int index, bool b)

{

    if (b)

   {

       return (n | (1<<index));

   }

   else

   {

        int mask = ~(1<<index);

        return n& mask;

   }

}