Interview Question for Software Engineer at Microsoft:

//Reverse array in place
template <class T>
void reverse_in_place( T* src_array, size_t count)
{
   if (src_array == NULL) return;
   if( count <= 1 ) return; //done

   typename T * front = &src_array[0];
   typename T * back = &src_array[count-1];

   while (front != back)
   {
        std::swap(*front, *back);
        front++;
        if(front == back) {break; } ;
        back--;
   }
}