Thread: compare pointer to int without new var

I made a class, and I know what the problem is, but I don't know how to fix the problem the way I want to. I want to compare a pointer to an int, but without creating a new variable. For my case, doing this is very trivial, as I do not need to worry about operation time on such a small game as mine, but I just want to get in the habit of creating efficient code, whether I need it or not.
Now nudging on, I have made a class, and I have found the problem from the compiler error, I am not allowed to compare a pointer to a int, but is there some way to get around this without making a new variable, as the whole point is of me using a pointer is to conserve memory.
Here's my class.

Code:

class pong_movement
    {
        public:
            void set_cords(int pong_x, int pong_y); // points pointers
            void speed_x();         //chages outside pong positions
            void speed_y();
        private:
            int *ptr_x;          // to acces pong pos out of class
            int *ptr_y;
            bool x_dir;     // tells which way pong is travling
            bool y_dir;
    };

    void pong_movement::set_cords(int pong_x, int pong_y)
        {
            ptr_x = &pong_x;
            ptr_y = &pong_y;
            y_dir = false; // y starts at top and moves down, thus starts false
            x_dir = true;
        }

    void pong_movement::speed_x()
        {
            if (ptr_x <= 0 | x_dir) //
                {
                    ptr_x++;
                    x_dir = true;
                }
            else if(ptr_x >= 455 | !x_dir)
                {
                    ptr_x--;
                    x_dir = false;
                }
        }

    void pong_movement::speed_y()
        {
            if (ptr_y <= 0 | !y_dir) //
                {
                    ptr_y++;
                    y_dir = false;
                }
            else if(ptr_y >= 615 | !y_dir)
                {
                    ptr_y--;
                    y_dir = true;
                }
        }

Will the pointers be assigned the address of the outside vars, or does the class create a new variable when a the function is called? I will initiate the class at the beginning of the program with pong::set_cords then I will use speed_x/y in a while loop of the game. Will this work behind the whole theory of my class?

Thanks,

Joe

Well is there a solution? Can I somehow pass the address rather than the value?
If not, is there a solution to my main question?

Originally Posted by avgprogamerjoe

I want to compare a pointer to an int

Unless you can provide an EXTREMELY good explanation of why you want to do that, I'd say your design is just broken, period. What makes you think you need to compare a pointer to an integer?