// put the proper #include's here 

//  void GetMouse( Point & pt ) returns (immediately) and fills its argument,
//        passed by reference, with the coordinates of the mouse pointer 
//        at the time of the function call. The function has another form,
//        void GetMouse( int & x , int & y ).
//
//  Reminder: struct Point {
//               int h;  // x-coordinate
//               int v;  // y-coordinate
//            };
//
//  bool Button() returns (immediately) the status of the mouse button 
//        at the moment of the call, true if down, false if up.       

//  DEMO 0: 
//        The mote's direction of movement is determined by the current
//        position of the mouse pointer. The mote always moves towards the
//        pointer position.         


int main(){

    BigSquarePair();

    int x = 200, y = 200, r = 3;
    int vx = 0, vy = 0; 
	int velocity = 1;  // the number of pixels traveled in one tick

	// Velocities greater than 1 lead to a funny bug.
	//   See if you can fix it :-) .
	// cout << "Enter mote speed (1-10): ";
	// cin >> velocity;

    cout << "\nDirect the mote with the mouse,\n";
    cout << "Click the mouse button to finish.\n\n";

    while( ! Button() ){        // while the button is up

        Point pt;
		GetMouse( pt );  // fill pt with mouse pointer coords
		
		// Figure out the next movement.
		// The code below makes the horizontal and 
		//   vertical movements indepedent.
		if( x > pt.h )
			vx = -velocity;
		else if( x < pt.h )
			vx  = velocity;
		else 
			vx = 0;

		if( y > pt.v )
			vy = -velocity;
		else if( y < pt.v )
			vy  = velocity;
		else 
			vy = 0;
		
		SetForeColor( 255, 255, 255 );  // erase mote
        PaintCircle( x, y, r );

        x += vx;                  // update position
        y += vy;

        if( x < 0 )               // wrap around the screen if going  
            x = 400;              // beyond the screen margins 
        else if( x > 400 )
            x = 0;

        if( y < 0 ) 
            y = 400;
        else if( y > 400 )
            y = 0;

        SetForeColor( 0, 0, 255 );     // draw mote
        PaintCircle( x, y, r );
        Delay( 50 );
    }

    PressReturn();

    return 0;
}