The C++ Program Structure

void Point::Hide(void) {

Visible = false;

putpixel(X, Y, getbkcolor()); // uses background color to erase

};

Boolean Point::IsVisible(void) {

return Visible;

};

void Point::MoveTo(int NewX, int NewY) {

Hide(); // make current point invisible

X = NewX; // change X and Y coordinates to new location

Y = NewY;

Show(); // show point at new location

};