class Shape;//abstract class
class DispWindow;
class Dot;
class Point;
int main()
{
DispWindow Wind(150, 100);
for (int j = 0; j < 30; j++)
{
for (int i = 0; i < 30; i++)
{
Wind.draw(Dot(Wind.current()));
}
Wind.current(Point(0, j * 10));
}
Wind.show();
}
class DispWindow;
class Dot;
class Point;
int main()
{
DispWindow Wind(150, 100);
for (int j = 0; j < 30; j++)
{
for (int i = 0; i < 30; i++)
{
Wind.draw(Dot(Wind.current()));
}
Wind.current(Point(0, j * 10));
}
Wind.show();
}
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