Canvas

// Canvas.h
class Canvas
{
private:
    // Matrice di punti.
    bool points[24][80];

public:
    // Costruttore.
    Canvas();
    // Distruttore.
    virtual ~Canvas();
    // Accende un punto ad una determinata coordinata specificata dai parametri.
    void set(int, int);
    // Spegne un punto ad una determinata coordinata specificata dai parametri.
    void reset(int, int);
    // Pulisce il canovaccio;
    void clear();
    // Controlla se un punto è acceso.
    bool isSet(int, int) const;
};

// Canvas.cpp

Canvas::Canvas() : points()
{
    clear();
}


Canvas::~Canvas() {}

void Canvas::set(int x, int y)
{
    if (x < 0 || x > 79 || y < 0 || y > 23) return;
    points[y][x] = true;
}

void Canvas::reset(int x, int y)
{
    if (x < 0 || x > 79 || y < 0 || y > 23) return;
    points[y][x] = false;
}

void Canvas::clear()
{
    for (int y = 0; y < 24; ++y)
        for (int x = 0; x < 80; ++x)
            reset(x, y);
}

bool Canvas::isSet(int x, int y) const {
    if (x < 0 || x > 79 || y < 0 || y > 23) return false;
    return points[y][x];
}

// main
#include "Canvas.h"
#include "Shape.h"
#include "Rectangle.h"
#include "Square.h"
#include "Ellipse.h"
#include "Circle.h"

void drawShapeOnCanvas(Shape& s, Canvas& c) {
    s.draw(c);
}

void printCanvas(Canvas& c) {
    for (int y = 0; y < 24; ++y) {
        for (int x = 0; x < 80; ++x)
            cout << (c.isSet(x, y) ? '*' : ' ');
        cout << endl;
    }
}
int main()
{
    Canvas c;
    c.set(10, 10);
    c.set(30, 15);
    printCanvas(c);
    Rectangle r(4, 4, 20, 15);
    drawShapeOnCanvas(r, c);
    Square s(4, 4, 15);
    drawShapeOnCanvas(s, c);
    Ellipse e(30, 12, 25, 10);
    Circle ci(30, 12, 10);
    drawShapeOnCanvas(e, c);
    drawShapeOnCanvas(ci, c);
    printCanvas(c);
}