chore: Add course material

397/SolutionEx71A/Pole.h

@@ -0,0 +1,35 @@
+
+
+#ifndef POLE_H
+#define POLE_H
+
+#include "Light.h"
+#include "Observer.h"
+#include "Pelican.h"
+#include "Subject.h"
+
+class Hint;
+class PoleVisitor;
+
+class Pole : public Observer, public Subject {
+  public:
+    void update(const Hint &);
+
+    void accept(PoleVisitor &);
+
+    Pole(int x, int y, Pelican &p);
+    ~Pole();
+
+  private:
+    Pelican &myPelican;
+
+    void setTrafficLights(Pelican::PelicanState);
+    void setWaitLight(bool);
+
+    enum LightName { RED_LIGHT, YELLOW_LIGHT, GREEN_LIGHT, GREEN_MAN, RED_MAN };
+
+    Light *lights[RED_MAN + 1];
+    Light *waitLight;
+};
+
+#endif