chore: Add course material

397/SolutionEx31Bonus/TimerSet.h

@@ -0,0 +1,30 @@
+#ifndef TIMERSET_H
+#define TIMERSET_H
+
+#include <ctime>
+#include <vector>
+
+class Timer;
+
+class TimerSet {
+  public:
+    void pollAllTimers();
+    void addATimer(Timer *);
+
+  private:
+    TimerSet();
+    std::vector<Timer *> timers; // 3.1 bonus: change from array to vector
+    // int timersInUse; // 3.1 bonus: Not needed
+    std::time_t previousTime;
+
+    //  Meyer's singleton
+  public:
+    static TimerSet &Instance();
+
+  private:
+    // prevent copying and assignment of the singleton
+    TimerSet(const TimerSet &);
+    TimerSet &operator=(const TimerSet &);
+};
+
+#endif