Added previous arduino implementations.

Problem3.hpp

@@ -0,0 +1,19 @@
+#ifndef Problem3_h
+#define Problem3_h
+
+#include "ProblemBase.hpp"
+#include "Vector.h"
+
+class Problem3 : public ProblemBase {
+
+private:
+  Vector<unsigned long> primes;
+  unsigned long iterator = 2;
+  float fl_input;
+  
+public:
+  Problem3();
+  bool Step();
+};
+
+#endif