Add factory example

cpp/patterns/factory/parts.hpp

@@ -0,0 +1,26 @@
+
+#ifndef PARTS_HPP
+#define PARTS_HPP
+
+#include <string>
+
+class Part {
+public:
+  std::string getName() const { return partName;}
+  float getPrice() const { return partPrice;}
+
+protected:
+  std::string partName; // The name of the part
+  float partPrice; // The partPrice of the part
+};
+
+
+/*****************************************************************************/
+// Gear
+
+class Gear : public Part {
+public:
+  explicit Gear(std::string name="Gear", float price = 1.0f);
+};
+
+#endif // PARTS_HPP