Add abstract-factory pattern example

cpp/patterns/abstract-factory/parts.hpp

@@ -0,0 +1,35 @@
+
+#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:
+  Gear(std::string name="Gear", float price = 1.0f);
+};
+
+
+/*****************************************************************************/
+// Spring
+
+class Spring : public Part {
+public:
+  Spring(std::string name = "Spring", float price = 2.0f);
+};
+
+#endif // PARTS_HPP