add pointer in classes

add interfaces

CPlusPlus/Classes/ICompareable.h

@@ -0,0 +1,13 @@
+#pragma once
+
+// only for demonstration
+#include <iostream>
+
+class ICompareable
+{
+public:
+	ICompareable() { std::cout << "ICompareable::ICompareable()" << std::endl; } // constructor, only for demonstration
+	virtual ~ICompareable() { std::cout << "ICompareable::~ICompareable()" << std::endl; } // destructor
+
+	virtual bool Compare(const ICompareable* pOther) = 0; // pure virtual - abstract method
+};