Move all C++ tests to cpp.

cpp/virtual_overriding.cpp

@@ -0,0 +1,42 @@
+#include <stdio.h>
+
+class A
+{
+public:
+	virtual A* fun()
+	{
+		puts( "A* fun()" );
+		return new A;
+	}
+};
+
+class B
+{
+public:
+	virtual B* fun1()
+	{
+		puts( "B* fun()" );
+		return new B;
+	}
+};
+
+class C : public B, public A
+{
+public:
+	virtual C* fun()
+	{
+		puts( "C* fun()" );
+		return new C;
+	}
+};
+
+int main()
+{
+	A* p = new C;
+
+	A* p_f = p->fun();
+
+
+	return 0;
+}
+