1 files changed, 34 insertions, 0 deletions
diff --git a/Bachelor/Prog1/examples/ch07/Fig07_20_23/interface.h b/Bachelor/Prog1/examples/ch07/Fig07_20_23/interface.h
new file mode 100644
index 0000000..5d229e1
--- /dev/null
+++ b/Bachelor/Prog1/examples/ch07/Fig07_20_23/interface.h
@@ -0,0 +1,34 @@
+// Fig. 7.21: interface.h
+// Header file for interface.cpp
+
+class Implementation;     // forward class declaration
+
+class Interface {
+
+public:
+   Interface( int );
+   void setValue( int );  // same public interface as
+   int getValue() const;  // class Implementation
+   ~Interface();
+
+private:
+
+   // requires previous forward declaration (line 4)
+   Implementation *ptr;   
+
+}; // end class Interface
+
+/**************************************************************************
+ * (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice      *
+ * Hall. All Rights Reserved.                                             *
+ *                                                                        *
+ * DISCLAIMER: The authors and publisher of this book have used their     *
+ * best efforts in preparing the book. These efforts include the          *
+ * development, research, and testing of the theories and programs        *
+ * to determine their effectiveness. The authors and publisher make       *
+ * no warranty of any kind, expressed or implied, with regard to these    *
+ * programs or to the documentation contained in these books. The authors *
+ * and publisher shall not be liable in any event for incidental or       *
+ * consequential damages in connection with, or arising out of, the       *
+ * furnishing, performance, or use of these programs.                     *
+ *************************************************************************/