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diff --git a/Bachelor/Prog2/Codebeispiele/1_ch09/elevatorinheritance/elevatorButton.cpp b/Bachelor/Prog2/Codebeispiele/1_ch09/elevatorinheritance/elevatorButton.cpp
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+// Fig. 9.36: elevatorButton.cpp: 
+// Member-function definitions for class ElevatorButton.
+#include <iostream>
+
+using std::cout;
+using std::endl;
+
+#include "elevatorButton.h"  // ElevatorButton class definition
+#include "elevator.h"        // Elevator class definition
+
+// constructor
+ElevatorButton::ElevatorButton( Elevator &elevatorHandle )
+   : Button( elevatorHandle )
+{ 
+   cout << "elevator button created" << endl; 
+
+} // end ElevatorButton constructor
+
+// destructor
+ElevatorButton::~ElevatorButton() 
+{ 
+   cout << "elevator button destroyed" << endl; 
+
+} // end ~ElevatorButton destructor
+
+// press button and signal elevator to prepare to leave floor
+void ElevatorButton::pressButton() 
+{
+   Button::pressButton();
+   cout << "elevator button tells elevator to prepare to leave" 
+        << endl;
+   elevatorRef.prepareToLeave( true );
+
+} // end function pressButton
+
+/**************************************************************************
+ * (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.                     *
+ *************************************************************************/