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diff --git a/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_13_20/cylinder.cpp b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_13_20/cylinder.cpp
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+++ b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_13_20/cylinder.cpp
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+// Fig. 10.19: cylinder.cpp
+// Cylinder class inherits from class Circle.
+#include <iostream>
+
+using std::cout;
+
+#include "cylinder.h"   // Cylinder class definition
+
+// default constructor
+Cylinder::Cylinder( int xValue, int yValue, double radiusValue, 
+  double heightValue ) 
+  : Circle( xValue, yValue, radiusValue )
+{
+   setHeight( heightValue );
+
+} // end Cylinder constructor
+
+// set Cylinder's height
+void Cylinder::setHeight( double heightValue )
+{
+   height = ( heightValue < 0.0 ? 0.0 : heightValue );
+
+} // end function setHeight
+
+// get Cylinder's height
+double Cylinder::getHeight() const
+{
+   return height;
+
+} // end function getHeight
+
+// override virtual function getArea: return Cylinder area
+double Cylinder::getArea() const
+{
+   return 2 * Circle::getArea() +           // code reuse
+      getCircumference() * getHeight();
+
+} // end function getArea
+
+// override virtual function getVolume: return Cylinder volume
+double Cylinder::getVolume() const
+{
+   return Circle::getArea() * getHeight();  // code reuse
+
+} // end function getVolume
+
+// override virtual function getName: return name of Cylinder
+string Cylinder::getName() const
+{
+   return "Cylinder";
+
+}  // end function getName
+
+// override virtual function print: output Cylinder object
+void Cylinder::print() const
+{
+   Circle::print();  // code reuse
+   cout << "; height is " << getHeight();
+
+} // end function print
+
+/**************************************************************************
+ * (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.                     *
+ *************************************************************************/
+\ No newline at end of file