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| author | Sven Eisenhauer <sven@sven-eisenhauer.net> | 2023-11-10 15:11:48 +0100 |
|---|---|---|
| committer | Sven Eisenhauer <sven@sven-eisenhauer.net> | 2023-11-10 15:11:48 +0100 |
| commit | 33613a85afc4b1481367fbe92a17ee59c240250b (patch) | |
| tree | 670b842326116b376b505ec2263878912fca97e2 /Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07 | |
| download | Studium-master.tar.gz Studium-master.tar.bz2 | |
Diffstat (limited to 'Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07')
5 files changed, 271 insertions, 0 deletions
diff --git a/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07/circle.cpp b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07/circle.cpp new file mode 100644 index 0000000..582d5d9 --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07/circle.cpp @@ -0,0 +1,74 @@ +// Fig. 10.4: circle.cpp
+// Circle class member-function definitions.
+#include <iostream>
+
+using std::cout;
+
+#include "circle.h" // Circle class definition
+
+// default constructor
+Circle::Circle( int xValue, int yValue, double radiusValue )
+ : Point( xValue, yValue ) // call base-class constructor
+{
+ setRadius( radiusValue );
+
+} // end Circle constructor
+
+// set radius
+void Circle::setRadius( double radiusValue )
+{
+ radius = ( radiusValue < 0.0 ? 0.0 : radiusValue );
+
+} // end function setRadius
+
+// return radius
+double Circle::getRadius() const
+{
+ return radius;
+
+} // end function getRadius
+
+// calculate and return diameter
+double Circle::getDiameter() const
+{
+ return getRadius() * 2;
+
+} // end function getDiameter
+
+// calculate and return circumference
+double Circle::getCircumference() const
+{
+ return 3.14159 * getDiameter();
+
+} // end function getCircumference
+
+// calculate and return area
+double Circle::getArea() const
+{
+ return 3.14159 * getRadius() * getRadius();
+
+} // end function getArea
+
+// output Circle object
+void Circle::print() const
+{
+ cout << "Center = ";
+ Point::print(); // invoke Point's print function
+ cout << "; Radius = " << getRadius();
+
+} // 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 diff --git a/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07/circle.h b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07/circle.h new file mode 100644 index 0000000..fc22e5b --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07/circle.h @@ -0,0 +1,44 @@ +// Fig. 10.3: circle.h
+// Circle4 class contains x-y coordinate pair and radius.
+#ifndef CIRCLE_H
+#define CIRCLE_H
+
+#include "point.h" // Point class definition
+
+class Circle : public Point {
+
+public:
+
+ // default constructor
+ Circle( int = 0, int = 0, double = 0.0 );
+
+ void setRadius( double ); // set radius
+ double getRadius() const; // return radius
+
+ double getDiameter() const; // return diameter
+ double getCircumference() const; // return circumference
+ double getArea() const; // return area
+
+ void print() const; // output Circle object
+
+private:
+ double radius; // Circle's radius
+
+}; // end class Circle
+
+#endif
+
+/**************************************************************************
+ * (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 diff --git a/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07/fig10_07.cpp b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07/fig10_07.cpp new file mode 100644 index 0000000..184ed32 --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07/fig10_07.cpp @@ -0,0 +1,48 @@ +// Fig. 10.7: fig10_07.cpp
+// Attempting to invoke derived-class-only member functions
+// through a base-class pointer.
+#include "point.h" // Point class definition
+#include "circle.h" // Circle class definition
+
+int main()
+{
+ Point *pointPtr = 0;
+ Circle circle( 120, 89, 2.7 );
+
+ // aim base-class pointer at derived-class object
+ pointPtr = &circle;
+
+ // invoke base-class member functions on derived-class
+ // object through base-class pointer
+ int x = pointPtr->getX();
+ int y = pointPtr->getY();
+ pointPtr->setX( 10 );
+ pointPtr->setY( 10 );
+ pointPtr->print();
+
+ // attempt to invoke derived-class-only member functions
+ // on derived-class object through base-class pointer
+ double radius = pointPtr->getRadius();
+ pointPtr->setRadius( 33.33 );
+ double diameter = pointPtr->getDiameter();
+ double circumference = pointPtr->getCircumference();
+ double area = pointPtr->getArea();
+
+ return 0;
+
+} // end main
+
+/**************************************************************************
+ * (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 diff --git a/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07/point.cpp b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07/point.cpp new file mode 100644 index 0000000..43a6b14 --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07/point.cpp @@ -0,0 +1,65 @@ +// Fig. 10.2: point.cpp
+// Point class member-function definitions.
+#include <iostream>
+
+using std::cout;
+
+#include "point.h" // Point class definition
+
+// default constructor
+Point::Point( int xValue, int yValue )
+ : x( xValue ), y( yValue )
+{
+ // empty body
+
+} // end Point constructor
+
+// set x in coordinate pair
+void Point::setX( int xValue )
+{
+ x = xValue; // no need for validation
+
+} // end function setX
+
+// return x from coordinate pair
+int Point::getX() const
+{
+ return x;
+
+} // end function getX
+
+// set y in coordinate pair
+void Point::setY( int yValue )
+{
+ y = yValue; // no need for validation
+
+} // end function setY
+
+// return y from coordinate pair
+int Point::getY() const
+{
+ return y;
+
+} // end function getY
+
+// output Point object
+void Point::print() const
+{
+ cout << '[' << getX() << ", " << getY() << ']';
+
+} // 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 diff --git a/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07/point.h b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07/point.h new file mode 100644 index 0000000..6a2874e --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_07/point.h @@ -0,0 +1,40 @@ +// Fig. 10.1: point.h
+// Point class definition represents an x-y coordinate pair.
+#ifndef POINT_H
+#define POINT_H
+
+class Point {
+
+public:
+ Point( int = 0, int = 0 ); // default constructor
+
+ void setX( int ); // set x in coordinate pair
+ int getX() const; // return x from coordinate pair
+
+ void setY( int ); // set y in coordinate pair
+ int getY() const; // return y from coordinate pair
+
+ void print() const; // output Point object
+
+private:
+ int x; // x part of coordinate pair
+ int y; // y part of coordinate pair
+
+}; // end class Point
+
+#endif
+
+/**************************************************************************
+ * (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 |