diff options
Diffstat (limited to 'Bachelor/Prog2/Codebeispiele/2_ch10/fig10_01_05')
5 files changed, 298 insertions, 0 deletions
diff --git a/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_01_05/Fig10_05.cpp b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_01_05/Fig10_05.cpp new file mode 100644 index 0000000..c04f750 --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_01_05/Fig10_05.cpp @@ -0,0 +1,75 @@ +// Fig. 10.5: fig10_05.cpp
+// Aiming base-class and derived-class pointers at base-class
+// and derived-class objects, respectively.
+#include <iostream>
+
+using std::cout;
+using std::endl;
+using std::fixed;
+
+#include <iomanip>
+
+using std::setprecision;
+
+#include "point.h" // Point class definition
+#include "circle.h" // Circle class definition
+
+int main()
+{
+ Point point( 30, 50 );
+ Point *pointPtr = 0; // base-class pointer
+
+ Circle circle( 120, 89, 2.7 );
+ Circle *circlePtr = 0; // derived-class pointer
+
+ // set floating-point numeric formatting
+ cout << fixed << setprecision( 2 );
+
+ // output objects point and circle
+ cout << "Print point and circle objects:"
+ << "\nPoint: ";
+ point.print(); // invokes Point's print
+ cout << "\nCircle: ";
+ circle.print(); // invokes Circle's print
+
+ // aim base-class pointer at base-class object and print
+ pointPtr = &point;
+ cout << "\n\nCalling print with base-class pointer to "
+ << "\nbase-class object invokes base-class print "
+ << "function:\n";
+ pointPtr->print(); // invokes Point's print
+
+ // aim derived-class pointer at derived-class object
+ // and print
+ circlePtr = &circle;
+ cout << "\n\nCalling print with derived-class pointer to "
+ << "\nderived-class object invokes derived-class "
+ << "print function:\n";
+ circlePtr->print(); // invokes Circle's print
+
+ // aim base-class pointer at derived-class object and print
+ pointPtr = &circle;
+ cout << "\n\nCalling print with base-class pointer to "
+ << "derived-class object\ninvokes base-class print "
+ << "function on that derived-class object\n";
+ pointPtr->print(); // invokes Point's print
+ cout << endl;
+
+ 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_01_05/circle.cpp b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_01_05/circle.cpp new file mode 100644 index 0000000..91b708d --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_01_05/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 2 * getRadius();
+
+} // 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_01_05/circle.h b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_01_05/circle.h new file mode 100644 index 0000000..42ec256 --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_01_05/circle.h @@ -0,0 +1,44 @@ +// Fig. 10.3: circle.h
+// Circle 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. *
+ *************************************************************************/
diff --git a/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_01_05/point.cpp b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_01_05/point.cpp new file mode 100644 index 0000000..43a6b14 --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_01_05/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_01_05/point.h b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_01_05/point.h new file mode 100644 index 0000000..6a2874e --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/2_ch10/fig10_01_05/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 |