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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_01_05/Fig10_05.cpp | |
| download | Studium-master.tar.gz Studium-master.tar.bz2 | |
Diffstat (limited to 'Bachelor/Prog2/Codebeispiele/2_ch10/fig10_01_05/Fig10_05.cpp')
| -rw-r--r-- | Bachelor/Prog2/Codebeispiele/2_ch10/fig10_01_05/Fig10_05.cpp | 75 |
1 files changed, 75 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. *
+ *************************************************************************/
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