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// 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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