fig24_11.cpp

Cpp how to program source code

// Fig. 24.11: Fig24_11.cpp
// Driver for multiple inheritance example.
#include <iostream>
using std::cout;
using std::endl;

#include "Base1.h"
#include "Base2.h"
#include "Derived.h"

int main()
{
   Base1 base1( 10 ), *base1Ptr = 0; // create Base1 object
   Base2 base2( 'Z' ), *base2Ptr = 0; // create Base2 object
   Derived derived( 7, 'A', 3.5 ); // create Derived object

   // print data members of base-class objects
   cout << "Object base1 contains integer " << base1.getData()
      << "\nObject base2 contains character " << base2.getData()
      << "\nObject derived contains:\n" << derived << "\n\n";

   // print data members of derived-class object
   // scope resolution operator resolves getData ambiguity
   cout << "Data members of Derived can be accessed individually:"
      << "\n    Integer: " << derived.Base1::getData()
      << "\n  Character: " << derived.Base2::getData()
      << "\nReal number: " << derived.getReal() << "\n\n";
   cout << "Derived can be treated as an object of either base class:\n";

   // treat Derived as a Base1 object
   base1Ptr = &derived;              
   cout << "base1Ptr->getData() yields " << base1Ptr->getData() << '\n';

   // treat Derived as a Base2 object
   base2Ptr = &derived;              
   cout << "base2Ptr->getData() yields " << base2Ptr->getData() << endl;
   return 0;
} // end main


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