fig09_11.cpp

来自「经典vc教程的例子程序」· C++ 代码 · 共 43 行

// Fig. 9.11: fig09_11.cpp
// Driver for multiple inheritance example
#include <iostream.h>
#include "base1.h"
#include "base2.h"
#include "derived.h"

int main()
{
   Base1 b1( 10 ), *base1Ptr = 0;  // create Base1 object
   Base2 b2( 'Z' ), *base2Ptr = 0; // create Base2 object
   Derived d( 7, 'A', 3.5 );       // create Derived object

   // print data members of base class objects
   cout << "Object b1 contains integer " << b1.getData() 
        << "\nObject b2 contains character " << b2.getData()
        << "\nObject d contains:\n" << d << "\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: " << d.Base1::getData()
        << "\n  Character: " << d.Base2::getData()
        << "\nReal number: " << d.getReal() << "\n\n";

   cout << "Derived can be treated as an "
        << "object of either base class:\n";

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

   // treat Derived as a Base2 object
   base2Ptr = &d;
   cout << "base2Ptr->getData() yields "
        << base2Ptr->getData() << endl;

   return 0;
}