#include <iostream>
using namespace std;
class BaseClass {
public:
virtual void who() {
cout << "Base\n";
}
};
class DerivedClass1 : public BaseClass {
public:
void who() {
cout << "First derivation\n";
}
};
class DerivedClass2 : public BaseClass {
// who() not defined
};
int main()
{
BaseClass base_obj;
BaseClass *p;
DerivedClass1 DerivedClass1_obj;
DerivedClass2 DerivedClass2_obj;
p = &base_obj;
p->who(); // access BaseClass's who()
p = &DerivedClass1_obj;
p->who(); // access DerivedClass1's who()
p = &DerivedClass2_obj;
p->who(); /* access BaseClass's who() because
DerivedClass2 does not redefine it */
return 0;
}
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