Cześć :)
//: C15:AddingVirtuals.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 2000
// Copyright notice in Copyright.txt
// Adding virtuals in derivation
#include <iostream>
#include <string>
using namespace std;
class Pet {
string pname;
public:
Pet(const string& petName) : pname(petName) {}
virtual string name() const { return pname; }
virtual string speak() const { return ""; }
};
class Dog : public Pet {
string name;
public:
Dog(const string& petName) : Pet(petName) {
cout << Pet::name() << endl;
}
// New virtual function in the Dog class:
virtual string sit() const {
return Pet::name() + " sits";
}
string speak() const { // Override
return Pet::name() + " says 'Bark!'";
}
};
int main() {
Pet* p[] = {new Pet("generic"),new Dog("bob")};
cout << "p[0]->speak() = "
<< p[0]->speak() << endl;
cout << "p[1]->speak() = "
<< p[1]->speak() << endl;
//! cout << "p[1]->sit() = "
//! << p[1]->sit() << endl; // Illegal
} ///:~
Dlaczego literalnie musimy mu wskazać, którą funkcję wywołać, skoro dziediczymy po Pet?
Chodzi mi o to: Pet::name()