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|
#include<iostream>
#include<memory>
using namespace std;
class A{
public:
A() : pa(new int){}
~A() {delete pa;}
virtual void fn() {cout << "Class A" << endl;}
private:
int* pa;
};
class B : public A{
public:
B() : pb(new int){}
~B() {delete pb;}
void fn() {cout << "Class B" << endl;}
private:
int* pb;
};
class C :public A{
public:
C() : pc(new int){}
~C() {delete pc;}
void fn() {cout << "Class C" << endl;}
private:
int* pc;
};
int main (){
auto_ptr<A> a1(new B());
C c;
A& a2 = c;
a1->fn();
a2.fn();
system("pause");
return 0;
} |
