[C++基础] new 和 delete

2013 九月 24 周二 Zoey Young C&C++ 笔试面试 C++ 基础编程
#include <iostream>
using namespace std;

class Base_J {
public:
    Base_J() { cout << "Base Created" << endl; }
    ~Base_J() { cout << "Base Destroyed" << endl; }
};

class Derived_J:public Base_J {
public:
    Derived_J() { cout << "Derived Created" << endl; }
    ~Derived_J() { cout << "Derived Destroyed" << endl; }
};

int main() {
    Base_J* pB = new Derived_J();
    delete pB;
    return 0;
}
// Base Created
// Derived Created
// Base Destroyed


#include <iostream>
using namespace std;

class Base_J {
public:
    Base_J() {
        cout << "Base Created" << endl;
    }
    virtual ~Base_J() {
        cout << "Base Destroyed" << endl;
    }
};

class Derived_J: public Base_J {
public:
    Derived_J() {
        cout << "Derived Created" << endl;
    }
    virtual ~Derived_J() {
        cout << "Derived Destroyed" << endl;
    }
};

int main() {
    Base_J* pB = new Derived_J();
    delete pB;
    return 0;
}
// Base Created
// Derived Created
// Derived Destroyed
// Base Destroyed