[转载]析构函数的虚析构和非虚析构调用的差别

#include <stdio.h>
#include <iostream>

using namespace std;

class A
{
public:
        A()
        {
                std::cout << "A is created." << std::endl;
        }
 
        ~A()
        {
                std::cout << "A is deleted." << std::endl;
        }
};
 
class B : public A
{
public:
        B()
        {
                std::cout << "B is created." << std::endl;
        }
 
        ~B()
        {
                std::cout << "B is deleted." << std::endl;
        }
};

 
int main()
{
    A* pA = new B();
    delete pA;
    return 0;
}

#include <stdio.h>
#include <iostream>

using namespace std;

class A
{
public:
        A()
        {
                std::cout << "A is created." << std::endl;
        }
 
        virtual ~A()
        {
                std::cout << "A is deleted." << std::endl;
        }
};
 
class B : public A
{
public:
        B()
        {
                std::cout << "B is created." << std::endl;
        }
 
        ~B()
        {
                std::cout << "B is deleted." << std::endl;
        }
};

 
int main()
{
    A* pA = new B();
    delete pA;
    return 0;
}