#include <iostream>

#include <stdlib.h>

using namespace std;

class A{

public:

    A(void)

    {

        cout << "A::A(void)" << this << endl;

    }

    ~A(void)

    {

        cout << "A::~A(void)" << this << endl;

    }

    static void* operator new(size_t size)

    {

        void* p = malloc(size);

        cout << "A::new(size_t) p=" << p << " size=" << size << endl;

        return p;

    }

    static void operator delete (void* p)

    {

        cout << "A::delete(void*) p=" << p << endl;

        free(p);

    }

    static void* operator new[](size_t size)

    {

        void* p = malloc(size);

        cout << "A::new[](size_t) p= " << p << " size=" <<size << endl;

        return p;

    }

    static void operator delete[](void* p)

    {

        cout << "A::delete[](size_t) p= " << p << endl;

        free(p);

    }

private:

    int m_i; //

    double m_d; //

    char m_c[]; //

};

int main(void)

{

    A* pa = new A;

    cout << "main(void) pa = " << pa << endl;

    delete pa;

    cout << "----------------" << endl;

    pa = new A[];

    //size返回3*24+4个字节，其中4个字节放数组长度

    cout << "main(void) pa = " << pa << endl;

    cout << ((int*)pa)[-] << endl;

    delete[] pa;

    return ;

}