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

using namespace std;

class A {
public:
    int pub_i1;
    int pub_i2;

    void pub_foo1() {
        cout << "A::prv_i1 addr: " << &prv_i1 << endl;
        cout << "A::prv_i2 addr: " << &prv_i2 << endl;

        printf("A::prv_foo1() addr: %p\n", (void *)&A::prv_foo1);
        printf("A::prv_foo2() addr: %p\n", (void *)&A::prv_foo2);
    }
    void pub_foo2() {}

    virtual void pub_vfoo1() {}
    virtual void pub_vfoo2() {}

private:
    int prv_i1;
    int prv_i2;

    void prv_foo1() {}
    void prv_foo2() {}
};

class B : public A {

};

int main()
{
    A a;

    cout << "sizeof A: " << sizeof(A) << endl;
    cout << "a addr: " << &a << endl;
    cout << "A::pub_i1 addr: " << &a.pub_i1 << endl;
    cout << "A::pub_i2 addr: " << &a.pub_i2 << endl;

    printf("A::pub_foo1() addr: %p\n", (void *)&A::pub_foo1);
    printf("A::pub_foo2() addr: %p\n", (void *)&A::pub_foo2);
    printf("A::pub_vfoo1() addr: %p\n", (void *)&A::pub_vfoo1);
    printf("A::pub_vfoo2() addr: %p\n", (void *)&A::pub_vfoo2);

    a.pub_foo1();

    void **__vptr = (void **)&a;
    void **virtual_table = (void **)(*__vptr);
    printf("virtual table[0]: %p\n", virtual_table[0]);
    printf("virtual table[1]: %p\n", virtual_table[1]);
//IT刘小虎 
    return 0;
}