通过虚函数指针调用虚函数

平台为VS2022，C++14。

很疑惑，明明测试long*指针为8字节，结果获取虚函数地址却还是以4字节作为偏差，不是很懂

#define _CRT_SECURE_NO_WARNINGS
#include 
using namespace std;

class Father
{
    virtual void FatherFun1() { cout << "FatherFun1" << endl; }
    virtual void FatherFun2() { cout << "FatherFun2" << endl; }
    virtual void FatherFun3() { cout << "FatherFun3" << endl; }
};

typedef void (*Fun)(void);

int main()
{
    Father father;
    cout << "类对象地址：" << &father << endl;
    cout << "虚函数表地址: " << (long long*)*(long long*)&father << endl;
    cout << "虚函数FatherFun1地址：" << (long long*)*(long long*)&father << endl;
    cout << "虚函数FatherFun2地址：" << (long long*)*(long long*)&father + 1 << endl;
    cout << "虚函数FatherFun3地址：" << (long long*)*(long long*)&father + 2 << endl;
    cout << sizeof(long long*) << endl;
    cout << "测试地址是否正确" << endl;
    Fun fun = (Fun)*((long long*)*(long long*)&father);
    fun();
    fun = (Fun)*((long long*)*(long long*)(&father) + 1);
    fun();
    fun = (Fun)*((long long*)*(long long*)(&father) + 2);
    fun();
}