draft

#include <iostream>
using namespace std;

class Base
{
        virtual void f() {cout << "f()" << endl;}
        virtual void g() {cout << "g()" << endl;}
        virtual void h() {cout << "h()" << endl;}
};


typedef void(*pFun)(void);
int main()
{
        Base b;
        pFun p = (pFun)*(long *)*(long *)(&b);
        p();
        p = (pFun)*((long *)*(long *)(&b) + 1);
        p();
        p = (pFun)*((long *)*(long *)(&b) + 2);
        p();

        pFun **table  = (pFun **)&b;
        p = table[0][0];
        p();

        p = table[0][1];
        p();

        p = table[0][2];
        p();

        return 0;
}

output:
f
g
h
f
g
h