脳みそ整理用

offset.cpp

#include "stdafx.h"
#include <iostream>

struct Klass {
	int value;
};

struct Data {
	int value;
	Klass *klass;
	Data () {
		value = 1;
	}
};

int _tmain(int argc, _TCHAR* argv[])
{
	Data *data = new Data();
	size_t ptr_size = sizeof(data->klass); // 4
	size_t int_size = sizeof(data->value); // 4
	size_t data_size = sizeof(*data); // 8

	void* address = (void*) &(((Data*)0)->klass);
	Data* zeroData = (Data*)0;
	void* offset = (void*) &(zeroData->klass);

	return 0;
}