【代码】
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/*
version: 1.0 author: hellogiser blog: http://www.cnblogs.com/hellogiser date: 2014/9/25 */ #include "stdafx.h" #include <iostream> using namespace std; #define OFFSET(s,m) ((int)(&(((s*)0)->m))) struct MyStruct { int a; int b; int c; }; void test_offset() { cout << OFFSET(MyStruct, a) << endl; // 0 cout << OFFSET(MyStruct, b) << endl; // 4 cout << OFFSET(MyStruct, c) << endl; // 8 } int main() { test_offset(); return 0; } |
原文：http://www.cnblogs.com/hellogiser/p/struct-offset.html