转 求结构体偏移

原文出处忘记了。。。

此宏很神奇

#define FIND(structTest,e) (size_t)&(((structTest*)0)->e)

 

struct test
{
int a;
int b;
char c;
int d;
};
size_t s = FIND(test,a);
cout<<s<<endl;  //输出结构体偏移

转载于:https://www.cnblogs.com/zhangdongsheng/archive/2013/05/08/3066605.html

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