结构体位计算

struct OFFSETA

{
　　char a;
　　short b;
　　int d;
　　int c;
};
#define FIND(struct,e) (size_t)&(((OFFSETA *)0)->e)

 

std::cout << FIND(OFFSETA, a) << ":" << FIND(OFFSETA, b) << ":" << FIND(OFFSETA, c) << ":" << FIND(OFFSETA, d);