本文共 427 字，大约阅读时间需要 1 分钟。

#include 
   
    /* *取（结构体）成员偏移量  * */#define offset(TYPE,MEMBER)	((int)&((TYPE *)0)->MEMBER) #pragma pack(1)//设置对其方式为1个字节struct test{	char c;	int n;	int m;	char *ptr;};#pragmaint main(){	int pos = offset(struct test,c);	printf("pos(c) = %d\n",pos);	pos = offset(struct test,n);	printf("pos(n) = %d\n",pos);	pos = offset(struct test,m);	printf("pos(m) = %d\n",pos);	pos = offset(struct test,ptr);	printf("pos(ptr) = %d\n",pos);}
   

转载地址：http://pxuhj.baihongyu.com/