位域测试

最新推荐文章于 2024-01-22 08:15:00 发布

gyymen

最新推荐文章于 2024-01-22 08:15:00 发布

阅读量528

点赞数

CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/gyymen/article/details/53534233

Others 专栏收录该内容

35 篇文章

订阅专栏

/********************************************************************
   purpose: 位域测试
   author: dotlive
*********************************************************************/
#include <iostream>
using namespace std;

union
{
   struct
   {
       char i:1;
       char j:2;
       char m:3;
   }s;

   char ch;
}r;

struct
{
   char i:1;
   char j:2;
   char m:3;
}node;

int main()
{
   r.s.i = 1;
   r.s.j = 2;
   r.s.m = 3;
// |m |j |i
// |11 |10 |1

   node.i = 'm';
   node.j = 3.1415926;
   node.m = 100;

   cout<<"r.ch = "<<(int)r.ch<<" = 0x"<<hex<<(int)r.ch<<endl
       <<"sizeof(r) = "<<sizeof(r)<<endl;
   cout.unsetf(ios::hex);
   cout<<"sizeof(node) = "<<sizeof(node)<<endl;

   return 0;
}