关于C语言位段的理解？

ID:69265 · 发表于 2016-7-11 19:29

#ifndef USERMACROS.H
typedef unsigned char uint8;
typedef union bitdef{
                           unsigned char byte;
                           struct{
                                       unsigned char  d0:1;
                                       unsigned char  d1:1;
                                       unsigned char  d2:1;
                                       unsigned char  d3:1;
                                       unsigned char  d4:1;
                                       unsigned char  d5:1;
                                       unsigned char  d6:1;
                                       unsigned char  d7:1;
                                    }bits;
                           }BitD;
#define TRUE 1
#define FAUSE 0
请问这段函数怎么理解，求大神指教！