??2. Ａ、Ｂ、Ｃ、Ｄ、Ｅ五名学生有可能参加计算机竞赛，根据下列条件判断哪些
??人参加了竞赛：
?? （１）Ａ参加时，Ｂ也参加；
?? （２）Ｂ和Ｃ只有一个人参加；
?? （３）Ｃ和Ｄ或者都参加，或者都不参加；
?? （４）Ｄ和Ｅ中至少有一个人参加；
?? （５）如果Ｅ参加，那么Ａ和Ｄ也都参加。
#include <stdio.h>

struct bit
{
unsigned int a:1;
unsigned int b:1;
unsigned int c:1;
unsigned int d:1;
unsigned int e:1;
};
union match
{
 unsigned char i;
 struct bit matcher;
};
int main(int argc,char* argv[])
{
 union match thematch;
 thematch.i=0;
 int i=0;
 while(i++<32)
 {
  if(
   ((!thematch.matcher.a)||(thematch.matcher.a&&thematch.matcher.b))  &&//true
   ((thematch.matcher.b&&!thematch.matcher.c)||(!thematch.matcher.b&&thematch.matcher.c)) && //true
   ((thematch.matcher.c&&thematch.matcher.d)||(!thematch.matcher.c&&!thematch.matcher.d)) &&  //true
   (thematch.matcher.d||thematch.matcher.e) &&     //true 
   ((thematch.matcher.e&&thematch.matcher.a&&thematch.matcher.d)||!thematch.matcher.e)
   
   )
  {
   printf("%d\t%d\t%d\t%d\t%d\t\n",thematch.matcher.a,thematch.matcher.b,thematch.matcher.c,thematch.matcher.d,thematch.matcher.e);
  }
     thematch.i++;
 }
 return 0;
}
/*
0       0       1       1       0

Terminated with return code 0
Press any key to continue ...

*/