s6_81.c

水电出版社的《C/C++程序设计教程》源代码

#include "stdio.h"
struct byte
{ unsigned int a1: 1;
  unsigned int a2: 1;
  unsigned int a3: 1;
  unsigned int a4: 1;
  unsigned int a5: 1;
  unsigned int a6: 1;
  unsigned int a7: 1;
  unsigned int a8: 1;
};
union bits
{char ch;
struct byte bit;
};
main()
{ union bits b;
  do 
  { b.ch=getchar();
    decode(b);
  }
  while(b.ch!=′q′);
}
void decode (union bits asc)
{ printf(asc.bit.a8 ? "1": "0");
  printf(asc.bit.a7 ? "1": "0");
  printf(asc.bit.a6 ? "1": "0");
  printf(asc.bit.a5 ? "1": "0");
  printf(asc.bit.a4 ? "1": "0");
  printf(asc.bit.a3 ? "1": "0");
  printf(asc.bit.a2 ? "1": "0");
  printf(asc.bit.a1 ? "1": "0");
  printf("\n");
}