1 #include <stdio.h>
   2 
   3 union char2bits {
   4   char byte;
   5   struct {
   6     unsigned char b0:1;
   7     unsigned char b1:1;
   8     unsigned char b2:1;
   9     unsigned char b3:1;
  10     unsigned char b4:1;
  11     unsigned char b5:1;
  12     unsigned char b6:1;
  13     unsigned char b7:1;
  14   } bits;
  15 };
  16 
  17 void imprimir_bits (char b);
  18 
  19 int main (void)
  20 {
  21 
  22   imprimir_bits(42);
  23 
  24   return 0;
  25 }
  26 
  27 void imprimir_bits (char b)
  28 {
  29   union char2bits c2b;
  30 
  31   c2b.byte = b;
  32 
  33   printf("%d %d %d %d %d %d %d %d\n", c2b.bits.b7,c2b.bits.b6,c2b.bits.b5,c2b.bits.b4,
  34                                       c2b.bits.b3,c2b.bits.b2,c2b.bits.b1,c2b.bits.b0);
  35 }