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  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. typedef enum {
  5.  ONE = 0x1,
  6.  TWO = 0x2,
  7.  THREE = 0x4,
  8.  FOUR = 0x8,
  9. } options;
  10.  
  11. static const char *byte_to_binary (int x)
  12. {
  13.   int z;
  14.   static char b[9];
  15.   b[0] = '\0';
  16.  
  17.   for (z = 256; z > 0; z >>= 1)
  18.     {
  19.     strcat(b, ((x & z) == z) ? "1" : "0");
  20.     }
  21.  
  22.   return b;
  23. }
  24.  
  25. int main(int argc, char *argv[])
  26. {
  27.   options o = 0;
  28.   printf( "%s\n", byte_to_binary(o));
  29.   o |= ONE;
  30.   printf( "%s\n", byte_to_binary(o));
  31.   o |= TWO;
  32.   printf( "%s\n", byte_to_binary(o));
  33.   o |= THREE;
  34.   printf( "%s\n", byte_to_binary(o));
  35.   o |= FOUR;
  36.   printf( "%s\n", byte_to_binary(o));
  37.   o &= ~FOUR;
  38.   printf( "%s\n", byte_to_binary(o));
  39.   o &= ~THREE;
  40.   printf( "%s\n", byte_to_binary(o));
  41.   o &= ~TWO;
  42.   printf( "%s\n", byte_to_binary(o));
  43.   o &= ~ONE;
  44.   printf( "%s\n", byte_to_binary(o));
  45.  
  46.   return 0;
  47. }
Runtime error #stdin #stdout 0.01s 1904KB
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Standard input is empty
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Standard output is empty
https://ideone.com/OtJnS
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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