6

Boolean functions

  1. #include <stdio.h>
  2. #include <ctype.h>
  3.  
  4. void pctype( int c ) {
  5.     printf( "%3d(%02X)\t'%c' is a ", c, c, c );
  6.     if ( isdigit( c ) )
  7.         printf("digit");
  8.     else if ( islower( c ) )
  9.         printf("small letter");
  10.     else if ( isupper( c ) )
  11.         printf("capital letter");
  12.     else if ( isspace( c ) )
  13.         printf("space");
  14.     else if ( iscntrl( c ) )
  15.         printf("control");
  16.     else if ( ispunct( c ) )
  17.         printf("punctuation");
  18.     else
  19.         printf("mistery");
  20.     printf(".\n");
  21. }
  22.  
  23. main() {
  24.     int c;
  25.  
  26.     for ( c = 0; c < 128; ++c )
  27.         pctype(c);
  28. }

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