ishex(3C) — DG/UX 4.30



     ishex(3C)                  DG/UX 4.30                   ishex(3C)



     NAME
          ishex - Determine if a character is hexadecimal.

     SYNOPSIS
          #include <ctype.h>

          int c, result;
          result = ishex(c);

     DESCRIPTION
          Use the ishex macro to determine if a character is a
          hexadecimal.  Hexadecimals are 0 - 9 and a - f or A - F.

          The ishex macro is the same as the isxdigit macro.

          Do not try to redeclare this macro or you might get
          unexpected results.

     RETURNS
          The ishex macro returns a nonzero value if the character is
          hexadecimal.  Otherwise, it returns 0.

     SEE ALSO
          See also the isxdigit and isdigit macros.

     EXAMPLE
          /* Program test for the ishex() macro */

          #include <ctype.h>
          #include <stdio.h>

          int  i = 1, result;

          main(argc, argv)
          int     argc;
          char    *argv[];
          {
              while (i < argc) {
                  printf("Is %c a hexadecimal digit?  ", argv[i][0]);
                  printf("%s.\n",
                  (result = ishex(argv[i][0])) == 0 ? "No" : "Yes");
                  i++;
              }
          }

          A call to the program test with A, f, g, and H generates the
          output

          Is A a hexadecimal digit?  Yes.
          Is f a hexadecimal digit?  Yes.
          Is g a hexadecimal digit?  No.
          Is H a hexadecimal digit?  No.



     Licensed material--property of copyright holder(s)         Page 1
Museum
