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isgraph()                Test for Printable Character Except Space

 #include   <ctype.h>

 int        isgraph(c);
 int c;     Integer value to be tested

    isgraph() tests if 'c' is a printable character. The space character
    (' ') is not considered a printable character.

    Returns:    True (nonzero) if the integer satisfies the test
                condition or false (zero) if it does not.  The result is
                undefined if 'c' is other than an ASCII character or EOF.

      Notes:    isgraph() is a macro.

  -------------------------------- Example ---------------------------------

    The following statements read characters from a file until a space or
    non-printable character is encountered.

         #include <ctype.h>
         #include <stdio.h>           /* for fopen */

         FILE *stream;
         char buffr[80];
         int ch, x = 0;

         main()
         {
             if ((stream = fopen("input.dat","r+")) != NULL) {
                while (isgraph(ch = fgetc(stream)))
                      buffr[x++] = ch;
             }
         }