🚀 go-pugleaf

Why make is so specific?  A better solution, IMHO, is the following:

/* ---------- Cut here ---------- */
#include <stdio.h>
#include <string.h>

main(argc,argv)
   int argc;
   char *argv[];
{
   char input;

   if (argc>2) {
      puts("Syntax:  ONECHAR [verify]");
      putchar('\n');
      puts("verify - an optional string of valid input characters.");
      puts("         If omitted, any character is considered valid.");
      puts("         The characters are case-insensitive.");
      putchar('\n');
      puts("ONECHAR returns the character pressed as the return code.");
      exit(2);
   } else 
   if (argc==2) {
      strupr(argv[1]);
   } /* endif */

   do {
      input=getchar();
      if ((argc==2) && (strchr(argv[1],input)!=NULL)) {
         argc==1;
      } /* endif */
   } while (argc!=1);

   return input;
}

/* ---------- End of cut -------- */

(Hmm...That looks correct, but of course I typed it in on the fly and so it
hasn't been compiled/tested/etc.)  As the help text indicates, ONECHAR 
accepts an optional string which is a list of valid characters.  The character
pressed is returned as the return code, which can be tested by ERRORLEVEL
in a batch file.

Have fun...(Please let me know if I made any mistakes)...

Cheers,
Q