C/C++ Users Group Library 1997 August/Walnut Creek CDROM.7z/VOL_100/163_01/ISALNUM.C

Text File | 1988-01-29 | 384 b | 9 lines

/*
** isalnum -- true if argument is valid ASCII alphabetic or digit
*/
isalnum(c) char c; {
  if((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
      (c >= '0' && c <= '9')) return 1;
  else return 0;
  }