chktri - check for trigraphs in C source code

       Lars Wirzenius, liw@iki.fi.

                                                                                                       CHKTRI(1)

       This  program  looks  for  lines containing trigraphs in C source code.  Trigraphs are a way to represent
       certain characters in C source code as two  question  marks  and  a  third  character.   For  example,  a
       backslash  could  be  represented  as  `??/'.  For a detail specification, see section 5.2.1.1 in the ISO
       9899:1990 standard or any decent C book.  (You don't really want to know.)

       chktri - check for trigraphs in C source code

       chktri [file ...]