strange behaviour of lint?

[Dave Decot]

Since you have not provided an external declaration for the function exit(),
lint assumes that in your program, the following declaration is implied:

    extern int exit();

When lint checks the lint library for libc, however, it sees that there it
is declared to return void.

You can get lint to stop this message by adding:

     extern void exit();

before you first use exit().

The function perror() has a similar problem.

NOTE: For ANSI C compilation systems, ignore all of the previous, and use

    #include <stdlib.h>

instead.