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From: john@chinet.chi.il.us (John Mundt)
Newsgroups: comp.lang.c
Subject: Re: main() - argc,argv
Message-ID: <1989Nov30.204932.15705@chinet.chi.il.us>
Date: 30 Nov 89 20:49:32 GMT
References: <1093@nsscb.UUCP>
Reply-To: john@admctr.chi.il.us (John Mundt)
Organization: Chinet - Chicago Public Access UNIX
Lines: 28

In article <1093@nsscb.UUCP> nrg@nsscb.UUCP (G.Narotham Reddy) writes:
>
>I would like to know what happens if main() is passed more than two arguments?
>

It is passed three by convention.  It gets an environmental pointer to
an array of characters representing the environment (like what you see
when typing "env" and is where getenv() gets its data.  Thus, although
you don't often see it, you could correctly write main as

main(argc, argv, envp)
int argc;
char **argv, **envp;
{
}

Also by convention, an external array pointer is available, namely 

extern char **environ;

which points to the same envp listed above.


-- 
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John Mundt   Teachers' Aide, Inc.  P.O. Box 1666  Highland Park, IL
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