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From: rmariani@watmum.UUCP (Rico Mariani)
Newsgroups: comp.sys.amiga
Subject: Re: argv[n][n] doesn't exist
Message-ID: <720@watmum.UUCP>
Date: Sat, 6-Dec-86 08:38:14 EST
Article-I.D.: watmum.720
Posted: Sat Dec  6 08:38:14 1986
Date-Received: Sun, 7-Dec-86 03:42:40 EST
References: <816@ulowell.UUCP>
Reply-To: rmariani@watmum.UUCP (Rico Mariani)
Organization: U of Waterloo, Ontario
Lines: 33

In article <816@ulowell.UUCP> walton@ametek.UUCP (Steve Walton) writes:
>Ahem...argv is not a two dimensional array, but rather an array of pointers.
>As such, it CANNOT be addressed with two subscripts as argv[n][n].  There
>is a difference, see K&R for details.  The correct way to find the \0 at
>the end of the j'th argument is:
>	char *s;
>	s = argv[j];
>	for (i = 0; s[i] != '\0'; i++);		/* i is now length of arg j */
>If I badly misunderstood Bill's posting and have therefore insulted
>everyone's intelligence, forgive me.


Bzzzt WRONG!

The first part about argv not being a two dimensional array is correct
(sorf of) but there is nothing wrong(!) with accessing it as

	argv[i][j]

to the the j-th character of the i-th string, provide that i<argc and
j is not off the end of the string in question.

Mind you, if I were trying to find the \0  I would do it much the
same way as Stephen does in his example just because its more efficient
that two subscripts (no compiler optization cracks please)

But the best way to find the zero is this:

	i = strlen(argv[j]);

works every time :-)

		-Rico