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Mail Archives: djgpp/2000/04/29/10:38:41

From: jstacey AT plato DOT wadham DOT ox DOT ac DOT uk (J-P)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Weird : Segmentation fault on fwrite :(
Date: 29 Apr 2000 15:47:46 +0100
Organization: Wadham College Oxford
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

>J-P wrote:
>
>>	If char arrayname[80] is an array of 80 char,
>>	 . arrayname is (equivalent to) a pointer to the first char
>>	 . &arrayname is a pointer to a pointer to the first char
>
>No.

Ah. This is the relevant bit from K&R. Appendix A7.3 - Postfix
Expressions (subsequently "PE"s).

	A7.3.1 Array References

	A PE followed by an E in square brackets { i.e. PE[E] - jps } is a
	postfix expression denoting a subscripted array reference. One of
	the two expressions must have type "pointer to T", where T is some
	type, and the other must have integral type. 

So in my example, "arrayname" /is/ of type "pointer to char". Isn't it?
According to K&R, at least, there seems no ambiguity.

Perhaps the printf family of functions is clever and recognises pointer to
pointer, and the standard libraries allow gcc to compile equivalent
executables. Any idea? Have I interpreted K&R wrong, do K&R slip up at
this point, or is gcc/printf doing something wiley?

If anyone wants to suggest a more relevant newsgroup, I'd happily follow
this there, trn willing.

J-P
-- 
Sacred Message // adopted by Japanese family // living next to NASA //
obscene orange flower // chance meeting with Ted Bundy 

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