NetNews Offline 2/NetNews Offline Volume 2.iso/news/comp/lang/c-part1/946

Internet Message Format | 1996-08-05 | 2.0 KB

Path: lrz-muenchen.de!sun2!ua302aa
From: [e-mail] (Kurt Watzka)
Newsgroups: comp.lang.c
Subject: Re: To malloc (new) or not to malloc? When is the question.
Date: 10 Jan 1996 12:08:25 GMT
Organization: Leibniz-Rechenzentrum, Muenchen (Germany)
Distribution: world
Message-ID: <4d0a7p$[e-mail]>
References: <4ctvk3$[e-mail]> <[e-mail]>
NNTP-Posting-Host: sun2.lrz-muenchen.de

[e-mail] (Paul I. Wolf ) writes:

>In article <4ctvk3$[e-mail]>, [e-mail]
>(Darrin Smith) wrote:
>[snip]
>> Why is it that you can do something like the following:
>>         char *x;
>>         x="Some really long string with no particular meaning";
>First example is incorrect. You may be thinking of declaring with initializing:
>   char* x = "Some really long string with no particular meaning";

There is nothing "incorrect" about the code posted by Mr. Smith, afaik.
You may assign a pointer to char to a variable of that type without
any special measures, and there is no need to do that in the initialization
of that variable.

>Same thing works for second example if you initialize with constants:
>   struct st1{char one[10];
>              char two[20];
>              char three[10];
>              }* sptr= {0};

>The point is that memory allocatiion during initialization is required if
>you want the pointer to "automatically" point to memory which can be used.

This is _not_ the point in the first example. A pointer to char was
declared. So, space for that pointer has been reserved. The pointer
does not point to a specific memorz location. The assignment changes
the value of the variable "x". No problem there.

>In your first example, the "x=" is NOT valid syntax for a sequence of
>characters.

It is a valid assignment of a pointer to char.

Kurt
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