On Tue Nov 22, 2005 at 17:35:23 +1100, Benno wrote:
>On Tue Nov 22, 2005 at 13:51:59 +0800, [EMAIL PROTECTED] wrote:
>>Ummmm ...
>>
>>Coding 3.
>>#include <stdio.h>
>>#include <stdlib.h>
>>#include <string.h>
>>char *
>>somefunction()
>>{
>> char *string2 = "some words";
>> return string2;
>>}
>>int main (void)
>>{
>> char *string;
>> string = somefunction();
>> printf ("\n\nString is: %s\n\n", string);
>> return 0;
>>}
>>
>>somefunction returns string2 which is trash!
>>formally: The scope of string2 does not extend to main!
>>(even if it works, and it might, it's WRONG)
>
>"some words" will be allocated in the .rodata section not on the stack
>so it will actually work. (Not that I'd recommend doing this!!).
>
>I can't find anything in the C spec about return the address of a string
>literal,
>it doesn't say wether it is allowed or not.
I can't actually find it in the C spec but from googling it does appear
that string literals are constants with static storage duration which
means they have lifetime of the program.
(But I still wouldn't use that style, it is confusing at best.)
Benno
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