Re: [Dev-C++] Problems with arrays of pinters

[Per W. <pw...@ia...>]

Correct.

/Per W

On Wed, 17 Sep 2003, Esteban Valverde wrote:

> So... char *str2 = "sldfksf" must be undertaken like a read-only string,
> whereas char str2[ ] = "sldfksf" is a read-write string ?
>
> ----- Original Message -----
> From: "Per Westermark" <pw...@ia...>
> To: "Esteban Valverde" <est...@ho...>
> Cc: "dev-cpp" <dev...@li...>
> Sent: Wednesday, 17 September, 2003 16:24 PM
> Subject: Re: [Dev-C++] Problems with arrays of pinters
>
>
> Note that when you declare a text string as
>
> char *str2 = "sldfksf"
>
> str2 is only a pointer to a text. Most compilers will place the text in
> read-only memory, i.e. if you try to follow the pointer to change the
> text, you will get a memory access violation.
>
> If you want to change a text you must use the array form of declaration.
>
> /Per W
>
> On Wed, 17 Sep 2003, Esteban Valverde wrote:
>
> > Hi, the next code has an running error, non a compiler error. Anybody can
> > understand it ?
> >
> > thanks, Esteban
> >
> >
> > char str1[] = "Hello, how ";
> > char *str2  = "are you ?";
> >
> > char *pstr[2];
> >
> > // these works fine...
> > pstr[0] = str1;
> > pstr[1] = str2;
> >
> > // these works fine...
> > printf("%s%s\n", pstr[0], pstr[1]);
> >
> > // these works fine...
> > if(*pstr[0] == 'H')
> >   printf("\"%s\" start with 'H'\n", pstr[0]);
> >
> > if(*pstr[1] != 'x')
> >   printf("\"%s\" don't start with 'X'\n", pstr[1]);
> >
> > // I'm attempting to increment 'H' to 'I'.
> > // these works fine...
> > (*pstr[0])++;
> > printf("%s\n", pstr[0]);
> >
> > // I'm attempting to increment 'a' to 'b'.
> > // these, doesn't works fine...
> > // these halts the computer... the same with (*(pstr[1]))++
> > (*pstr[1])++;
> > printf("%s\n", pstr[1]);
> >
> >
> >
> >
> >
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>
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