Re: [Dev-C++] What is wrong

[Jan M. <jan...@vo...>]

    Well, of course. Maybe I am a little bit out of order because of dealing
with C and its pointers now quite intensively.

Thank you anyway

Jan Mura
----- Original Message ----- 
From: "Per Westermark" <pw...@ia...>
To: "Jan Mura" <jan...@vo...>
Cc: <dev...@li...>
Sent: Wednesday, June 06, 2007 7:13 PM
Subject: Re: [Dev-C++] What is wrong


> i is a pointer, i'e an address to a separate memory for storing the
> integer value.
>
> You must first assign an address to i, before you may assign an integer to
> the memory area pointed to by i.
>
> int main() {
>     int *i;
>     i = (int*)malloc(sizeof(int));
>     *i = 1;
>     printf("%d\n",*i);
>     free(i); // release the memory allocated with the malloc() call.
>     return 0;
> }
>
> /pwm
>
> On Wed, 6 Jun 2007, Jan Mura wrote:
>
> > Hello,
> >
> > I would like to ask what is wrong on the following:
> >
> > ...
> > int *i;
> > *i = 1;
> > printf ("%d", *i);
> >
> > ...
> >
> > As I read in
> > Brian W. Kernighan, Denis M. Ritchie it should work.
> >
> > But anyway in my program it prints nothing.
> >
> > If I delete the line
> >
> > *i = 1;
> >
> > it works properly.
> >
> >
> >
> > I am on XP Professional with Dev-Cpp.
> >
> >
> >
> > Thanks
> >
> >
> >
> > Jan Mura
> >
> > jan...@vo...
> >
> >
>
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