Re: Structs

[Michael Rothwell <rothwell holly-springs nc us>]

Several problems that I see;


You're attempting to use a keyword as a variable name here:
> struct_t *struct;

try this instead:

struct_t        *my_widget_struct;

Here, you haven't malloced any memory for your struct:

>     struct_t->widget1 = gtk_widget_new("useless widget 1");
>     struct_t->widget2 = gtk_widget_new("useless widget 2");

If you had said:

struct_t        my_widget_struct; // notice, no "*"

Then you could do this:

my_widget_struct.widget1 = gtk_widget_new("useless widget 1");
my_widget_struct.widget2 = gtk_widget_new("useless widget 2");

If you want to keep using a pointer to your struct, do this:

struct_t        *my_widget_struct;
my_widget_struct=(struct_t *)malloc(sizeof(struct_t));
my_widget_struct->widget1 = gtk_widget_new("useless widget 1");
my_widget_struct->widget2 = gtk_widget_new("useless widget 2");

-M


> Josh 'Gage' wrote:
>
> Hey guys.
>
> I'm trying to organize all my pertinent data widgets into a nice
> structure so that when I have to pass them around to functions it's
> easy on me(the programmer). I'm having a few problems tho...
>
> /***** Example Code */
> typedef struct
> {
>     GtkWidget *widget1;
>     GtkWidget *widget2;
>     ...
> } struct_t;
>
> int main( int argc, char *argv[] )
> {
>     struct_t *struct;
>
>     struct_t->widget1 = gtk_widget_new("useless widget 1");
>     struct_t->widget2 = gtk_widget_new("useless widget 2");
>
>     gtk_widget_show( struct_t->widget1 );
>     gtk_widget_show( struct_t->widget2 );
>     ...
>     g_print( "Quitting Program!\n" );
>     return 0;
> }
> /***** End of Example Code */
>
> this is just a small piece of code, and as such is incomplete in the
> gtk+ api(no init, etc.). please ignore that :)
>
> When i try to compile this, ill usually get an error, and if i dont
> error the compile, i segfault on exit. Any help on this? I would
> REALLY like to organize my data, but this struct makes me want to hit
> it like a red headed step child :(