Il 01/12/2013 21:01, Alberto Zichittella ha scritto:
> This message dialog causes a strange behavior on my program. It seems
> that the call to gtk_message_dialog_new() change the value of the const
> gchar* pointer, last parameter.
>
> Furthermore, the value of the const gchar* variable "message" change
> from "Il risultato e' -number-" to "Il risult(", I don't know why.
> I know that the call changes the value (and the address) of message
> because I use gdb.
>
> I develope on ubuntu gnome 13.10 using Code::Blocks , on a 64bit system,
> with gtk+-3.0
>
>
> const gchar* message;
> /*the function risolviFormat() create a gchar* pointer, using malloc
> to allocate memory */
> message = espressione->risolviFormat(); //message is, for example,
Try this substitution:
gchar *message;
message = g_strdup_printf("Il risultato e': %f", result);
dialog = gtk_message_dialog_new(NULL,
GTK_DIALOG_DESTROY_WITH_PARENT,
GTK_MESSAGE_INFO,
GTK_BUTTONS_OK,
(const gchar *)message);
> "Il risultato e' 789"
> dialog = gtk_message_dialog_new (NULL,
> GTK_DIALOG_DESTROY_WITH_PARENT,
> GTK_MESSAGE_INFO,
> GTK_BUTTONS_OK,
> message);
> /*now message is "Il risult("
> gtk_window_set_position(GTK_WINDOW(dialog),GTK_WIN_POS_CENTER_ALWAYS);
> gtk_dialog_run (GTK_DIALOG (dialog));
> gtk_widget_destroy (dialog);
> /*this call causes a segfault because message pointer changed his
> value */
> free(message);
> return;
>
> --
>
>
> Mio blog: http://newbufferedwriter.blogspot.com/
> http://prodigious.altervista.org/Scrobblit/index.php
>
>
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>
--
Hofstadter's Law:
"It always takes longer than you expect, even when you take into account
Hofstadter's Law."
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