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> But, did you (or anyone) understand what happened?
I know what is the problem (I've had it lots of times when I was new to C), but I can't explain it. I've writtensomething that looks like your problem and could be also a solution (without having to allocate new memory). Perhaps youcan find out what you have to change to your code (only very few lines actually)
#include <stdio.h>#include <string.h>
int main(void){ int a11 = 11, a12 = 12, a21 = 21, a22 = 22; int *matrix[2][2] = { { &a11, &a12}, { &a21, &a22} };
int i, j;
for(i = 0; i < 2; ++i) for(j = 0; j < 2; ++j) printf("matrix[%d][%d] = %d @ %p\n", i,j, *(matrix[i][j]), matrix[i][j]);
void *ptr = matrix; /* what you did with pacote2 */
...
/* this could also be in another function where the dimension of the matrix is well known */ int *new_matrix[2][2]; /* the main part! */ memmove(new_matrix, ptr, sizeof(int[2][2])); for(i = 0; i < 2; ++i) for(j = 0; j < 2; ++j) printf("new_matrix[%d][%d] = %d @ %p\n", i,j, *(new_matrix[i][j]), new_matrix[i][j]);
return 0;}
RegardsPablo
Pablo Yánez Trujillohttp://klingsor.informatik.uni-freiburg.de/My public key: http://klingsor.informatik.uni-freiburg.de/gpg/supertux.asc
Carlos Pereira wrote:> WOW! Dimitrov!!!> > Worked perfectly!!!!> > Thanks very very much!!!> > But, did you (or anyone) understand what happened?> > You have used another way to build a matrix (an array of arrays). Why> not the original matrix worked?> > Well, anyway, thanks a lot again!> > Best regards!> > Carlos> > > > On Sun, Oct 26, 2008 at 6:34 PM, �ОЌО��Пв ���е�лав <bordimida@xxxxxxx> wrote:>> On Sun, 26 Oct 2008 21:01:29 +0300, Carlos Pereira <carlao2005@xxxxxxxxx>>> wrote:>>>>> Is there any difference in the way c++ treats matrices, from how c treats>>> them??>>>>> I try to define drops_regras with calloc and code work correctly, but may be>> i don't understand you right:>>>> GtkWidget ***drops_regras = NULL;>> int j;>> drops_regras = (GtkWidget ***)calloc(MAIN_nregras,>> sizeof(GtkWidget**));>> for(j=0; j < MAIN_nregras; j++)>> {>> drops_regras[j] = (GtkWidget **)calloc(MAIN_narq_ent + 1,>> sizeof(GtkWidget*));>> }>>>> =======================================>> Full my example:>>>> void processa_sistema(GtkWidget *widget, gpointer pacote[])>> {>> GtkWidget ***drops_regras = (GtkWidget ***)pacote[0];>> printf( "%d\n", gtk_combo_box_get_active(>> GTK_COMBO_BOX(drops_regras[0][0] ) ) );>>>> }>>>> int main (int argc, char* argv[])>> {>> int MAIN_nregras = 6;>> int MAIN_narq_ent = 3;>> gtk_init (&argc, &argv);>>>> GtkWidget *main_table = gtk_table_new(MAIN_nregras, MAIN_narq_ent,>> true);>> GtkWidget ***drops_regras = NULL;>> int j;>> drops_regras = (GtkWidget ***)calloc(MAIN_nregras,>> sizeof(GtkWidget**));>> for(j=0; j < MAIN_nregras; j++)>> {>> drops_regras[j] = (GtkWidget **)calloc(MAIN_narq_ent + 1,>> sizeof(GtkWidget*));>> }>> GtkAttachOptions gtk_attach_options_x;>> GtkAttachOptions gtk_attach_options_y;>> int coluna, linha;>>>> for(coluna=0; coluna < MAIN_narq_ent + 1; coluna++)>> {>> for(linha=0; linha < MAIN_nregras; linha++)>> {>> drops_regras[linha][coluna] = gtk_combo_box_new();>> gtk_table_attach(GTK_TABLE(main_table),>> GTK_WIDGET(drops_regras[linha][coluna]),>> coluna + 1,>> coluna + 2,>> linha + 1,>> linha + 2,>> gtk_attach_options_x,>> gtk_attach_options_y,>> 1, 5);>> }>> }>>>> gpointer pacote2[1];>> pacote2[0] = drops_regras;>>>> GtkWidget *button = gtk_button_new_with_label ("Press");>> g_signal_connect(G_OBJECT(button), "clicked",>> G_CALLBACK(processa_sistema), pacote2);>> GtkWidget* vbox = gtk_vbox_new (FALSE, 0);>>>> GtkWidget *main_window = create_window ();>> gtk_box_pack_start (GTK_BOX (vbox), GTK_WIDGET (main_table), TRUE,>> TRUE, 0);>> gtk_box_pack_start (GTK_BOX (vbox), GTK_WIDGET (button), TRUE, TRUE,>> 0);>> gtk_container_add (GTK_CONTAINER (main_window), vbox);>>>> gtk_widget_show_all (main_window);>>>> gtk_main ();>> }>>>> -->>>> Dimitrov V.>> _______________________________________________>> gtk-list mailing list>> gtk-list@xxxxxxxxx>> http://mail.gnome.org/mailman/listinfo/gtk-list>>> > > -----BEGIN PGP SIGNATURE-----Version: GnuPG v2.0.9 (GNU/Linux)
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