程序编译通过了，但运行的时候出错了，是什么原因？

Master

对着书本上的输的，编译通过了，运行的时候出现这样的提示：
/etc/gtk-2.0/gtkrc:6: error: invalid string constant "default", expected valid string constant
Segmentation fault

附程序：
#include <gtk/gtk.h>

void
on_button_clicked (GtkWidget *button,gpointer data)
{
        g_print("按钮 %s",(gchar*)data);       
//g_print("Button %s is pressed.\n",(gchar*)data);
}

GtkWidget* create_button1(void)
{
        GtkWidget* box;
        GtkWidget* image;
        GtkWidget* label;
        GtkWidget* button;
        char* title="红苹果";
        image=gtk_image_new_from_file("apple-red.png");
        label=gtk_label_new(title);
        box =gtk_vbox_new(FALSE,2);
        gtk_container_set_border_width(GTK_CONTAINER(box),5);
        gtk_box_pack_start(GTK_BOX(box),image,FALSE,FALSE,3);
        gtk_box_pack_start(GTK_BOX(box),label,FALSE,FALSE,3);
        gtk_widget_show(image);
        gtk_widget_show(label);
        button=gtk_button_new();
        gtk_container_add(GTK_CONTAINER(button),box);
        gtk_widget_show(box);
        return button;
}

GtkWidget* create_button2(void)
{
        GtkWidget* box;
        GtkWidget* image;
        GtkWidget* label;
        GtkWidget* button;
        char* title="小蘑菇";
        image=gtk_image_new_from_file("gnome-gmush.png");
        label=gtk_label_new(title);
        box =gtk_vbox_new(FALSE,2);
        gtk_container_set_border_width(GTK_CONTAINER(box),5);
        gtk_box_pack_start(GTK_BOX(box),image,FALSE,FALSE,3);
        gtk_box_pack_start(GTK_BOX(box),label,FALSE,FALSE,3);
        gtk_widget_show(image);
        gtk_widget_show(label);
        button=gtk_button_new();
        gtk_container_add(GTK_CONTAINER(button),box);
        gtk_widget_show(box);
        return button;
}

int main(int argc,char* argv[])
{
        GtkWidget* window;
        GtkWidget* box;
        GtkWidget* button1;
        GtkWidget* button2;
        GtkWidget* button3;
        GtkWidget* button4;
        gchar* title ="带图像和快捷键的按钮";
        gchar* b1="Red apple";
        gchar* b2="Small mushroom";
        gchar* b3="Short key";
        gchar* b4="Ok";
        gtk_init(&argc,&argv);
        window=gtk_window_new(GTK_WINDOW_TOPLEVEL);
        gtk_window_set_title(GTK_WINDOW(window),title);
        gtk_container_set_border_width(GTK_CONTAINER(window),20);
        g_signal_connect(G_OBJECT(window),"destroy",G_CALLBACK(gtk_main_quit),NULL);
        box=gtk_hbox_new(FALSE,0);
        gtk_container_add(GTK_CONTAINER(window),box);
        button1=create_button1();
        g_signal_connect(G_OBJECT(button1),"clicked",G_CALLBACK(on_button_clicked),(gpointer)b1);
        gtk_box_pack_start(GTK_BOX(box),button1,FALSE,FALSE,5);
        button1=create_button2();
        g_signal_connect(G_OBJECT(button1),"clicked",G_CALLBACK(on_button_clicked),(gpointer)b2);
        gtk_box_pack_start(GTK_BOX(box),button2,FALSE,FALSE,5);
        button3=gtk_button_new_with_mnemonic("快捷键(_H)");
        g_signal_connect(G_OBJECT(button3),"clicked",G_CALLBACK(on_button_clicked),(gpointer)b3);
        gtk_box_pack_start(GTK_BOX(box),button3,FALSE,FALSE,5);
        button4=gtk_button_new_from_stock(GTK_STOCK_OK);
        g_signal_connect(G_OBJECT(button4),"clicked",G_CALLBACK(on_button_clicked),(gpointer)b4);
        gtk_box_pack_start(GTK_BOX(box),button4,FALSE,FALSE,5);
        gtk_widget_show_all(window);
        gtk_main();
        return FALSE;
}

kj501

/etc/gtk-2.0/gtkrc的第6行是不是有什么问题？

Master

/etc/gtk-2.0/gtkrc文件如下：
style "user-font"
{
font_name="Tahoma,Simsun 9"
}

widget_class "*" style "default"

这个default有什么问题吗？

masterdemon

1. 
   
2. ...
   
3. button1=create_button1();
   
4. g_signal_connect(G_OBJECT(button1),"clicked",G_CALLBACK(on_button_clicked),(gpointer)b1);
   
5. gtk_box_pack_start(GTK_BOX(box),button1,FALSE,FALSE,5);
   
6. button1=create_button2();
   
7. g_signal_connect(G_OBJECT(button1),"clicked",G_CALLBACK(on_button_clicked),(gpointer)b2);
   
8. gtk_box_pack_start(GTK_BOX(box),button2,FALSE,FALSE,5);
   
9. ...
   

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你是存心来考我们眼力是不是？
以上几行你看有什么错？
实际上button2更本没有被创建，你就去用了。不错才怪呢。
这样就可以了。

1. 
   
2. ...
   
3. button1=create_button1();
   
4. g_signal_connect(G_OBJECT(button1),"clicked",G_CALLBACK(on_button_clicked),(gpointer)b1);
   
5. gtk_box_pack_start(GTK_BOX(box),button1,FALSE,FALSE,5);
   
6. button2=create_button2();
   
7. g_signal_connect(G_OBJECT(button2),"clicked",G_CALLBACK(on_button_clicked),(gpointer)b2);
   
8. gtk_box_pack_start(GTK_BOX(box),button2,FALSE,FALSE,5);
   
9. ...
   

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