GTK program

wa;ngyz

sorry ,i am a new for linux, i do not know how to display chinese in my system.  i had to type english,
i am learnning GTK , i make a example named t.c.
the source is
#include <gtk/gtk.h>

int main (int argc, char *argv[])
{
    GtkWidget *window;
    gtk_init (&argc, &argv);
    window = gtk_window_new   (GTK_WINDOW_TOPLEVEL);
    gtk_widget_show (window);
    gtk_main ();
    return 0;
}

gcc -Wall -g t.c -o hello_world -L/usr/X11R6/lib -lglib -lgdk -lgtk -lX11 -lXext -lm

  but the system hint me:
  gdk/gdk.h: No such file or directory

  why? thanks

mozilla

gcc t.c -o hello_world `gtk-config --libs --cflags`

wa;ngyz

thanks ,if i write the file named t.cpp.
should i do.

mozilla

g++