Nachbereitung 28.11.2019

20191128/gtk-4.c

@@ -17,6 +17,7 @@ int main (int argc, char **argv)
   GtkWidget *drawing_area = gtk_drawing_area_new ();
   gtk_container_add (GTK_CONTAINER (vbox), drawing_area);
 
+  gtk_widget_show (drawing_area);
   gtk_widget_show (button);
   gtk_widget_show (vbox);
   gtk_widget_show (window);

20191128/gtk-5.c

@@ -16,6 +16,7 @@ int main (int argc, char **argv)
 
   GtkWidget *drawing_area = gtk_drawing_area_new ();
   gtk_container_add (GTK_CONTAINER (vbox), drawing_area);
+  gtk_widget_set_size_request (drawing_area, 100, 100);
 
   gtk_widget_show (drawing_area);
   gtk_widget_show (button);

20191128/higher-math-1.c

+#include <stdio.h>
+
+#define VIER 4
+
+int main (void)
+{
+  printf ("Drei mal vier = %d.\n", 3 * VIER);
+  return 0;
+}

20191128/higher-math-2.c

+#include <stdio.h>
+
+#define VIER vier
+
+int main (void)
+{
+  printf ("Drei mal vier = %d.\n", 3 * VIER);
+  return 0;
+}

20191128/higher-math-3.c

+#include <stdio.h>
+
+#define VIER 4);
+
+int main (void)
+{
+  printf ("Drei mal vier = %d.\n", 3 * VIER
+  return 0;
+}

20191128/higher-math-4.c

+#include <stdio.h>
+
+#define VIER 4;
+
+int main (void)
+{
+  printf ("Drei mal vier = %d.\n", 3 * VIER);
+  return 0;
+}

20191128/higher-math-5.c

+#include <stdio.h>
+
+#define VIER 2 + 2
+
+int main (void)
+{
+  printf ("Drei mal vier = %d.\n", 3 * VIER);
+  return 0;
+}

20191128/higher-math-6.c

+#include <stdio.h>
+
+#define VIER (2 + 2)
+
+int main (void)
+{
+  printf ("Drei mal vier = %d.\n", 3 * VIER);
+  return 0;
+}