diff --git a/20231102/Makefile b/20231102/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..7ae33df99f68fcf460324cfbb008f3f7a3863638
--- /dev/null
+++ b/20231102/Makefile
@@ -0,0 +1,8 @@
+%.elf: %.c
+ avr-gcc -Wall -Os -mmcu=atmega328p $< -o $@
+
+%.hex: %.elf
+ avr-objcopy -O ihex $< $@
+
+download:
+ ./download.sh
diff --git a/20231102/answer.c b/20231102/answer.c
new file mode 100644
index 0000000000000000000000000000000000000000..65a1dc248becb3157f2a226fc7b30df2ffb82e00
--- /dev/null
+++ b/20231102/answer.c
@@ -0,0 +1,6 @@
+#include "answer.h"
+
+int answer (void)
+{
+ return 23;
+}
diff --git a/20231102/answer.h b/20231102/answer.h
new file mode 100644
index 0000000000000000000000000000000000000000..b6777e8210983d315b3ac3424a61bd9c9f0437b1
--- /dev/null
+++ b/20231102/answer.h
@@ -0,0 +1 @@
+extern int answer (void);
diff --git a/20231102/bc-01.txt b/20231102/bc-01.txt
new file mode 100644
index 0000000000000000000000000000000000000000..95ddcc5ac1fa4c2897a355e76e48292fadb46b29
--- /dev/null
+++ b/20231102/bc-01.txt
@@ -0,0 +1,19 @@
+cassini/home/peter/bo/2023ws/hp/20231102> bc
+bc 1.07.1
+Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006, 2008, 2012-2017 Free Software Foundation, Inc.
+This is free software with ABSOLUTELY NO WARRANTY.
+For details type `warranty'.
+obase=13
+6 * 9
+42
+obase=A
+6 * 9
+54
+obase=13
+6 * 9
+42
+obase=1+1+1+1+1+1+1+1+1+1
+6 * 9
+54
+
+cassini/home/peter/bo/2023ws/hp/20231102>
diff --git a/20231102/bc-02.txt b/20231102/bc-02.txt
new file mode 100644
index 0000000000000000000000000000000000000000..8d284a3fecea7f5da860653b20f1ed258e191a86
--- /dev/null
+++ b/20231102/bc-02.txt
@@ -0,0 +1,24 @@
+cassini/home/peter/bo/2023ws/hp/20231102> bc
+bc 1.07.1
+Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006, 2008, 2012-2017 Free Software Foundation, Inc.
+This is free software with ABSOLUTELY NO WARRANTY.
+For details type `warranty'.
+obase=16
+42
+2A
+ibase=16
+B747 + A380
+15AC7
+obase=10
+5 + 5
+A
+A + A
+14
+18 + 18
+30
+ibase=1+1+1+1+1+1+1+1+1+1
+obase=10
+5 + 5
+10
+
+cassini/home/peter/bo/2023ws/hp/20231102>
diff --git a/20231102/bit-ops-01.c b/20231102/bit-ops-01.c
new file mode 100644
index 0000000000000000000000000000000000000000..c4c79cf505ef40976260a85b2618d7d2e283dd52
--- /dev/null
+++ b/20231102/bit-ops-01.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main (void)
+{
+ printf ("2 & 2 = %d\n", 2 & 2);
+ return 0;
+}
diff --git a/20231102/bit-ops-02.c b/20231102/bit-ops-02.c
new file mode 100644
index 0000000000000000000000000000000000000000..8c910ae16ba94684849cb02b95eb01229007f051
--- /dev/null
+++ b/20231102/bit-ops-02.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main (void)
+{
+ printf ("2^8 = %d\n", 2^8);
+ return 0;
+}
diff --git a/20231102/blink-0.c b/20231102/blink-0.c
new file mode 100644
index 0000000000000000000000000000000000000000..b0022c681fd1482ed0a6d9fded7bb0a54699de32
--- /dev/null
+++ b/20231102/blink-0.c
@@ -0,0 +1,9 @@
+#include <avr/io.h>
+
+int main (void)
+{
+ DDRD = 0x40; /* binär: 0100 0000 */
+ PORTD = 0x40; /* binär: 0100 0000 */
+ while (1);
+ return 0;
+}
diff --git a/20231102/blink-0.hex b/20231102/blink-0.hex
new file mode 100644
index 0000000000000000000000000000000000000000..6a05b7db67b71fe56b83474cab2ab278834e3777
--- /dev/null
+++ b/20231102/blink-0.hex
@@ -0,0 +1,10 @@
+:100000000C9434000C943E000C943E000C943E0082
+:100010000C943E000C943E000C943E000C943E0068
+:100020000C943E000C943E000C943E000C943E0058
+:100030000C943E000C943E000C943E000C943E0048
+:100040000C943E000C943E000C943E000C943E0038
+:100050000C943E000C943E000C943E000C943E0028
+:100060000C943E000C943E0011241FBECFEFD8E04C
+:10007000DEBFCDBF0E9440000C9444000C940000F1
+:0C00800080E48AB98BB9FFCFF894FFCF61
+:00000001FF
diff --git a/20231102/download.sh b/20231102/download.sh
new file mode 100755
index 0000000000000000000000000000000000000000..770c3b5dca74ac09778be055c9d6f5adb0df293b
--- /dev/null
+++ b/20231102/download.sh
@@ -0,0 +1,3 @@
+port=$(ls -rt /dev/ttyACM* | tail -1)
+echo avrdude -P $port -c arduino -p m328p -U flash:w:$(ls -rt *.hex | tail -1)
+avrdude -P $port -c arduino -p m328p -U flash:w:$(ls -rt *.hex | tail -1) 2>/dev/null
diff --git a/20231102/gtk-01.c b/20231102/gtk-01.c
new file mode 100644
index 0000000000000000000000000000000000000000..2cd0d601dee2293fdc361126ca08d208d7cdc1b9
--- /dev/null
+++ b/20231102/gtk-01.c
@@ -0,0 +1,17 @@
+#include <gtk/gtk.h>
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.gtk-01", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231102/gtk-01.txt b/20231102/gtk-01.txt
new file mode 100644
index 0000000000000000000000000000000000000000..4b085004cd6889e4ef264a94f3f75a898b506b64
--- /dev/null
+++ b/20231102/gtk-01.txt
@@ -0,0 +1,52 @@
+cassini/home/peter/bo/2023ws/hp/20231102> gcc -Wall -O gtk-01.c -o gtk-01
+gtk-01.c:1:10: fatal error: gtk/gtk.h: Datei oder Verzeichnis nicht gefunden
+ 1 | #include <gtk/gtk.h>
+ | ^~~~~~~~~~~
+compilation terminated.
+cassini/home/peter/bo/2023ws/hp/20231102> locate gtk/gtk.h
+/usr/include/gtk-2.0/gtk/gtk.h
+/usr/include/gtk-3.0/gtk/gtk.h
+/usr/include/gtk-4.0/gtk/gtk.h
+cassini/home/peter/bo/2023ws/hp/20231102> gcc -Wall -I /usr/include/gtk-4.0 -O gtk-01.c -o gtk-01
+In file included from /usr/include/gtk-4.0/gtk/gtk.h:30,
+ from gtk-01.c:1:
+/usr/include/gtk-4.0/gtk/css/gtkcss.h:30:10: fatal error: glib.h: Datei oder Verzeichnis nicht gefunden
+ 30 | #include <glib.h>
+ | ^~~~~~~~
+compilation terminated.
+cassini/home/peter/bo/2023ws/hp/20231102> locate glib.h
+/home/peter/bo/2012ws/rtech/material/usbstick/fdos/source/command/command/suppl/msglib.h
+/usr/include/jpeglib.h
+/usr/include/dbus-1.0/dbus/dbus-glib.h
+/usr/include/glib-2.0/glib.h
+/usr/include/harfbuzz/hb-glib.h
+cassini/home/peter/bo/2023ws/hp/20231102> gcc -Wall -I /usr/include/gtk-4.0 -I /usr/include/glib-2.0 -O gtk-01.c -o gtk-01
+In file included from /usr/include/glib-2.0/glib/galloca.h:34,
+ from /usr/include/glib-2.0/glib.h:32,
+ from /usr/include/gtk-4.0/gtk/css/gtkcss.h:30,
+ from /usr/include/gtk-4.0/gtk/gtk.h:30,
+ from gtk-01.c:1:
+/usr/include/glib-2.0/glib/gtypes.h:34:10: fatal error: glibconfig.h: Datei oder Verzeichnis nicht gefunden
+ 34 | #include <glibconfig.h>
+ | ^~~~~~~~~~~~~~
+compilation terminated.
+cassini/home/peter/bo/2023ws/hp/20231102> pkg-config --cflags --libs gtk4
+-I/usr/include/gtk-4.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/fribidi -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/x86_64-linux-gnu -I/usr/include/graphene-1.0 -I/usr/lib/x86_64-linux-gnu/graphene-1.0/include -mfpmath=sse -msse -msse2 -pthread -lgtk-4 -lpangocairo-1.0 -lpango-1.0 -lharfbuzz -lgdk_pixbuf-2.0 -lcairo-gobject -lcairo -lgraphene-1.0 -lgio-2.0 -lgobject-2.0 -lglib-2.0
+cassini/home/peter/bo/2023ws/hp/20231102> gcc -Wall -O -I/usr/include/gtk-4.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/fribidi -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/x86_64-linux-gnu -I/usr/include/graphene-1.0 -I/usr/lib/x86_64-linux-gnu/graphene-1.0/include -mfpmath=sse -msse -msse2 -pthread -lgtk-4 -lpangocairo-1.0 -lpango-1.0 -lharfbuzz -lgdk_pixbuf-2.0 -lcairo-gobject -lcairo -lgraphene-1.0 -lgio-2.0 -lgobject-2.0 -lglib-2.0 gtk-01.c -o gtk-01
+/usr/bin/ld: /tmp/cc6S8nDW.o: in function `activate':
+gtk-01.c:(.text+0x7): undefined reference to `gtk_application_window_new'
+/usr/bin/ld: gtk-01.c:(.text+0xf): undefined reference to `gtk_window_get_type'
+/usr/bin/ld: gtk-01.c:(.text+0x1d): undefined reference to `g_type_check_instance_cast'
+/usr/bin/ld: gtk-01.c:(.text+0x2c): undefined reference to `gtk_window_set_title'
+/usr/bin/ld: gtk-01.c:(.text+0x37): undefined reference to `g_type_check_instance_cast'
+/usr/bin/ld: gtk-01.c:(.text+0x3f): undefined reference to `gtk_window_present'
+/usr/bin/ld: /tmp/cc6S8nDW.o: in function `main':
+gtk-01.c:(.text+0x60): undefined reference to `gtk_application_new'
+/usr/bin/ld: gtk-01.c:(.text+0x8a): undefined reference to `g_signal_connect_data'
+/usr/bin/ld: gtk-01.c:(.text+0x8f): undefined reference to `g_application_get_type'
+/usr/bin/ld: gtk-01.c:(.text+0x9a): undefined reference to `g_type_check_instance_cast'
+/usr/bin/ld: gtk-01.c:(.text+0xa7): undefined reference to `g_application_run'
+/usr/bin/ld: gtk-01.c:(.text+0xb1): undefined reference to `g_object_unref'
+collect2: error: ld returned 1 exit status
+cassini/home/peter/bo/2023ws/hp/20231102> gcc -Wall -O gtk-01.c -I/usr/include/gtk-4.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/fribidi -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/x86_64-linux-gnu -I/usr/include/graphene-1.0 -I/usr/lib/x86_64-linux-gnu/graphene-1.0/include -mfpmath=sse -msse -msse2 -pthread -lgtk-4 -lpangocairo-1.0 -lpango-1.0 -lharfbuzz -lgdk_pixbuf-2.0 -lcairo-gobject -lcairo -lgraphene-1.0 -lgio-2.0 -lgobject-2.0 -lglib-2.0 -o gtk-01
+cassini/home/peter/bo/2023ws/hp/20231102>
diff --git a/20231102/gtk-01a.c b/20231102/gtk-01a.c
new file mode 100644
index 0000000000000000000000000000000000000000..d703f0e77abe1537808ccfef816602727b4fc0b1
--- /dev/null
+++ b/20231102/gtk-01a.c
@@ -0,0 +1,10 @@
+#include <gtk/gtk.h>
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.gtk-01", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231102/gtk-01b.c b/20231102/gtk-01b.c
new file mode 100644
index 0000000000000000000000000000000000000000..92cc3d65ed0c53c367b23acefb2ed5395f294231
--- /dev/null
+++ b/20231102/gtk-01b.c
@@ -0,0 +1,19 @@
+#include <gtk/gtk.h>
+#include <stdio.h>
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ printf ("activate()\n");
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.gtk-01", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231102/gtk-01c.c b/20231102/gtk-01c.c
new file mode 100644
index 0000000000000000000000000000000000000000..51961e429b7af4545e409484dd06e4c6f8196783
--- /dev/null
+++ b/20231102/gtk-01c.c
@@ -0,0 +1,22 @@
+#include <gtk/gtk.h>
+#include <stdio.h>
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ printf ("activate()\n");
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.gtk-01", G_APPLICATION_DEFAULT_FLAGS);
+ printf ("vor g_signal_connect()\n");
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ printf ("vor g_application_run()\n");
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ printf ("nach g_application_run()\n");
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231102/gtk-02.c b/20231102/gtk-02.c
new file mode 100644
index 0000000000000000000000000000000000000000..1ab3c19ea31e2c4a7960937bb97509bb0ad9ecdd
--- /dev/null
+++ b/20231102/gtk-02.c
@@ -0,0 +1,27 @@
+#include <gtk/gtk.h>
+#include <stdio.h>
+
+static void hello (GtkWidget *this, gpointer user_data)
+{
+ char *world = user_data;
+ printf ("Hello, %s!\n", world);
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+ GtkWidget *button = gtk_button_new_with_label ("Hello, world!");
+ g_signal_connect (button, "clicked", G_CALLBACK (hello), "world");
+ gtk_window_set_child (GTK_WINDOW (window), button);
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.gtk-02", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231102/gtk-03.c b/20231102/gtk-03.c
new file mode 100644
index 0000000000000000000000000000000000000000..4fe3a030783bc3075bae4a85705085d0e36b8d5c
--- /dev/null
+++ b/20231102/gtk-03.c
@@ -0,0 +1,26 @@
+#include <gtk/gtk.h>
+
+static void close_window (GtkWidget *this, gpointer user_data)
+{
+ GtkWindow *window = user_data;
+ gtk_window_destroy (window);
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+ GtkWidget *button = gtk_button_new_with_label ("Quit");
+ g_signal_connect (button, "clicked", G_CALLBACK (close_window), window);
+ gtk_window_set_child (GTK_WINDOW (window), button);
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231102/gtk-04.c b/20231102/gtk-04.c
new file mode 100644
index 0000000000000000000000000000000000000000..6ae0e7dca8ad959bcf22fb275d6a78a5f39c00f5
--- /dev/null
+++ b/20231102/gtk-04.c
@@ -0,0 +1,20 @@
+#include <gtk/gtk.h>
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+ GtkWidget *button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_window_set_child (GTK_WINDOW (window), button);
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231102/gtk-05.c b/20231102/gtk-05.c
new file mode 100644
index 0000000000000000000000000000000000000000..a7394ee1faf9c92fe04a7ca5e95b79a63d9c3b66
--- /dev/null
+++ b/20231102/gtk-05.c
@@ -0,0 +1,35 @@
+#include <gtk/gtk.h>
+
+static void hello (GtkWidget *this, gpointer user_data)
+{
+ char *world = user_data;
+ printf ("Hello, %s!\n", world);
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *hello_button = gtk_button_new_with_label ("Hello, world!");
+ g_signal_connect (hello_button, "clicked", G_CALLBACK (hello), "world");
+ gtk_box_append (GTK_BOX (vbox), hello_button);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231102/gtk-06.c b/20231102/gtk-06.c
new file mode 100644
index 0000000000000000000000000000000000000000..64687de0440a694d1f644de4f2a180a37987ff84
--- /dev/null
+++ b/20231102/gtk-06.c
@@ -0,0 +1,53 @@
+#include <gtk/gtk.h>
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ GdkRGBA red = { 1.0, 0.0, 0.0, 0.8 };
+ GdkRGBA yellow = { 1.0, 1.0, 0.0, 0.6 };
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 0.4 };
+
+ gdk_cairo_set_source_rgba (c, &red);
+ cairo_rectangle (c, 10, 10, 60, 40);
+ cairo_fill (c);
+
+ gdk_cairo_set_source_rgba (c, &yellow);
+ cairo_arc (c, 65, 50, 30, 0, 2 * G_PI);
+ cairo_fill (c);
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_move_to (c, 10, 70);
+ cairo_line_to (c, 70, 70);
+ cairo_line_to (c, 40, 18);
+ cairo_close_path (c);
+ cairo_fill (c);
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, 100, 100);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231102/gtk-06a.c b/20231102/gtk-06a.c
new file mode 100644
index 0000000000000000000000000000000000000000..46e02a52785486fc64d2261cb4889cface90b3ac
--- /dev/null
+++ b/20231102/gtk-06a.c
@@ -0,0 +1,55 @@
+#include <gtk/gtk.h>
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+ int width, int height, gpointer user_data)
+{
+ printf ("draw()\n");
+
+ GdkRGBA red = { 1.0, 0.0, 0.0, 0.8 };
+ GdkRGBA yellow = { 1.0, 1.0, 0.0, 0.6 };
+ GdkRGBA blue = { 0.0, 0.5, 1.0, 0.4 };
+
+ gdk_cairo_set_source_rgba (c, &red);
+ cairo_rectangle (c, 10, 10, 60, 40);
+ cairo_fill (c);
+
+ gdk_cairo_set_source_rgba (c, &yellow);
+ cairo_arc (c, 65, 50, 30, 0, 2 * G_PI);
+ cairo_fill (c);
+
+ gdk_cairo_set_source_rgba (c, &blue);
+ cairo_move_to (c, 10, 70);
+ cairo_line_to (c, 70, 70);
+ cairo_line_to (c, 40, 18);
+ cairo_close_path (c);
+ cairo_fill (c);
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+ GtkWidget *window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+ GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+ gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+ GtkWidget *drawing_area = gtk_drawing_area_new ();
+ gtk_widget_set_size_request (drawing_area, 100, 100);
+ gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+ gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+ GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+ g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+ gtk_box_append (GTK_BOX (vbox), quit_button);
+
+ gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+ GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+ g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+ int status = g_application_run (G_APPLICATION (app), argc, argv);
+ g_object_unref (app);
+ return status;
+}
diff --git a/20231102/hp-20231102.txt b/20231102/hp-20231102.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7b7825a69284a0876614da66326020db0e82846a
--- /dev/null
+++ b/20231102/hp-20231102.txt
@@ -0,0 +1,35 @@
+"Output"
+~~~~~~~~
+AND
+ 10101100 A
+ & 11111011 Bit gezielt löschen & B "Maske"
+ -------- ---
+ 10101000 A, außer dort, wo B Nullen hat
+ Dort sind es Nullen.
+OR
+ 10101100 A
+ | 00000010 Bit gezielt setzen & B "Maske"
+ -------- ---
+ 10101110 A, außer dort, wo B Einsen hat
+ Dort sind es Einsen.
+XOR
+ 10101100 A
+ ^ 00000010 Bit gezielt umklappen & B "Maske"
+ -------- ---
+ 10101110 A, außer dort, wo B Einsen hat
+ Dort wird A umgeklappt.
+ 00000010
+ ^ 00001000
+ --------
+ 00001010
+
+"Input"
+~~~~~~~
+AND
+ 10101100
+ & 00000100
+ --------
+ 00000100 <-- ungleich 0: Bit war gesetzt
+
+ Achtung: Das Ergebnis ist nicht gleich 1!
+ (sondern: gleich 4)
diff --git a/20231102/inttypes-01.c b/20231102/inttypes-01.c
new file mode 100644
index 0000000000000000000000000000000000000000..199cc8c7fde8362918a296a1dba592e1f9b48b11
--- /dev/null
+++ b/20231102/inttypes-01.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+#include <stdint.h>
+
+int main (void)
+{
+ uint64_t a = 2^14;
+ printf ("a = %d\n", a);
+ return 0;
+}
diff --git a/20231102/inttypes-02.c b/20231102/inttypes-02.c
new file mode 100644
index 0000000000000000000000000000000000000000..db5f57ac4a2bf412a48344b229acacc25634af6d
--- /dev/null
+++ b/20231102/inttypes-02.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+#include <stdint.h>
+
+int main (void)
+{
+ uint64_t a = 2^14;
+ printf ("a = %ld\n", a);
+ return 0;
+}
diff --git a/20231102/inttypes-03.c b/20231102/inttypes-03.c
new file mode 100644
index 0000000000000000000000000000000000000000..75106270555681b2a3edd428f3a995fd279e7286
--- /dev/null
+++ b/20231102/inttypes-03.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <inttypes.h>
+
+int main (void)
+{
+ uint64_t a = 2^14;
+ printf ("a = %" PRIu64 "\n", a);
+ return 0;
+}
diff --git a/20231102/libraries-01.txt b/20231102/libraries-01.txt
new file mode 100644
index 0000000000000000000000000000000000000000..a62d99c83018145522912641729418ab20a5802b
--- /dev/null
+++ b/20231102/libraries-01.txt
@@ -0,0 +1,10 @@
+cassini/home/peter/bo/2023ws/hp/20231102> ar rs libanswer.a answer.o
+ar: creating libanswer.a
+cassini/home/peter/bo/2023ws/hp/20231102> ls -l libanswer.a
+-rw-r--r-- 1 peter peter 1232 2. Nov 14:45 libanswer.a
+cassini/home/peter/bo/2023ws/hp/20231102> gcc -Wall -O philosophy.c -lanswer -o philosophy /usr/bin/ld: cannot find -lanswer: Datei oder Verzeichnis nicht gefunden
+collect2: error: ld returned 1 exit status
+cassini/home/peter/bo/2023ws/hp/20231102> gcc -L . -Wall -O philosophy.c -lanswer -o philosophy
+cassini/home/peter/bo/2023ws/hp/20231102> ./philosophy
+The answer is 23.
+cassini/home/peter/bo/2023ws/hp/20231102>
diff --git a/20231102/number-systems-01.c b/20231102/number-systems-01.c
new file mode 100644
index 0000000000000000000000000000000000000000..791b2f4b6cfc9c6157d465fba5c61bd0b3bc53ea
--- /dev/null
+++ b/20231102/number-systems-01.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+
+int main (void)
+{
+ int number[] = { 01, 02, 03, 04, 05, 06, 07, 08, 09, 10 }; // Achtung: Oktalzahlen!
+ for (int i = 0; i < 10; i++)
+ printf ("%d\n", number[i]);
+ return 0;
+}
diff --git a/20231102/number-systems-02.c b/20231102/number-systems-02.c
new file mode 100644
index 0000000000000000000000000000000000000000..958ef95972c64d316bf04129b7e43b4e95b334ef
--- /dev/null
+++ b/20231102/number-systems-02.c
@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+int main (void)
+{
+ int number[] = { 023, 025, 027, // Achtung: Oktalzahlen!
+ 033, 035, 037,
+ 123, 125, 127,
+ 133, 135, 137 };
+ for (int i = 0; i < 12; i++)
+ printf ("%d\n", number[i]);
+ return 0;
+}
diff --git a/20231102/philosophy.c b/20231102/philosophy.c
new file mode 100644
index 0000000000000000000000000000000000000000..e9f508a501d9ec66d02e0636a9f6c71f2c7a8594
--- /dev/null
+++ b/20231102/philosophy.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+#include "answer.h"
+
+int main (void)
+{
+ printf ("The answer is %d.\n", answer ());
+ return 0;
+}