new file mode 100644
--- /dev/null
+++ b/concatenation.c
@@ -0,0 +1,62 @@
+/*
+ *     $Id: concatenation.c,v 1.1.1.1 2008-04-28 17:32:53 mbroeker Exp $
+ * $Source: /development/c/demos/concatenation.c,v $
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct P {
+    char *lastname;
+    char *firstname;
+    char *street;
+    int postal;
+    char *location;
+};
+
+typedef struct P Person;
+
+#define insert(a) { person->a = a; }
+#define show(a) { printf("%9s:\t%s\n", #a, person.a); }
+#define show_int(a) { printf("%9s:\t%d\n", #a, person.a); }
+
+void print_Person (Person person)
+{
+    show (lastname);
+    show (firstname);
+    show (street);
+    show_int (postal);
+    show (location);
+    printf ("\n");
+}
+
+void set_Person (Person * person, char *lastname, char *firstname, char *street, int postal, char *location)
+{
+    /*
+     * inserts <name> into person-><name>
+     */
+    insert (lastname);
+    insert (firstname);
+    insert (street);
+    insert (postal);
+    insert (location);
+}
+
+int main (int argc, char **argv)
+{
+    Person person[5];
+    int i;
+
+    set_Person (&person[0], "Breitkopf", "Manuela", "Maxim-Gorki-Strasse 49", 18106, "Rostock");
+    set_Person (&person[1], "Bröker", "Markus", "Maxim-Gorki-Strasse 25", 18106, "Rostock");
+    set_Person (&person[2], "Fischer", "Tina", "Ehm-Welk Straße 11", 18106, "Rostock");
+    set_Person (&person[3], "Jopp", "Marika", "Bleicherstraße 12", 18155, "Rostock");
+    set_Person (&person[4], "Rennert", "Nicole", "Willi-Bredel-Strasse 20", 18106, "Rostock");
+
+    for (i = 0; i < 5; i++) {
+        print_Person (person[i]);
+    }
+
+    return EXIT_SUCCESS;
+}