diff --git a/a4.3/tauschen.c b/a4.3/tauschen.c
new file mode 100644
index 0000000..4f9c402
--- /dev/null
+++ b/a4.3/tauschen.c
@@ -0,0 +1,31 @@
+#include <stdio.h>
+
+void tausche_intPtr(int** a, int** b) {
+	int* tmp = *a;
+	*a = *b;
+	*b = tmp;
+}
+
+void tausche_int(int* a, int* b) {
+	int tmp = *a;
+	*a = *b;
+	*b = tmp;
+}
+
+int main(void) {
+	int i = 1;
+	int j = 2;
+
+	printf("i = %d, j = %d\n", i, j);
+	tausche_int(&i, &j);
+	printf("i = %d, j = %d\n", i, j);
+
+	int* a = &i;
+	int* b = &j;
+
+	printf("*a = %d, *b = %d\n", *a, *b);
+	tausche_intPtr(&a, &b);
+	printf("*a = %d, *b = %d\n", *a, *b);
+
+	return 0;
+}
\ No newline at end of file
diff --git a/a4.4/array.c b/a4.4/array.c
new file mode 100644
index 0000000..254a4d2
--- /dev/null
+++ b/a4.4/array.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+int main(void) {
+	int a[] = { 1, 5, 19, -4, 3 };
+	int* p;
+	int i;
+	p = a;
+	for (i=1; i<5; i++) {
+		if (a[i] > *p) {
+			p = &a[i];
+		}
+	}
+	printf("Maximum: %d\n", *p );
+	return 0;
+}
\ No newline at end of file