diff --git a/doble.exe b/doble.exe
index 8454e4e..d6d4dfc 100644
Binary files a/doble.exe and b/doble.exe differ
diff --git a/makefile b/makefile
index f1e0b91..38b7a8e 100644
--- a/makefile
+++ b/makefile
@@ -38,6 +38,9 @@ $(program_obj_filesobj_files): %.o: %.c
 unitTests: numbers.o test_numbers.c bintree.o $(unityfolder)/unity.c
 	$(CC) $(FLAGS) -I$(unityfolder) -o runtest_numbers test_numbers.c numbers.o bintree.o $(unityfolder)/unity.c
 
+unitTestsStack: stack.o test_stack.c $(unityfolder)/unity.c
+	$(CC) $(FLAGS) -I$(unityfolder) $^ -o $@
+
 # --------------------------
 # Clean
 # --------------------------
diff --git a/numbers.c b/numbers.c
index 5fbd091..2468ad8 100644
--- a/numbers.c
+++ b/numbers.c
@@ -50,8 +50,8 @@ unsigned int *createNumbers(unsigned int len)
 int compare(const void *a, const void *b) {
     return (*(int*)a - *(int*)b);
 }
-//mit Binärbaum
 
+//mit Binärbaum
 /*
 unsigned int *createNumbers(unsigned int len)
 {
@@ -84,6 +84,8 @@ unsigned int *createNumbers(unsigned int len)
   free(numbers);
 }
 */
+
+
 // Returns only the only number in numbers which is present twice. Returns zero on errors.
 unsigned int getDuplicate(const unsigned int numbers[], unsigned int len)
 {
diff --git a/numbers.o b/numbers.o
index 371b158..a1401c1 100644
Binary files a/numbers.o and b/numbers.o differ