diff --git a/c-programming/reverse-ramdisk.c b/c-programming/reverse-ramdisk.c
index 5581800..da5a4d1 100644
--- a/c-programming/reverse-ramdisk.c
+++ b/c-programming/reverse-ramdisk.c
@@ -320,26 +320,29 @@ int tf_read(int ID, size_t offset, void* dest, size_t data_size) {
 int main(void) {
 	DBG_PRINT("started\n");
 
-	int ID_1 = tf_alloc(4, sizeof(int));
-	int ID_2 = tf_alloc(16, sizeof(uint16_t));
+#define ARRAY_1_LEN 4
+#define ARRAY_2_LEN 16
+
+	int ID_1 = tf_alloc(ARRAY_1_LEN, sizeof(int));
+	int ID_2 = tf_alloc(ARRAY_2_LEN, sizeof(uint16_t));
 	if (ID_1 == -1 || ID_2 == -1)
 		RETREAT("tf_alloc");
 	DBG_PRINT("allocated memory\n");
 
-	int test_data_1[4] = {123, 456, 789, -123};
+	int test_data_1[ARRAY_1_LEN] = {123, 456, 789, -123};
 	DBG_PRINT("initialized array 1\n");
 
-	uint16_t test_data_2[16];
-	for (size_t i = 0; i < 16; i++)
+	uint16_t test_data_2[ARRAY_2_LEN];
+	for (size_t i = 0; i < ARRAY_2_LEN; i++)
 		test_data_2[i] = 1 << i;
 	DBG_PRINT("initialized array 2\n");
 
-	for (size_t i = 0; i < 4; i++)
+	for (size_t i = 0; i < ARRAY_1_LEN; i++)
 		if (tf_write(ID_1, i * sizeof(int), &test_data_1[i], sizeof(int)) == -1)
 			RETREAT("tf_write");
 	DBG_PRINT("wrote array 1\n");
 
-	for (size_t i = 0; i < 16; i++)
+	for (size_t i = 0; i < ARRAY_2_LEN; i++)
 		if (tf_write(ID_2, i * sizeof(uint16_t), &test_data_2[i],
 			sizeof(uint16_t)) == -1)
 			RETREAT("tf_write");
@@ -356,23 +359,23 @@ int main(void) {
 		test_data_2[i] ^= 1;
 	DBG_PRINT("filled array 2 with garbage\n");
 
-	for (size_t i = 0; i < 4; i++)
+	for (size_t i = 0; i < ARRAY_1_LEN; i++)
 		if (tf_read(ID_1, i * sizeof(int), &test_data_1[i], sizeof(int)) == -1)
 			RETREAT("tf_read");
 	DBG_PRINT("restored array 1\n");
 
-	for (size_t i = 0; i < 16; i++)
+	for (size_t i = 0; i < ARRAY_2_LEN; i++)
 		if (tf_read(ID_2, i * sizeof(uint16_t), &test_data_2[i],
 			sizeof(uint16_t)) == -1)
 			RETREAT("tf_read");
 	DBG_PRINT("restored array 2\n");
 
 	DBG_PRINT("Values (1): ");
-	for (size_t i = 0; i < 4; i++)
-		DBG_PRINT("%d%c", test_data_1[i], i == 3 ? '\n' : ' ');
+	for (size_t i = 0; i < ARRAY_1_LEN; i++)
+		DBG_PRINT("%d%c", test_data_1[i], i == (ARRAY_1_LEN - 1) ? '\n' : ' ');
 	DBG_PRINT("Values (2): ");
-	for (size_t i = 0; i < 16; i++)
-		DBG_PRINT("%d%c", test_data_2[i], i == 15 ? '\n' : ' ');
+	for (size_t i = 0; i < ARRAY_2_LEN; i++)
+		DBG_PRINT("%d%c", test_data_2[i], i == (ARRAY_2_LEN - 1) ? '\n' : ' ');
 
 	tf_free(ID_1);
 	tf_free(ID_2);