working

Reviewed-on: hallerni98888/info2Praktikum-DobleSpiel#1

.gitignore

@@ -0,0 +1,11 @@
+doble_initial.exe
+highscores.txt
+runStackTest.exe
+stack.o
+runNumbersTest.exe
+numbers.o
+.vscode/launch.json
+.vscode/settings.json
+*.o
+*.exe
+runBintreeTest

bintree.c

@@ -1,18 +1,48 @@
 #include <string.h>
+#include <stdio.h>
 #include "stack.h"
 #include "bintree.h"
 
-//TODO: binären Suchbaum implementieren
+static StackNode *stack;
+static TreeNode *tree = NULL;
+// TODO: binären Suchbaum implementieren
 /*  * `addToTree`: fügt ein neues Element in den Baum ein (rekursiv),
-    * `clearTree`: gibt den gesamten Baum frei (rekursiv),
-    * `treeSize`: zählt die Knoten im Baum (rekursiv),
-    * `nextTreeData`: Traversierung mit Hilfe des zuvor implementierten Stacks. */
+ * `clearTree`: gibt den gesamten Baum frei (rekursiv),
+ * `treeSize`: zählt die Knoten im Baum (rekursiv),
+ * `nextTreeData`: Traversierung mit Hilfe des zuvor implementierten Stacks. */
 
 // Adds a copy of data's pointer destination to the tree using compareFct for ordering. Accepts duplicates
 // if isDuplicate is NULL, otherwise ignores duplicates and sets isDuplicate to 1 (or to 0 if a new entry is added).
 TreeNode *addToTree(TreeNode *root, const void *data, size_t dataSize, CompareFctType compareFct, int *isDuplicate)
 {
+    if (root == NULL)
+    {
+        TreeNode *newNode = malloc(sizeof(TreeNode));
+        newNode->data = malloc(dataSize);
+        memcpy(newNode->data, data, dataSize);
+        newNode->left = NULL;
+        newNode->right = NULL;
+        return newNode;
+    }
+    
+    int cmp = compareFct(root->data, data);
+    if (cmp < 0)
+    {
+        root->left = addToTree(root->left, data, dataSize, compareFct, isDuplicate);
+    }
+    else if (cmp > 0)
+    {
+        root->right = addToTree(root->right, data, dataSize, compareFct, isDuplicate);
+    }
+    else
+    {
+        if (isDuplicate != NULL)
+        {
+            *isDuplicate = 1; // Mark as duplicate if needed.
+        }
+    }
 
+    return root;
 }
 
 // Iterates over the tree given by root. Follows the usage of strtok. If tree is NULL, the next entry of the last tree given is returned in ordering direction.
@@ -20,17 +50,62 @@ TreeNode *addToTree(TreeNode *root, const void *data, size_t dataSize, CompareFc
 // push the top node and push all its left nodes.
 void *nextTreeData(TreeNode *root)
 {
+    if (root != NULL)
+    {
+        clearStack(stack);
+        buildStack(root);
+    }
+
+    if(stack != NULL)
+    {
+        
+        void* data = top(stack);
+        stack = pop(stack);
+        return data;
+    }
+
+    return NULL;
 
 }
 
 // Releases all memory resources (including data copies).
 void clearTree(TreeNode *root)
 {
+    if (root == NULL)
+    {
+        return;
+    }
 
+    if (root->left != NULL)
+    {
+        clearTree(root->left);
+        free(root->left);
+        root->left = NULL;
+    }
+    if (root->right != NULL)
+    {
+        clearTree(root->right);
+        free(root->right);
+        root->right = NULL;
+    }
+    root = NULL;
 }
 
 // Returns the number of entries in the tree given by root.
 unsigned int treeSize(const TreeNode *root)
 {
+    return root == NULL ? 0 : treeSize(root->left) + treeSize(root->right) + 1;
+}
 
-}
+void buildStack(TreeNode *root)
+{
+    
+    if (root == NULL)
+    {
+       return; 
+    }
+        
+    buildStack(root->left);   // biggest first
+    stack = push(stack, root->data);                 // push
+    buildStack(root->right); 
+}

bintree.h

@@ -24,4 +24,6 @@ void clearTree(TreeNode *root);
 // Returns the number of entries in the tree given by root.
 unsigned int treeSize(const TreeNode *root);
 
+void buildStack(TreeNode *root);
+
 #endif

highscore.c

@@ -79,6 +79,8 @@ int addHighscore(const char *name, double timeInSeconds, unsigned int len)
 {
     HighscoreEntry entry = createHighscoreEntry(name, calculateScore(timeInSeconds, len));
     highscoreTree = addToTree(highscoreTree, &entry, sizeof(entry), compareHighscoreEntries, NULL);
+    //HighscoreEntry *temp = highscoreTree->data;
+    //printf("%s%d\n", temp->name, temp->score);
 
     return entry.score;
 }

highscores.txt

@@ -1 +1,5 @@
-player1;3999
+nick;9963
+nick;9946
+simon;4965
+alex;2996
+simon;2996

makefile

@@ -1,49 +1,61 @@
-CC = gcc
-FLAGS = -g -Wall -lm
-
-ifeq ($(OS),Windows_NT)
-	include makefile_windows.variables
-else
-	UNAME = $(shell uname)
-	ifeq ($(UNAME),Linux)
-		include makefile_linux.variables
-	else
-		include makefile_mac.variables
-	endif
-endif
-
-raylibfolder = ./raylib
-unityfolder = ./unity
-
-# --------------------------
-# Initiales Programm bauen (zum ausprobieren)
-# --------------------------
-doble_initial:
-	$(CC) -o doble_initial $(BINARIES)/libdoble_complete.a
-
-# --------------------------
-# Selbst implementiertes Programm bauen
-# --------------------------
-program_obj_files = stack.o bintree.o numbers.o timer.o highscore.o
-
-doble : main.o $(program_obj_files)
-	$(CC) $(FLAGS) $^ -o doble
-
-$(program_obj_filesobj_files): %.o: %.c
-	$(CC) -c $(FLAGS) $^ -o $@
-
-# --------------------------
-# Unit Tests
-# --------------------------
-unitTests:
-	echo "needs to be implemented"
-
-# --------------------------
-# Clean
-# --------------------------
-clean:
-ifeq ($(OS),Windows_NT)
-	del /f *.o doble
-else
-	rm -f *.o doble
+CC = gcc
+FLAGS = -g -Wall -lm
+
+ifeq ($(OS),Windows_NT)
+	include makefile_windows.variables
+else
+	UNAME = $(shell uname)
+	ifeq ($(UNAME),Linux)
+		include makefile_linux.variables
+	else
+		include makefile_mac.variables
+	endif
+endif
+
+raylibfolder = ./raylib
+unityfolder = ./unity
+
+# --------------------------
+# Initiales Programm bauen (zum ausprobieren)
+# --------------------------
+doble_initial:
+	$(CC) -o doble_initial $(BINARIES)/libdoble_complete.a
+
+# --------------------------
+# Selbst implementiertes Programm bauen
+# --------------------------
+program_obj_files = stack.o bintree.o numbers.o timer.o highscore.o
+
+doble : main.o $(program_obj_files)
+	$(CC) $(FLAGS) $^ -o doble
+
+$(program_obj_filesobj_files): %.o: %.c
+	$(CC) -c $(FLAGS) $^ -o $@
+
+# --------------------------
+# Unit Tests
+# --------------------------
+stackTests: stack.o test_stack.c $(unityfolder)/unity.c
+	$(CC) $(FLAGS) -I$(unityfolder) -o runStackTest test_stack.c stack.o $(unityfolder)/unity.c
+
+# --------------------------
+# numbers.c Tests
+# --------------------------
+numbersTests: numbers.o test_numbers.c $(unityfolder)/unity.c
+	$(CC) $(FLAGS) -I$(unityfolder) -o runNumbersTest test_numbers.c numbers.o $(unityfolder)/unity.c
+
+# --------------------------
+# bintree.c Tests
+# --------------------------
+bintreeTests: bintree.o test_bintree.c $(unityfolder)/unity.c
+	$(CC) $(FLAGS) -I$(unityfolder) -o runBintreeTest test_bintree.c bintree.o $(unityfolder)/unity.c
+
+# --------------------------
+# Clean
+# --------------------------
+clean:
+ifeq ($(OS),Windows_NT)
+	del /f *.o doble
+else
+	rm -f *.o doble
 endif

numbers.c

@@ -5,22 +5,166 @@
 #include "numbers.h"
 #include "bintree.h"
 
-//TODO: getDuplicate und createNumbers implementieren
+// TODO: getDuplicate und createNumbers implementieren
 /*  *   * Erzeugen eines Arrays mit der vom Nutzer eingegebenen Anzahl an Zufallszahlen.
-  * Sicherstellen, dass beim Befüllen keine Duplikate entstehen.
-  * Duplizieren eines zufälligen Eintrags im Array.
-  * in `getDuplicate()`: Sortieren des Arrays und Erkennen der doppelten Zahl durch Vergleich benachbarter Elemente. */
+ * Sicherstellen, dass beim Befüllen keine Duplikate entstehen.
+ * Duplizieren eines zufälligen Eintrags im Array.
+ * in `getDuplicate()`: Sortieren des Arrays und Erkennen der doppelten Zahl durch Vergleich benachbarter Elemente. */
 
 // Returns len random numbers between 1 and 2x len in random order which are all different, except for two entries.
 // Returns NULL on errors. Use your implementation of the binary search tree to check for possible duplicates while
 // creating random numbers.
+unsigned int checkArray(unsigned int *array, unsigned int len, unsigned int number)
+{
+  int free = 1;
+
+  for (int i = 0; i < len; i++)
+  {
+    if (array[i] == number)
+    {
+      free = 0;
+      break;
+      
+    }
+  }
+
+  return free;
+}
+
 unsigned int *createNumbers(unsigned int len)
 {
+  srand(time(NULL));
+  unsigned int *array = (unsigned int *)malloc(len * sizeof(unsigned int));
+  int randomNr, randomPos, filler;
+  
 
+  if (array == NULL)
+  {
+    return NULL; // Fehler
+  }
+
+  for (int i = 0; i < len; i++)
+  {
+    array[i] = 0;
+  }
+  
+  for (int i = 0; i < len; i++)
+  {
+    do
+    {
+      array[i] = (rand() % (2 * len))+ 1;
+    } while (!checkArray(array, i, array[i]));
+  }
+
+  randomPos = rand() % len;
+  randomNr = array[randomPos];
+
+  filler = randomPos;
+  while(filler == randomPos)
+  {
+    filler = rand() % len;
+  }
+  array[filler] = randomNr;
+  
+  return array;
+}
+
+void merge(unsigned int arr[], unsigned int left, unsigned int mid, unsigned int right)
+{
+  unsigned int i, j, k;
+  unsigned int n1 = mid - left + 1;
+  unsigned int n2 = right - mid;
+
+  // Create temporary arrays
+  unsigned int leftArr[n1], rightArr[n2];
+
+  // Copy data to temporary arrays
+  for (i = 0; i < n1; i++)
+    leftArr[i] = arr[left + i];
+  for (j = 0; j < n2; j++)
+    rightArr[j] = arr[mid + 1 + j];
+
+  // Merge the temporary arrays back into arr[left..right]
+  i = 0;
+  j = 0;
+  k = left;
+  while (i < n1 && j < n2)
+  {
+    if (leftArr[i] <= rightArr[j])
+    {
+      arr[k] = leftArr[i];
+      i++;
+    }
+    else
+    {
+      arr[k] = rightArr[j];
+      j++;
+    }
+    k++;
+  }
+
+  // Copy the remaining elements of leftArr[], if any
+  while (i < n1)
+  {
+    arr[k] = leftArr[i];
+    i++;
+    k++;
+  }
+
+  // Copy the remaining elements of rightArr[], if any
+  while (j < n2)
+  {
+    arr[k] = rightArr[j];
+    j++;
+    k++;
+  }
+}
+
+void mergeSort(unsigned int arr[], unsigned int left, unsigned int right)
+{
+  if (left < right)
+  {
+
+    // Calculate the midpoint
+    unsigned int mid = left + (right - left) / 2;
+
+    // Sort first and second halves
+    mergeSort(arr, left, mid);
+    mergeSort(arr, mid + 1, right);
+
+    // Merge the sorted halves
+    merge(arr, left, mid, right);
+  }
 }
 
 // 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)
 {
+  unsigned int temp[len];
+  unsigned int duplicate = 0;
 
+  /*if(numbers == NULL || (sizeof(numbers) / sizeof(typeof(numbers)) != len))
+  {
+    return 0;S
+  }*/
+
+  for (int i = 0; i < len; i++)
+  {
+    temp[i] = numbers[i];
+  }
+
+  // Sorting arr using mergesort
+  mergeSort(temp, 0, len - 1);
+
+  for (int i = 0; i < len - 1; i++)
+  {
+    duplicate = temp[i];
+    if (duplicate == temp[i + 1])
+    {
+
+      break;
+    }
+  }
+
+  return duplicate;
 }

stack.c

@@ -1,33 +1,53 @@
 #include <stdlib.h>
 #include "stack.h"
 
-//TODO: grundlegende Stackfunktionen implementieren:
+// TODO: grundlegende Stackfunktionen implementieren:
 /*  * `push`: legt ein Element oben auf den Stack,
-    * `pop`: entfernt das oberste Element,
-    * `top`: liefert das oberste Element zurück,
-    * `clearStack`: gibt den gesamten Speicher frei. */
+ * `pop`: entfernt das oberste Element,
+ * `top`: liefert das oberste Element zurück,
+ * `clearStack`: gibt den gesamten Speicher frei. */
 
 // Pushes data as pointer onto the stack.
 StackNode *push(StackNode *stack, void *data)
 {
-
+    StackNode *newNode = malloc(sizeof(StackNode));
+    newNode->data = data;
+    newNode->next = stack;  // Set the new node's next pointer to the current top of the stack.
+    return newNode;  // Return the new node as the top of the stack.
 }
 
 // Deletes the top element of the stack (latest added element) and releases its memory. (Pointer to data has to be
 // freed by caller.)
 StackNode *pop(StackNode *stack)
 {
+    if (stack == NULL)
+    {
+        return NULL;  // Nothing to pop if stack is empty.
+    }
 
+    StackNode *tempNode = stack;
+    stack = stack->next;  // Move the stack pointer to the next node.
+    free(tempNode);  // Free the old top node.
+
+    return stack;
 }
 
 // Returns the data of the top element.
 void *top(StackNode *stack)
 {
+    if (stack == NULL)
+    {
+        return NULL;  // Return NULL if stack is empty.
+    }
 
+    return stack->data;  // Return the value of the top node.
 }
 
 // Clears stack and releases all memory.
 void clearStack(StackNode *stack)
 {
-
+    while (stack != NULL)
+    {
+        stack = pop(stack);  // Pop each element and free memory.
+    }
 }

stack.h

@@ -1,25 +1,29 @@
-#ifndef STACK_H
-#define STACK_H
-
-/* A stack is a special type of queue which uses the LIFO (last in, first out) principle. 
-This means that with each new element all other elements are pushed deeper into the stack. 
-The latest element is taken from the stack. */
-
-#include <stdlib.h>
-
-//TODO: passenden Datentyp als struct anlegen
-
-// Pushes data as pointer onto the stack.
-StackNode *push(StackNode *stack, void *data);
-
-// Deletes the top element of the stack (latest added element) and releases its memory. (Pointer to data has to be
-// freed by caller.)
-StackNode *pop(StackNode *stack);
-
-// Returns the data of the top element.
-void *top(StackNode *stack);
-
-// Clears stack and releases all memory.
-void clearStack(StackNode *stack);
-
-#endif
+#ifndef STACK_H
+#define STACK_H
+
+/* A stack is a special type of queue which uses the LIFO (last in, first out) principle. 
+This means that with each new element all other elements are pushed deeper into the stack. 
+The latest element is taken from the stack. */
+
+#include <stdlib.h>
+
+//TODO: passenden Datentyp als struct anlegen
+typedef struct Node {
+    void *data;
+    struct Node* next;
+} StackNode;
+
+// Pushes data as pointer onto the stack.
+StackNode *push(StackNode *stack, void *data);
+
+// Deletes the top element of the stack (latest added element) and releases its memory. (Pointer to data has to be
+// freed by caller.)
+StackNode *pop(StackNode *stack);
+
+// Returns the data of the top element.
+void *top(StackNode *stack);
+
+// Clears stack and releases all memory.
+void clearStack(StackNode *stack);
+
+#endif

stackTest.c

@@ -0,0 +1,100 @@
+#include "unity.h"
+#include "stack.h"  // Stack-Header-Datei
+#include <stdlib.h>
+
+// Test Setup and Teardown Functions
+void setUp(void) {
+    // Setup code (falls notwendig, wie Initialisierungen)
+}
+
+void tearDown(void) {
+    // Cleanup code (falls notwendig)
+}
+
+// Test for push operation
+void test_push(void) {
+    StackNode *stack = NULL;
+    int data1 = 10, data2 = 20;
+
+    // Push elements to the stack
+    stack = push(stack, &data1);
+    stack = push(stack, &data2);
+
+    // Check if the stack is not empty
+    TEST_ASSERT_NOT_NULL(stack);
+
+    // Check if the top element is correct
+    int *topData = top(stack);
+    TEST_ASSERT_EQUAL_INT(20, *topData);  // The last pushed element should be on top
+}
+
+// Test for pop operation
+void test_pop(void) {
+    StackNode *stack = NULL;
+    int data1 = 10, data2 = 20;
+
+    // Push elements to the stack
+    stack = push(stack, &data1);
+    stack = push(stack, &data2);
+
+    // Pop the top element
+    stack = pop(stack);
+
+    // Check if the top element is now the first pushed element
+    int *topData = top(stack);
+    TEST_ASSERT_EQUAL_INT(10, *topData);  // After popping, the first element should be on top
+
+    // Pop the last element
+    stack = pop(stack);
+
+    // Check if the stack is empty now
+    TEST_ASSERT_NULL(stack);  // Stack should be NULL now
+}
+
+// Test for top operation
+void test_top(void) {
+    StackNode *stack = NULL;
+    int data1 = 10, data2 = 20;
+
+    // Push elements to the stack
+    stack = push(stack, &data1);
+    stack = push(stack, &data2);
+
+    // Check the top element
+    int *topData = top(stack);
+    TEST_ASSERT_EQUAL_INT(20, *topData);  // The top element should be 20 (last pushed)
+
+    // Pop the top element and check the new top
+    stack = pop(stack);
+    topData = top(stack);
+    TEST_ASSERT_EQUAL_INT(10, *topData);  // Now the top element should be 10
+}
+
+// Test for clearStack operation
+void test_clearStack(void) {
+    StackNode *stack = NULL;
+    int data1 = 10, data2 = 20;
+
+    // Push elements to the stack
+    stack = push(stack, &data1);
+    stack = push(stack, &data2);
+
+    // Clear the stack
+    clearStack(stack);
+
+    // The stack should be empty now
+    TEST_ASSERT_NULL(stack);  // Stack should be NULL
+}
+
+// Run all tests
+int main(void) {
+    UNITY_BEGIN();
+
+    // Run the individual test functions
+    RUN_TEST(test_push);
+    RUN_TEST(test_pop);
+    RUN_TEST(test_top);
+    RUN_TEST(test_clearStack);
+
+    return UNITY_END();
+}

test_bintree.c

@@ -0,0 +1,80 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "bintree.h"
+#include "unity.h"
+
+
+void sizeTest()
+{
+    TreeNode *root = (TreeNode *)malloc(sizeof(TreeNode));
+    TreeNode *node1 = (TreeNode *)malloc(sizeof(TreeNode));
+    TreeNode *node2 = (TreeNode *)malloc(sizeof(TreeNode));
+
+    int dataRoot = 2;
+    int dataNode1 = 1;
+    int dataNode2 = 3;
+
+    root->data = &dataRoot;
+    root->left = (TreeNode *)node1;
+    root->right = (TreeNode *)node2;
+
+    node1->data = &dataNode1;
+    node1->left = NULL;
+    node1->right = NULL;
+
+    node2->data = &dataNode2;
+    node2->left = NULL;
+    node2->right = NULL;
+
+    TEST_ASSERT_EQUAL_INT(3,treeSize(root));
+}
+
+void clearTest()
+{
+    TreeNode *root = (TreeNode *)malloc(sizeof(TreeNode));
+    TreeNode *node1 = (TreeNode *)malloc(sizeof(TreeNode));
+    TreeNode *node2 = (TreeNode *)malloc(sizeof(TreeNode));
+
+    int dataRoot = 2;
+    int dataNode1 = 1;
+    int dataNode2 = 3;
+
+    root->data = &dataRoot;
+    root->left = (TreeNode *)node1;
+    root->right = (TreeNode *)node2;
+
+    node1->data = &dataNode1;
+    node1->left = NULL;
+    node1->right = NULL;
+
+    node2->data = &dataNode2;
+    node2->left = NULL;
+    node2->right = NULL;
+
+    TreeNode *ptr = root;
+
+    clearTree(ptr);
+    TEST_ASSERT_EQUAL_INT(0,treeSize(root));
+}
+
+void setUp(void)
+{
+    // Falls notwendig, kann hier Vorbereitungsarbeit gemacht werden
+}
+
+void tearDown(void)
+{
+    // Hier kann Bereinigungsarbeit nach jedem Test durchgeführt werden
+}
+
+int main()
+{
+    UNITY_BEGIN();
+
+    printf("============================\nNumbers tests\n============================\n");
+
+    RUN_TEST(sizeTest);
+    RUN_TEST(clearTest);
+
+    return UNITY_END();
+}

test_numbers.c

@@ -0,0 +1,47 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "numbers.h"
+#include "unity.h"
+
+void createNumbersTest()
+{
+    unsigned int *array;
+    unsigned int len = 6;
+
+    array = createNumbers(len);
+    for (int i = 0; i < len; i++)
+    {
+        printf("%u ", array[i]);
+    }
+    printf("\n");
+    TEST_ASSERT_NOT_NULL(array);
+}
+
+void duplicateTest()
+{
+    unsigned int array[6] = {1, 4, 5, 2, 3, 1};
+    unsigned int len = 6;
+
+    TEST_ASSERT_EQUAL_INT(1, getDuplicate(array, len));
+}
+
+void setUp(void)
+{
+    // Falls notwendig, kann hier Vorbereitungsarbeit gemacht werden
+}
+
+void tearDown(void)
+{
+    // Hier kann Bereinigungsarbeit nach jedem Test durchgeführt werden
+}
+
+int main()
+{
+    UNITY_BEGIN();
+
+    printf("============================\nNumbers tests\n============================\n");
+    RUN_TEST(createNumbersTest);
+    RUN_TEST(duplicateTest);
+
+    return UNITY_END();
+}

test_stack.c

@@ -0,0 +1,197 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "stack.h"
+#include "unity.h"
+
+void test_push(void) {
+    StackNode *stack = NULL;
+    int data1 = 10, data2 = 20;
+
+    // Push elements to the stack
+    stack = push(stack, &data1);
+    stack = push(stack, &data2);
+
+    // Check if the stack is not empty
+    TEST_ASSERT_NOT_NULL(stack);
+
+    // Check if the top element is correct
+    int *topData = top(stack);
+    TEST_ASSERT_EQUAL_INT(20, *topData);  // The last pushed element should be on top
+}
+
+void test_push1(void)
+{
+    StackNode *testNode = NULL;
+    int data = 1;
+
+    // Test für leeren Stack
+    testNode = push(testNode, &data);
+    TEST_ASSERT_NOT_NULL(&testNode);
+    TEST_ASSERT_NULL(testNode->next);
+    int *temp = testNode->data;
+    TEST_ASSERT_EQUAL_INT(1, *temp);
+
+    data = 2;
+
+    // Test für nicht leeren Stack
+    testNode = push(testNode, &data);
+    TEST_ASSERT_NOT_NULL(&testNode);
+    TEST_ASSERT_NOT_NULL(testNode->next);
+    TEST_ASSERT_NULL(testNode->next->next);
+    temp = testNode->data;
+    TEST_ASSERT_EQUAL_INT(2, *temp);
+    testNode = testNode->next;
+    temp = testNode->data;
+    TEST_ASSERT_EQUAL_INT(1, *temp);
+}
+
+StackNode* setup(void *data, StackNode* next) {
+    StackNode* node = malloc(sizeof(StackNode)); // allocate memory on heap
+    if (node == NULL) {
+        perror("malloc failed");
+        exit(EXIT_FAILURE); // or handle the error differently
+    }
+    node->data = data;
+    node->next = next;
+    return node;
+}
+void test_pop(void) {
+    StackNode *stack = NULL;
+    int data1 = 10, data2 = 20;
+
+    // Push elements to the stack
+    stack = push(stack, &data1);
+    stack = push(stack, &data2);
+
+    // Pop the top element
+    stack = pop(stack);
+
+    // Check if the top element is now the first pushed element
+    int *topData = top(stack);
+    TEST_ASSERT_EQUAL_INT(10, *topData);  // After popping, the first element should be on top
+
+    // Pop the last element
+    stack = pop(stack);
+
+    // Check if the stack is empty now
+    TEST_ASSERT_NULL(stack);  // Stack should be NULL now
+}
+void test_pop2(void)
+{   
+    int x,y,z;
+    x = 1;
+    y = 2;
+    z = 3;
+    StackNode* node2 = setup(&z, NULL);
+    StackNode* node1 = setup(&y, node2);
+    StackNode* header = setup(&x, node1);
+    StackNode* temp;
+
+    temp = pop(header);
+    int after = 0;
+    while(temp) 
+    {
+        after++;
+        temp = temp->next;
+    }
+
+    
+    TEST_ASSERT_EQUAL_INT(2, after);
+    TEST_ASSERT_NULL(node1->next);
+}
+
+void test_top(void) {
+    StackNode *stack = NULL;
+    int data1 = 10, data2 = 20;
+
+    // Push elements to the stack
+    stack = push(stack, &data1);
+    stack = push(stack, &data2);
+
+    // Check the top element
+    int *topData = top(stack);
+    TEST_ASSERT_EQUAL_INT(20, *topData);  // The top element should be 20 (last pushed)
+
+    // Pop the top element and check the new top
+    stack = pop(stack);
+    topData = top(stack);
+    TEST_ASSERT_EQUAL_INT(10, *topData);  // Now the top element should be 10
+}
+
+void test_top2(void)
+{
+    int x,y,z;
+    x = 1;
+    y = 2;
+    z = 3;
+    StackNode* node2 = setup(&z, NULL);
+    StackNode* node1 = setup(&y, node2);
+    StackNode* header = setup(&x, node1);
+
+    int data = *(int *)top(header);
+    TEST_ASSERT_EQUAL_INT(node2->data, data);
+}
+
+void test_clearStack(void) {
+    StackNode *stack = NULL;
+    int data1 = 10, data2 = 20;
+
+    // Push elements to the stack
+    stack = push(stack, &data1);
+    stack = push(stack, &data2);
+
+    // Clear the stack
+    clearStack(stack);
+
+    // The stack should be empty now
+    TEST_ASSERT_NULL(stack);  // Stack should be NULL
+}
+
+void test_clear()
+{
+    int x,y,z;
+    x = 1;
+    y = 2;
+    z = 3;
+    StackNode* node2 = setup(&z, NULL);
+    StackNode* node1 = setup(&y, node2);
+    StackNode* header = setup(&x, node1);
+    StackNode* temp;
+    
+    clearStack(header);
+    temp = header;
+    
+    int after = 0;
+    while(temp) 
+    {
+        after++;
+        temp = temp->next;
+    }
+
+    
+    TEST_ASSERT_NULL(after);
+}
+
+void setUp(void)
+{
+    // Falls notwendig, kann hier Vorbereitungsarbeit gemacht werden
+}
+
+void tearDown(void)
+{
+    // Hier kann Bereinigungsarbeit nach jedem Test durchgeführt werden
+}
+
+int main()
+{
+    UNITY_BEGIN();
+
+    printf("============================\nStack tests\n============================\n");
+
+    RUN_TEST(test_push);
+    RUN_TEST(test_pop);
+    RUN_TEST(test_top);
+    RUN_TEST(test_clearStack);
+
+    return UNITY_END();
+}

unittest.h

@@ -0,0 +1,10 @@
+#ifndef UNITTTESTS_H
+#define UNITTTESTS_H
+
+#include <stdio.h>
+
+typedef int (*UnitTestType)(void);
+
+#define RUN_UNIT_TEST(fct) printf("%80s: %d\n", #fct, fct())
+
+#endif