final changes completed

.vscode/tasks.json

@@ -0,0 +1,28 @@
+{
+    "tasks": [
+        {
+            "type": "cppbuild",
+            "label": "C/C++: gcc.exe build active file",
+            "command": "C:\\ProgramData\\mingw64\\mingw64\\bin\\gcc.exe",
+            "args": [
+                "-fdiagnostics-color=always",
+                "-g",
+                "${file}",
+                "-o",
+                "${fileDirname}\\${fileBasenameNoExtension}.exe"
+            ],
+            "options": {
+                "cwd": "${fileDirname}"
+            },
+            "problemMatcher": [
+                "$gcc"
+            ],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "detail": "Task generated by Debugger."
+        }
+    ],
+    "version": "2.0.0"
+}

bintree.c

@@ -1,36 +1,125 @@
+#include <stdlib.h>          
+#include <stdio.h>           
 #include <string.h>          
+
 #include "stack.h"           
 #include "bintree.h"         
 
-//TODO: binären Suchbaum implementieren
+static StackNode *push_left(TreeNode *node, StackNode *stack);  
-/*  * `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. */
 
-// Adds a copy of data's pointer destination to the tree using compareFct for ordering. Accepts duplicates
+// Vergleichsfunktion 
-// if isDuplicate is NULL, otherwise ignores duplicates and sets isDuplicate to 1 (or to 0 if a new entry is added).
+int compareFct(const void *argument1, const void *argument2)
+{
+    int x = *((int *)argument1);                   
+    int y = *((int *)argument2);                   
+
+    if (x < y) return -1;                          
+    if (x > y) return 1;                           
+    return 0;                                      
+}
+
+// Erzeugt einen neuen Baumknoten mit Datenkopie 
+static TreeNode *create_node(const void *data, size_t data_size)
+{
+    TreeNode *node = malloc(sizeof(TreeNode));    // Speicher für neuen Knoten reservieren
+    if (!node)
+    {
+        perror("Speicher wurde NICHT reserviert!"); 
+        return NULL;                               
+    }
+
+    node->data = malloc(data_size);               // Speicher für Knotendaten reservieren
+    if (!node->data)
+    {
+        perror("Speicher wurde NICHT reserviert!"); 
+        free(node);                                
+        return NULL;                               
+    }
+
+    memcpy(node->data, data, data_size);          // Daten in neuen Speicher kopieren
+    node->left = NULL;                             // Linken Kindzeiger initialisieren
+    node->right = NULL;                            // Rechten Kindzeiger initialisieren
+
+    return node;                                   // Zeiger auf neuen Knoten zurückgeben
+}
+
+//Fügt Daten in den Binärbaum ein 
 TreeNode *addToTree(TreeNode *root, const void *data, size_t dataSize, CompareFctType compareFct, int *isDuplicate)
 {
+    if (root == NULL)                              // Wenn Baum leer ist (Ende erreicht)
+    {
+        if (isDuplicate)
+            *isDuplicate = 0;                      // Kein Duplikat, da neu eingefügt
+        return create_node(data, dataSize);       
+    }
 
+    int cmp = compareFct(data, root->data);       // Daten mit aktuellem Knoten vergleichen
+
+    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)
+            *isDuplicate = 1;                     
+    }
+
+    return root;                                  // Wurzel unverändert zurückgeben 
 }
 
-// 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.
+// Inorder-Iterator über den Baum 
-// Use your implementation of a stack to organize the iterator. Push the root node and all left nodes first. On returning the next element,
-// push the top node and push all its left nodes.
 void *nextTreeData(TreeNode *root)
 {
+    static StackNode *stack = NULL;               
 
+    /* Linken Pfad auf Stack legen */
+    if (root != NULL)
+        stack = push_left(root, stack);           // Linken Pfad ab root auf Stack legen
+
+    if (stack == NULL)                            
+        return NULL;
+
+    TreeNode *node = (TreeNode *)top(stack);     // Oberstes Element vom Stack holen
+    stack = pop(stack);                           
+
+    if (node->right != NULL)                      // Wenn rechter Teilbaum existiert
+        stack = push_left(node->right, stack);   // Linken Pfad vom rechten Kind auf Stack legen
+
+    return node->data;                            // Daten des Knotens zurückgeben
 }
 
-// Releases all memory resources (including data copies).
+// Hilfsfunktion: linken Pfad auf Stack legen 
+static StackNode *push_left(TreeNode *node, StackNode *stack)
+{
+    while (node != NULL)                          // Solange linkes Kind existiert
+    {
+        stack = push(stack, node);                // Knoten auf Stack legen
+        node = node->left;                         
+    }
+    return stack;                                 
+}
+
+// Gibt gesamten Baum frei 
 void clearTree(TreeNode *root)
 {
+    if (root == NULL)                             
+        return;
 
+    clearTree(root->left);                        
+    clearTree(root->right);                       
+    free(root->data);                             
+    free(root);                                   
 }
-
+// Liefert Anzahl der Knoten 
-// Returns the number of entries in the tree given by root.
 unsigned int treeSize(const TreeNode *root)
 {
+    if (root == NULL)                             
+        return 0;
 
+    return 1 + treeSize(root->left) + treeSize(root->right); 
 }

highscores.txt

@@ -1 +1,10 @@
+thilo;19753
+thilo;14880
+max;14849
+thilo;14733
+player1;9956
+player2;4988
+player1;4980
+player_name;4980
+player2;4885
 player1;3999

makefile

@@ -35,15 +35,42 @@ $(program_obj_filesobj_files): %.o: %.c
 # --------------------------
 # Unit Tests
 # --------------------------
-unitTests:
+stack_test_sources = test_stack.c stack.c 
-	echo "needs to be implemented"
+stack_test_objects = $(stack_test_sources:.c=.o)
+
+numbers_test_sources = test_numbers.c numbers.c
+numbers_test_objects = $(numbers_test_sources:.c=.o)
+
+bintree_test_sources = test_bintree.c bintree.c
+bintree_test_objects = $(bintree_test_sources:.c=.o)
+
+stack_test_runner: $(stack_test_objects)
+	$(CC) $(FLAGS) $^ -o $@
+
+numbers_test_runner: $(numbers_test_objects)
+	$(CC) $(FLAGS) $^ -o $@
+
+bintree_test_runner: $(bintree_test_objects)
+	$(CC) $(FLAGS) $^ -o $@
+
+unitTests: stack_test_runner numbers_test_runner bintree_test_runner
+	@echo "============================="
+	@echo "Running Unit Tests..."
+	@echo "============================="
+	./stack_test_runner
+	./numbers_test_runner
+	./bintree_test_runner
+	@echo "============================="
+	@echo "Unit Tests Finished."
+	@echo "============================="
+
 
 # --------------------------
 # Clean
 # --------------------------
 clean:
 ifeq ($(OS),Windows_NT)
-	del /f *.o doble
+	del /f *.o doble test_runner
 else
-	rm -f *.o doble
+	rm -f *.o doble test_runner
 endif

numbers.c

@@ -6,21 +6,146 @@
 #include "bintree.h"
 
 //TODO: getDuplicate und createNumbers implementieren
-/*  *   * Erzeugen eines Arrays mit der vom Nutzer eingegebenen Anzahl an Zufallszahlen.
+/* * * * Sicherstellen, dass beim Befüllen keine Duplikate entstehen.
-  * Sicherstellen, dass beim Befüllen keine Duplikate entstehen.
+    * Duplizieren eines zufälligen Eintrags im Array.
-  * Duplizieren eines zufälligen Eintrags im Array.
+    * in `getDuplicate()`: Sortieren des Arrays und Erkennen der doppelten Zahl durch Vergleich benachbarter Elemente. */
-  * 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.
+static int compareFct(const void *argument1, const void *argument2)
+{
+    unsigned int x = *(const unsigned int *)argument1;
+    unsigned int y = *(const unsigned int *)argument2;
+
+    if (x < y) return -1;
+    if (x > y) return 1;
+    return 0;
+}
+
+static void fillArray(unsigned int *array, unsigned int len)
+{
+    TreeNode *root = NULL;
+    int isDuplicate;
+    unsigned int value;
+    unsigned int i = 0;
+
+    srand(time(NULL));
+
+    while (i < len)
+    {
+        value = rand() % (2 * len) + 1;
+
+        root = addToTree(root, &value, sizeof(unsigned int), compareFct, &isDuplicate);
+
+        if (isDuplicate == 0)
+        {
+            array[i] = value;
+            i++;
+        }
+        // Bei Duplikat: nochmal versuchen, kein Inkrement
+    }
+
+    clearTree(root);
+}
+
+
 unsigned int *createNumbers(unsigned int len)
 {
+	if (len < 2)
+	{
+		fprintf(stderr,"Fehler! Die Anzahl an Zahlen muss mindestens 2 sein!\n");
+		return NULL;
+	}
 	
+	unsigned int *array = malloc(sizeof(unsigned int) * len);
+
+	if (array == NULL)
+	{
+		fprintf(stderr,"Fehler! Der Speicher für das Array konnte nicht reserviert werden!\n");
+		return NULL;
+	}
+	
+	unsigned int position;
+	unsigned int duplicate_value;
+	unsigned int pos_dup;
+	
+
+	srand(time(NULL));
+
+	/*for (unsigned int i = 0; i < len; i++) 
+	{
+		array[i] = rand() % (2*len) + 1;
+	}
+	
+	*/
+
+	TreeNode *root = NULL;
+    int isDuplicate;
+    unsigned int value;
+    unsigned int i = 0;
+
+    srand(time(NULL));
+
+    while (i < len)
+    {
+        value = rand() % (2 * len) + 1;
+
+        root = addToTree(root, &value, sizeof(unsigned int), compareFct, &isDuplicate);
+
+        if (isDuplicate == 0)
+        {
+            array[i] = value;
+            i++;
+        }
+        // Bei Duplikat: nochmal versuchen, kein Inkrement
+    }
+
+    clearTree(root);
+
+	
+
+	position = rand() % len;
+	duplicate_value = array[position];
+
+	do
+	{
+		pos_dup = rand() % len;
+	} while (pos_dup == position);
+	
+	array[pos_dup] = array[position];
+	
+	return array; 
 }
 
 // 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 duplicate = 0;
 
+	if (numbers == NULL)
+	{
+		fprintf(stderr, "Fehler! Das übergebene Array ist leer!\n");
+		return duplicate;
+	}
+
+	if (len < 2)
+	{
+		fprintf(stderr,"Fehler! Die Anzahl an Zahlen muss mindestens 2 sein!\n");
+		return duplicate;
+	}
+	
+	for (unsigned int i = 0; i < len - 1; i++)
+	{
+		for (unsigned int k = i + 1; k < len; k++)
+		{
+			if (numbers[i] == numbers[k])
+			{
+				duplicate = numbers[k];
+				return duplicate;
+			}
+		}
+	}
+
+	return duplicate;
 }

stack.c

@@ -1,4 +1,5 @@
 #include <stdlib.h>
+#include <stdio.h>
 #include "stack.h"
 
 //TODO: grundlegende Stackfunktionen implementieren:
@@ -10,24 +11,72 @@
 // Pushes data as pointer onto the stack.
 StackNode *push(StackNode *stack, void *data)
 {
+    StackNode *newNode = (StackNode *)malloc(sizeof(StackNode));
     
+    if(newNode == NULL)
+    {
+        fprintf(stderr,"Fehler! Der Speicher für den neuen StackNode konnte nicht allokiert werden!\n");
+        return stack;
+    }
+    
+    newNode->data = data;   //saves data in newNode
+    newNode->next = stack;  //pushes the newNode on top of stack (newNode->next points to previous Top-Node)
+
+    return newNode;
 }
 
 // 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)
+    {
+        fprintf(stderr,"Fehler! Stack darf zum poppen nicht leer sein!\n");
+        return stack;
+    }
     
+    StackNode *old = stack;  //temporary pointer to old top of stack
+
+    stack= stack->next;  //update stack pointer to point to next element
+
+    free(old);  //free the memory of the old StackNode (old->data is not beeing freed)
+    
+    return stack;
 }
 
 // Returns the data of the top element.
 void *top(StackNode *stack)
 {
+    if (stack == NULL)
+    {
+        fprintf(stderr,"Fehler! Kann von einem leeren Stack nicht das oberste Element lesen!\n");
+        return NULL;
+    }
+    void *data = stack->data;
 
+    return data;
 }
 
 // Clears stack and releases all memory.
 void clearStack(StackNode *stack)
 {
+    StackNode *current = stack;
+    StackNode *next;
 
+    while (current != NULL)
+    {
+        next = current->next;
+
+        if (current->data != NULL) 
+        {
+            free(current->data);
+            current->data = NULL;
+        }
+
+        free(current);
+        current = NULL;
+        
+        current = next;
+    }
 }
+

stack.h

@@ -8,6 +8,12 @@ The latest element is taken from the stack. */
 #include <stdlib.h>
 
 //TODO: passenden Datentyp als struct anlegen
+typedef struct StackNode
+{
+    void *data;
+    struct StackNode *next;
+} StackNode;
+
 
 // Pushes data as pointer onto the stack.
 StackNode *push(StackNode *stack, void *data);

test_bintree.c

@@ -0,0 +1,103 @@
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "bintree.h"
+
+// Vergleichsfunktion für den Binärbaum (nur für Tests) 
+static int testCompareFct(const void *argument1, const void *argument2)
+{
+    unsigned int x = *(const unsigned int *)argument1;
+    unsigned int y = *(const unsigned int *)argument2;
+
+    if (x > y) return 1;
+    if (x < y) return -1;
+    return 0;
+}
+
+// Unit-Test für die Vergleichsfunktion 
+void test_compareFct(void)
+{
+    unsigned int a = 3, b = 5, c = 3;
+
+    assert(testCompareFct(&a, &b) < 0);
+    assert(testCompareFct(&b, &a) > 0);
+    assert(testCompareFct(&a, &c) == 0);
+}
+
+// Test für Einfügen und Baumgröße 
+void test_addToTree_and_treeSize(void)
+{
+    TreeNode *root = NULL;
+    int isDuplicate;
+
+    int values[] = {5, 3, 7, 2, 4, 6, 8};
+    int n = sizeof(values) / sizeof(values[0]);
+
+    for (int i = 0; i < n; i++)
+    {
+        root = addToTree(root, &values[i], sizeof(int),
+                         testCompareFct, &isDuplicate);
+        assert(isDuplicate == 0);
+    }
+
+    assert(treeSize(root) == 7);
+
+    clearTree(root);
+}
+
+// Test für Duplikaterkennung 
+void test_duplicates(void)
+{
+    TreeNode *root = NULL;
+    int isDuplicate;
+
+    int value = 5;
+
+    root = addToTree(root, &value, sizeof(int),
+                     testCompareFct, &isDuplicate);
+    assert(isDuplicate == 0);
+
+    root = addToTree(root, &value, sizeof(int),
+                     testCompareFct, &isDuplicate);
+    assert(isDuplicate == 1);
+
+    clearTree(root);
+}
+
+// Test für Inorder-Traversierung 
+void test_nextTreeData(void)
+{
+    TreeNode *root = NULL;
+    int isDuplicate;
+
+    int values[]   = {5, 3, 7, 2, 4, 6, 8};
+    int expected[] = {2, 3, 4, 5, 6, 7, 8};
+
+    for (int i = 0; i < 7; i++)
+    {
+        root = addToTree(root, &values[i], sizeof(int),
+                         testCompareFct, &isDuplicate);
+    }
+
+    for (int i = 0; i < 7; i++)
+    {
+        int *data = (int *)nextTreeData(root);
+        assert(data != NULL);
+        assert(*data == expected[i]);
+    }
+
+    assert(nextTreeData(NULL) == NULL);
+
+    clearTree(root);
+}
+
+int main(void)
+{
+    test_compareFct();
+    test_addToTree_and_treeSize();
+    test_duplicates();
+    test_nextTreeData();
+
+    printf("Alle Unit-Tests erfolgreich bestanden.\n");
+    return 0;
+}

test_numbers.c

@@ -0,0 +1,72 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "numbers.h"
+
+void test_empty_function(void)
+{
+    unsigned int len1 = 1;
+    unsigned int len2 = 5;
+    unsigned int *null_array = NULL;
+    unsigned int array[] = {1, 2, 3, 4, 5};
+    unsigned int *array_ptr = array;
+
+    unsigned int *create_num = createNumbers(len1);
+    if (create_num == NULL)
+        printf("Test on invalid lenght of array: SUCCESS!\n");
+
+    else 
+    {
+        printf("Test on invalid lenght of array: FAILED! Expected: NULL, Was: %p\n", create_num);
+        free(create_num);
+    }
+    
+    unsigned int duplicate = getDuplicate(null_array, len2);
+
+    if (duplicate == 0)
+        printf("Test on invalid array: SUCESS!\n");
+
+    else 
+        printf("Test on invalid array: FAILED! Expected: 0, WAS: %u\n", duplicate);
+
+    unsigned int duplicate2 = getDuplicate(array_ptr, len1);
+
+    if (duplicate2 == 0)
+        printf("Test on invalid lenght of array: SUCESS!\n");
+    
+    else 
+        printf("Test on invalid lenght of array: FAILED, Expected: 0, WAS: %u\n", duplicate2);
+}
+
+void test_array(void)
+{
+    unsigned int len = 10;
+    unsigned int *array = NULL;
+    
+    array = createNumbers(len);
+
+    if (array == NULL)
+        printf("Test on valid lenght of array: FAILED! Expected array greater than 0, Was: NULL\n");
+
+    else printf("Test on valid lenght of array: SUCESS!\n");
+
+    unsigned int test_array_dup[] = {1, 2, 3, 4, 5, 2, 6, 7, 8, 9};
+    unsigned int test_len = 10;
+    unsigned int duplicate = 2;
+
+    unsigned int duplicate_found = getDuplicate(test_array_dup, test_len);
+    
+    if (duplicate_found != duplicate)
+        printf("Test on valid lenght of array: FAILED! Expected %u, Was: %u\n", duplicate, duplicate_found);
+
+    else printf("Test on valid lenght of array: SUCESS!, Duplicate value: %d\n", duplicate);
+
+    free(array);
+}
+
+int main(void)
+{
+    test_empty_function();
+    printf("\n");
+    test_array();
+    return EXIT_SUCCESS;
+}

test_stack.c

@@ -0,0 +1,142 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "stack.h"
+
+void test_on_empty_stack(void)
+{
+    char *status_a = "leer";
+    char *status_b = "leer";
+    StackNode *stack = NULL;
+
+    StackNode *a = pop(stack);
+    void* b = top(stack);
+
+
+    if (a == NULL)
+    {
+        status_a = "PASSED";
+    }
+    else status_a = "FAILED";
+    
+    if (b == NULL)
+    {
+        status_b = "PASSED";
+    }
+    else status_b = "FAILED";
+
+    printf("Test on empty stack in pop: %s - Expected: NULL, Was: %p\n",status_a, (void*)a);
+    printf("Test on empty stack in top: %s - Expected: NULL, Was: %p\n",status_b, b);
+
+}
+
+void test_push(void)
+{
+    int a[3] = {0};
+    StackNode *stack = NULL;
+
+    for (int i = 1; i < 4; i++)
+    {
+        int *var_push = malloc(sizeof(int));
+
+        if (var_push == NULL) 
+        {
+            printf("Error in allocating memory in test_push!\n");
+            exit(EXIT_FAILURE);
+        }
+
+        *var_push = i;
+        stack = push(stack, var_push);
+
+        void *top_data = top(stack);
+        if (top_data != NULL && *(int*)top_data == i) {
+            a[i-1] = 1; 
+        } else {
+            a[i-1] = 0; 
+        }
+    }
+    
+    if (a[0] == 1 && a[1] == 1 && a[2] == 1)
+    {
+        printf("Test push: SUCCEESS!\n");
+    }
+    
+    else printf("Test pus: FAILED - Expected: all 1, Was: %d, %d, %d\n", a[0], a[1], a[2]);
+
+    clearStack(stack);
+}
+
+void test_pop(void)
+{
+    StackNode *stack = NULL;
+    int *var_push = malloc(sizeof(int));
+
+    if (var_push == NULL) 
+    {
+        fprintf(stderr, "Error in allocating memory in test_pop! Exiting.\n");
+        exit(EXIT_FAILURE);
+    }
+
+    *var_push = 1;
+    stack = push(stack, var_push);
+    stack = pop(stack);
+
+    if (stack == NULL) printf("Test pop: SUCCESS!\n");
+
+    else printf("Test pop: FAIL! - Stack is not empty! Head: %p\n", (void*)stack);
+
+    clearStack(stack);
+}
+
+void test_top(void)
+{
+    StackNode *stack = NULL;
+    int *var_push = malloc(sizeof(int));
+    *var_push = 1;
+    stack = push(stack, var_push);
+    void *b = top(stack);
+
+    if (b != 0 && *(int*)b == 1) printf("Test top: SUCCESS!\n");
+
+    else printf("Test top: FAIL! - Expected 1, was %p\n", b);
+
+    clearStack(stack);
+}
+
+void test_clearStack(void)
+{
+    StackNode *stack = NULL;
+
+    for (int i = 1; i < 4; i++)
+    {
+        int *var_push = malloc(sizeof(int));
+
+        if (var_push == NULL) 
+        {
+            fprintf(stderr, "Error in allocating memory in test_clearStack! Exiting.\n");
+            exit(EXIT_FAILURE); 
+        }
+
+        *var_push = i;
+        stack = push(stack, var_push);
+    }
+
+    clearStack(stack);
+    
+    void *a = top(stack);
+    if (a == NULL) printf("Test clear: SUCESS!\n");
+
+    else printf("Test clear: FAILED! - Expected: NULL, Was: %p\n", a);
+}
+
+int main()
+{
+    printf("============================\nStack Tests\n============================\n");
+
+    test_on_empty_stack();
+    test_push();
+    test_pop();
+    test_top();
+    test_clearStack();
+
+    return EXIT_SUCCESS;
+}