numbers.c fertig

makefile

@@ -35,8 +35,14 @@ $(program_obj_filesobj_files): %.o: %.c
 # --------------------------
 # Unit Tests
 # --------------------------
-unitTests:
+unitTests: stacktest
-	echo "needs to be implemented"
+
+
+test_stack: stacktest.o stack.o
+	$(CC) $(FLAGS) $^ -o stacktest
+
+test_stack.o:  stacktest.c
+	$(CC) -c $(FLAGS) $< -o $@
 
 # --------------------------
 # Clean

numbers.c

@@ -14,13 +14,69 @@
 // 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.
+
+int compare(const void* a, const void* b) {
+   return (*(unsigned int*)a - *(unsigned int*)b);
+}
+
 unsigned int *createNumbers(unsigned int len)
 {
+  //array erstellen
+  if(len < 2)
+    return NULL;
 
+  unsigned int *arr = malloc(sizeof(unsigned int)*len);
+
+  //sicherstellen dass zahlen einmalig vorkommen
+  srand(time(NULL));
+  for(int i = 0; i < len; i++){
+    while(1){  
+      unsigned int value = (rand() % (2 * len)) + 1;  
+      int alreadyUsed = 0;
+      for(int j = 0; j < i; j++) {
+        if(arr[j] == value) {
+          alreadyUsed = 1;      
+          break;              
+        }
+      }
+      if(!alreadyUsed) {
+        arr[i] = value;         
+        break;                   
+      }
+    }
+  }
+
+  //eine zahl duplizieren und irgendwo hinkopieren
+  int dupIndex = rand() % len;
+  int targetIndex;
+  do{
+    targetIndex = rand() % len;
+  }while (targetIndex == dupIndex);  
+  arr[targetIndex] = arr[dupIndex];
+
+  return arr;
 }
 
 // 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)
 {
+  if(len < 2){
+    return 0;
+  }
 
+  unsigned int *copy = malloc(sizeof(unsigned int)*len);
+
+  memcpy(copy, numbers, len * sizeof(unsigned int));
+
+  qsort(copy, len, sizeof(unsigned int), compare);
+
+  unsigned int duplicate = 0;
+  for(int i = 1; i < len; i++){
+    if(copy[i] == copy[i-1]){
+      duplicate = copy[i];
+      break;
+    }
+  }
+  free(copy);
+  return duplicate;
 }

stack.c

@@ -10,24 +10,43 @@
 // Pushes data as pointer onto the stack.
 StackNode *push(StackNode *stack, void *data)
 {
-
+    StackNode *newNode = (StackNode *)malloc(sizeof(StackNode));
+    if (newNode == NULL) {  
+        return NULL; 
+    }
+    newNode ->data = data;
+    newNode ->next = stack;
+    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) {
+        return NULL; 
+    }   
+    StackNode *next = stack->next;
+    free(stack);    
+    return next;
 }
 
 // Returns the data of the top element.
 void *top(StackNode *stack)
 {
-
+if(stack == NULL) {
+        return NULL; 
+    } 
+    return stack->data;
 }
 
 // Clears stack and releases all memory.
 void clearStack(StackNode *stack)
 {
-
+    StackNode *temp;
+    while(stack != NULL) {
+        temp = stack;
+        stack = stack->next;
+        free(temp);
+    }   
 }

stack.h

@@ -8,7 +8,12 @@ The latest element is taken from the stack. */
 #include <stdlib.h>
 
 //TODO: passenden Datentyp als struct anlegen
+typedef struct{
+void *data;
+struct StackNode *next;    
 
+
+}StackNode;
 // Pushes data as pointer onto the stack.
 StackNode *push(StackNode *stack, void *data);
 

stacktest.c

@@ -0,0 +1,58 @@
+#include <stdio.h>
+#include "stack.h"
+#include <stdlib.h>
+
+
+//Funktion, um nachzuprüfen, ob Test bestanden wurde
+void check(char *msg, int expected, int actual){
+    printf("%s: ", msg);
+    printf("Erwartet: %d, Tatsächlich: %d\n", expected, actual);
+    if(expected == actual){
+        printf("Test bestanden\n");
+    }else{
+        printf("Test nicht bestanden\n");
+    }
+
+}
+//Schnappt sich oberstes Element
+int getTop(StackNode *stack){
+    void *data = top(stack);
+   return(int)data;
+
+}
+
+//Tests der einzelnen Stackfunktionen
+int main(){
+    StackNode *stack = NULL;
+    //Test push
+
+    stack = push(stack, (void*)10);
+    check("Nach Push 10", 10, getTop(stack));
+
+    stack = push(stack, (void*)20);
+    check("Nach Push 20", 20, getTop(stack));
+
+    //pop testen
+    stack = pop(stack);
+    check("Nach Pop", 10, getTop(stack));
+
+    //clearStack testen
+    clearStack(stack);
+    stack = NULL;
+    check("Nach ClearStack", 0, getTop(stack));
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+    return 0;
+}