StackNode *push implementiert

stack.c

@@ -10,6 +10,15 @@
 // Pushes data as pointer onto the stack.
 StackNode *push(StackNode *stack, void *data)
 {
+    //Speicher reservieren
+    StackNode *newNode = malloc(sizeof(StackNode));
+    if (!newNode)
+        return stack;
+
+    newNode->data = data;
+    newNode->next = stack;
+
+    return newNode;
 
 }