Fixing the link issue

du4/a_train.c

@@ -65,9 +65,8 @@ struct car* clear_train(struct car* first, const char* target) {
     struct car* next = first->next;
     while (next->next)
     {if(strcmp(next->value, target) == 0){
-        
-        temp->next = next->next;
         next->next = NULL;
+        temp->next = next->next;
         free(next);
 
     }