update cv4

cv4/a_train.c

@@ -64,9 +64,10 @@ struct car* clear_train(struct car* first, const char* target)
     }
     if(first->next == NULL)
     {
-        if(strcmp(first->value, target))
+        if(!strcmp(target, first->value))
         {
             free(first);
+            //first = NULL;
             return NULL;
         }
         else

cv4/main.c

@@ -22,7 +22,7 @@ int main()
 
     printf("Zadajte stanicu, ktorá sa má vyradiť:\n");
     scanf("%s", buf);
-    clear_train(train,buf);
+    train = clear_train(train,buf);
 
     print_train(train);