15%

cv5/a_train.c

@@ -17,7 +17,7 @@ struct car* add_car(struct car* first,const char* target) {
     struct car* this=first;
     int length=0;
     if(this==NULL){
-        return NULL;
+        return newcar;
     }
     else(this->!=NULL){
             this=this->next;