zly return

cv4/a_train.c

@@ -61,5 +61,12 @@ struct car* clear_train(struct car* first, const char* target) {
 			this = this->next;
 		}
 	} 
-	return first;
+	if(strcmp(this->value, target) ==0){
+		free(this);
+		this->next = NULL;
+		return this;
+	}
+	else{
+		return first;
+	}
 }