1/*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16declare function print(arg:any):string;
17
18class Animal {
19   age : number
20
21   constructor(a : number) {
22      this.age = a
23   }
24}
25
26class Dog extends Animal {
27    disp() {
28        super.age = 1;
29        print(super.age);
30   }
31}
32
33var a = new Animal(1);
34var wang = new Dog(3);
35wang.disp()
36