本课内容目前为英文。
One contract, many types
A post, a game result and a like are different things, yet each can earn points. An interface lets you write code that works with anything that earns points, and inheritance lets one type build on another.
本课内容目前为英文。
A post, a game result and a like are different things, yet each can earn points. An interface lets you write code that works with anything that earns points, and inheritance lets one type build on another.