摘要: 直接上代码 #include <iostream> #include <map> class Base { public: virtual void hello() const = 0; }; class A : public Base { public: A() { std::cout << "A 阅读全文
posted @ 2023-02-22 10:54 爱弹钢琴的卡农 阅读(42) 评论(0) 推荐(0)