final可以用来修饰类和修饰类的虚函数final修饰类时final修饰的类就不能再被继承了，断绝了后代。classHuawei1{public: Huawei1(){};};classHuawei2final:publicHuawei1{public: Huawei2(){};};classHonor:publicHuawei2{public: Honor(){};};c