C++课后习题 18. 教材习题8

• • 原题题目
  • 代码实现
  • 提交结果

#include 
using namespace std;

class BaseClass {
 public:
  virtual void fn1() const {
    cout << "BaseClass:fn1()" << endl;
  }

  void fn2() const {
    cout << "BaseClass:fn2()" << endl;
  }
};

class DerivedClass : public BaseClass {
 public:
  virtual void fn1() const override {
    cout << "DerivedClass:fn1()" << endl;
  }

  void fn2() const {
    cout << "DerivedClass:fn2()" << endl;
  }
};

int main() {
  DerivedClass dc;
  BaseClass *pb = &dc;
  DerivedClass *pd = &dc;

  pb->fn1();
  pb->fn2();
  pd->fn1();
  pd->fn2();
  return 0;
}