C++课后习题 16. 教材习题7

• • 原题题目
  • 代码实现
  • 提交结果

#include 

using namespace std;

class BaseClass {
 public:
  void fn1() const { cout << "BaseClass:fn1()" << endl; }
  void fn2() const { cout << "BaseClass:fn2()" << endl; }
};

class DerivedClass : public BaseClass {
 public:
  void fn1() const { cout << "DerivedClass:fn1()" << endl; }
  void fn2() const { cout << "DerivedClass:fn2()" << endl; }
};

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

  dc.fn1();
  dc.fn2();
  pb->fn1();
  pb->fn2();
  pd->fn1();
  pd->fn2();
}