1 #include<iostream>
2 using namespace std;
3 class BaseClass
4 {
5 public:
6 virtual void fn1();
7 void fn2 ();
8 };
9 void BaseClass::fn1()
10 {
11 //cout<<"调用基类的虚函数fn1()"<<endl;
12 }
13 void BaseClass::fn2()
14 {
15 cout<<"调用基类的虚函数fn2()"<<endl;
16 }
17 class DerivedClass:public BaseClass
18 {
19 public:
20 void fn1();
21 void fn2();
22 };
23 void DerivedClass::fn1()
24 {
25 cout<<"调用派生类的函数fn1()"<<endl;
26 }
27 void DerivedClass::fn2()
28 {
29 cout<<"调用派生类的函数fn2()"<<endl;
30 }
31 int main()
32 {
33 DerivedClass aDerivedClass;
34 DerivedClass*pDerivedClass=&aDerivedClass;
35 BaseClass*pBaseClass=&aDerivedClass;
36 pBaseClass->fn1();
37 pBaseClass->fn2();
38 pDerivedClass->fn1();
39 pDerivedClass->fn2();
40 }
