南京航空航天大学：《程序设计》课程教学课件（PPT讲稿，二）Chapter 5-继承多态和虚函数

classBaseDemopublic:BaseDemo)cout<<"InBaseDemoconstructor.In"；~BaseDemoO){cout<<"InBaseDemo destructor.In";class DerivedDemo:public BaseDemopublic:DerivedDemo()cout<<"InDerivedDemo constructor.In";~DerivedDemo){ cout<<"In DerivedDemo destructor.In";

class BaseDemo { public: BaseDemo( ) { cout << "In BaseDemo constructor.\n"; } ~BaseDemo( ) { cout << "In BaseDemo destructor.\n"; } }; class DerivedDemo : public BaseDemo { public: DerivedDemo( ) { cout << "In DerivedDemo constructor.\n"; } ~ DerivedDemo( ) { cout << "In DerivedDemo destructor.\n"; } };

voidmain(cout<<下面定义一个DerivedDemo类对象In"；DerivedDemoobject;cout<<"下面将要结束程序\n"；5-3.cpp

void main( ) { cout << "下面定义一个DerivedDemo 类对象 \n" ; DerivedDemo object ; cout << "下面将要结束程序\n" ; } 5-3.cpp