1 #include <iostream> 2 using namespace std; 3  4 class A 5 { 6 public: 7     A()  8     {  9         cout << "A::A()" << endl; 10     }11     virtual ~A() 12     {13         cout << "A::~A()" << endl;14     }15     void fun1() const 16     {17         cout << "A::fun1()" << endl;18     }19     virtual void fun2() const20     {21         cout << "A::fun2()" << endl;22     }23 };24 25 class B : public A26 {27 public:28     B() 29     { 30         cout << "B::B()" << endl; 31     }32     ~B() 33     {34         cout << "B::~B()" << endl;35     }36     void fun1() const 37     {38         cout << "B::fun1()" << endl;39     }40     void fun2() const41     {42         cout << "B::fun2()" << endl;43     }44 };45 46 void Test1(const A * pA)47 {48     pA->fun1();49     pA->fun2();50     delete pA;51 }52 53 void Test2(const B * pB)54 {55     pB->fun1();56     pB->fun2();57     delete pB;58 }59 60 void main()61 {62     cout << "=====Test1====" << endl;63     Test1(new B());64     cout << "====Test2====" << endl;65     Test2(new B());66     system("pause");67 }68 69 // run out:70 /*71 =====Test1====72 A::A()73 B::B()74 A::fun1()75 B::fun2()76 B::~B()77 A::~A()78 ====Test2====79 A::A()80 B::B()81 B::fun1()82 B::fun2()83 B::~B()84 A::~A()85 请按任意键继续. . .86 */

 1 #include <iostream> 2 using namespace std; 3  4 void main() 5 { 6     for (int i = 10; --i >= 0; i = i>>1) 7     { 8         cout << (i + 1) << endl; 9     }10 11     system("pause");12 }13 14 // run out:15 /*16 1017 418 119 请按任意键继续. . .20 */