3. #include <iostream. h class person dpublic: Person(i cout<<"Constructor of person"<<endl; y persono cout<< Destructor of Person"<<endl; j class student public person &public: Studento( cout<<Constructor of Student"<<end; 3 Studentof cout<<Destructor of Student "<<endl; 3 class Teacher public Person dpublic: 运行结果为: Teachero( cout<< Constructor Constructor of Person TeacherOi cout<<" Destructor: Constructor of Student void maino Constructor of Person i Student s; Constructor of Teacher Teacher t: Destructor of Teacher Destructor of person Destructor of student C+程序设计课件设计制作 Destructor of personC++程序设计课件 设计制作：徐龙琴 6 3． #include <iostream.h> class Person {public: Person() { cout<<"Constructor of Person"<<endl; } ~Person() { cout<<"Destructor of Person"<<endl; } }; class Student : public Person { public: Student() { cout<<"Constructor of Student"<<endl; } ~Student() { cout<<"Destructor of Student"<<endl; } }; class Teacher : public Person {public: Teacher() { cout<<"Constructor of Teacher"<<endl; } ~Teacher() { cout<<"Destructor of Teacher"<<endl; } }; void main() { Student s; Teacher t; } 运行结果为： Constructor of Person Constructor of Student Constructor of Person Constructor of Teacher Destructor of Teacher Destructor of Person Destructor of Student Destructor of Person