定义一个人员CPerson类，包含数据成员年龄和姓名，定义一个CPerson类的派生类教师CTeacher类，包含数据成员专业和职称。分别为两个类定义带参数的构造函数初始化，再分别定义display（）函数输出信息。将display()函数定义为虚函数，并用CPerson类的指针分别指向CPerson类和CTeacher类的对象，实现多态。编写主函数测试。 【输入形式】（第1行为提示文字）： Input age name major title: 35 liming english professor 【输出形式】 Age:35 Name:liming Major:english Title:professor 【其他样例形式】 如果年龄小于26岁，则提示"Input Error!"并结束程序。 如下： Input age name major title: Input Error!

下面是代码实现：

#include<iostream>
#include<string>
using namespace std;

class CPerson{
protected:
    int age;
    string name;
public:
    CPerson(int a, string n):age(a), name(n){}
    virtual void display(){
        cout<<"Age:"<<age<<"\nName:"<<name<<endl;
    }
};

class CTeacher:public CPerson{
private:
    string major;
    string title;
public:
    CTeacher(int a, string n, string m, string t):CPerson(a, n), major(m), title(t){}
    void display(){
        cout<<"Age:"<<age<<"\nName:"<<name<<"\nMajor:"<<major<<"\nTitle:"<<title<<endl;
    }
};

int main(){
    int age;
    string name, major, title;
    cin>>age>>name>>major>>title;
    if(age<26){
        cout<<"Input Error!"<<endl;
        return 0;
    }
    CPerson* person = new CPerson(age, name);
    CTeacher* teacher = new CTeacher(age, name, major, title);
    person->display();
    teacher->display();
    delete person;
    delete teacher;
    return 0;
}

输入样例：

35 liming english professor

输出样例：

Age:35
Name:liming
Age:35
Name:liming
Major:english
Title:professor