//设计日期类，该类能够存储与处理年月日等信息。设计人员类包括string类型的姓名，data类型的出生日期，还包括性别，联系方式和住址等信息。再由人员类派生车学生类和教师类，学生类包括专业，学号，成绩等信息，教师类包括专业，担任课程和技术职称等信息。
#include<iostream.h>
class data{
private:
    int year;
    int day;
    int month;
public:
    data(int r=0,int d=0,int h=0)
    {
        year=r;
        day=d;
        month=h;
    }
    void show1()const
    {
        cout<<year<<day<<month<<endl;
    }
};
class people{
private:
    char name[40];
    int phonenum;
    char adress[50];
public:
    data(char *m=" ",int p,int *a=" ")
    {
        strcpy[name,m];
        strcpy[adress,a];
        phonenum=p;
    }
    void show2()const
    {
        cout<<name<<adress<<phonenum<<endl;
    }
};
class student{
private:
    char Professional[20];
    char xue[20];
    int score;
public:
    student(char *pro=" ",char *x,int s=0,int r=0,int d=0,int h=0,char *m=" ",int p,int *a=" "):student_data(r,d,h),student_people(m,p,a)
    {
        strcpy[Professional,pro];
        strcpy[xue,x];
        score=s;
    }
    void show3()const
    {
        cout<<Professional<<xue<<score<<endl;
        student_data.show1();
        student_people.show2();
    }
};
class teacher{
private:
    char course[20];
    char zhicheng[20];
public:
    teacher(char *c=" ",char *z=" ",int r=0,int d=0,int h=0,char *m=" ",int p,int *a=" "):teacher_data(r,d,h),teacher_people(m,p,a)
    {
        strcpy[course,c];
        strcpy[zhicheng,z];
    }
    void show4()const
    {
        cout<<course<<zhicheng<<endl;
        teacher_data.show1();
        teacher_people.show2();
}};
    void main()
    {
        student my_student("级","级",23,1989,2,43,"级",23,"级");
        my_student.show3();
        teacher my_teacher("的","第三位",23,34,23,"级",234,"几")；
        my_teacher.show4();
    }

没差吧