C++报错多，类的组合相关概念不太懂。

Question

题目要求：
设计职员类，它继承了Person类并组合了Date类。编写主程序显示职员数据如下：
姓名：杨萍
出生日期：1988.10.6
性别：女
工作总站：团委
职务：团委书记
工资：6000

#include<iostream>
using namespace std;
class Person{
    public:
        string name;
        char sex;
        string zz;
        string zw;
        int wages;
        Person(string n, char s, string z1,string w1, int w){
            name=n;
            sex=s;
            zz=z1;
            zw=w1;
            wages=w;
        }
};
class Date{
    public:
        int year;
        int month;
        int day;
        Date(int y, int m, int d){
            year=y;
            month=m;
            day=d;
        }
};
class Worker:public Person{
    public:
        Date b(2000,6,6);
        Worker(string n, char s, string z, string w2, int w)：Person(n,s,z,w2,w){
            ;}
        void display( ){
            cout<<"姓名："<<name<<endl;
            cout<<"出生日期："<<b.year<<"."<<b.month<<"."<<b.day<<endl;
            cout<<"性别："<<sex<<endl;
            cout<<"工作总站："<<zz<<endl;
            cout<<"职务："<<zw<<endl;
            cout<<"工资："<<wages<<endl;
        }
};
int main( ){
    Worker aa("杨萍","女","团委","团委书记",6000);
    aa.display( );
    return 0;
    
}

报错多，对类的组合不太理解，帮我看一看

Answer 1

 
#include<iostream>
#include<string>
using namespace std;
class Person{
    public:
        string name;
        string sex;
        string zz;
        string zw;
        int wages;
        Person(string n, string s, string z1,string w1, int w){
            name=n;
            sex=s;
            zz=z1;
            zw=w1;
            wages=w;
        }
        ~Person(){}
};
class Date{
    public:
        int year;
        int month;
        int day;
        Date(){year=0;
            month=0;
            day=0;}
        Date(int y, int m, int d){
            year=y;
            month=m;
            day=d;
        }
};
class Worker:public Person{
    public:
        Date b;
    public:
        Worker(string n, string s, string z, string w2, int w)
            :Person(n,s,z,w2,w)
        {

            
        }
        void display( ){
            cout<<"姓名："<<name<<endl;
            cout<<"出生日期："<<b.year<<"."<<b.month<<"."<<b.day<<endl;
            cout<<"性别："<<sex<<endl;
            cout<<"工作总站："<<zz<<endl;
            cout<<"职务："<<zw<<endl;
            cout<<"工资："<<wages<<endl;
        }
};
int main( ){
    Worker aa(string("杨萍"),"女","团委","团委书记",6000);
    aa.b = Date(2000,6,6);
    aa.display( );
    return 0;
    
}