怎么用C++定义一个教师类

建立一个名为Teacher的类，该类有以下几个私有数据成员：工龄，姓名，职务。还有公有成员函数：带参构造函数Teacher(int wa,char *n,char *duty)、不带参构造函数Teacher（）、改变数据成员值函数 void SetValue(int wa,char *n,char *duty）、获取数据成员函数int GetWorkAge(),char *GetName()和char *GetDuty()。在main函数中定义一个对象并初始化，然后输出对象的信息。

#include<bits/stdc++.h>
using namespace std;
class Teacher
{
    private:
        int workage;
        string name;
       string zw;
    public:
      Teacher(int wa,string n,string duty) : workage(wa),name(n),zw(duty) {}
      Teacher() {}
      void SetValue(int wa,string n,string duty) {workage = wa;name = n;zw =duty;}
      int GetWorkAge() {return workage;}
      string GetName() {return name;}
      string GetDuty() {return zw;}
};
int main()
{
    Teacher teacher(10,"zhangsan","xiaozhang");
    cout<<teacher.GetWorkAge()<<teacher.GetName()<<teacher.GetDuty()<<endl;
    return 0;
}

代码如下：

#include <iostream>
#include <string>
using namespace std;
class Teacher
{
private:
    int mWa;
    char* mName;
    char* mZw;
public:
    Teacher(int wa,char* n,char* duty)
    {
        mWa = wa;
        mName = new char[strlen(n)+1];
        memcpy(mName,n,strlen(n));
        mName[strlen(n)] = 0;

        mZw = new char[strlen(duty)+1];
        memcpy(mZw,duty,strlen(duty));
        mZw[strlen(duty)] = 0;
    }
    Teacher()
    {
        mWa = 0;
        mName = 0;
        mZw = 0;
    }
    ~Teacher()
    {
        if(mName) delete[] mName;
        mName = 0;
        if(mZw) delete[] mZw;
        mZw = 0;
    }
    void SetValue(int wa,char* n,char* duty)
    {
        mWa = wa;

        if(mName) delete[] mName;
        mName = new char[strlen(n)+1];
        memcpy(mName,n,strlen(n));
        mName[strlen(n)] = 0;

        if(mZw) delete[] mZw;
        mZw = new char[strlen(duty)+1];
        memcpy(mZw,duty,strlen(duty));
        mZw[strlen(duty)] = 0;
    }
    int GetWorkAge(){return mWa;}
    char *GetName(){return mName;}
    char *GetDuty(){return mZw;}
};

int main()
{
    Teacher tc(22,"张三","教授");
    cout << tc.GetName() <<  "  " << tc.GetWorkAge() << "  " << tc.GetDuty() << endl;
    return 0;
}