类的继承与多态实验

cout<< "年龄: " << Person_Get_Age()<< endl;
cout<<"学院: "<< Teacher_Get_Department()<< endl<< endl;
string name;//姓名
string gender; //性别
string id_number; //身份证号码
};
class Student: public Person
{
public:
Student(string n,string g,string i,string c):Person(n,g,i)
{
private: string m_Department;
public:
Teacher() {}
Teacher(string name, string sex, int age, string department) :Person(name, sex, age)
{
m_Department = department;
id_number=the_id;
cout<<"Person类构造函数被调用！"<<endl;
}
void show()
{
cout<<"姓名："<<name<<endl;
cout<<"性别："<<gender<<endl;
cout<<"身份证号码："<<id_number<<endl;
}
protected:
{
name=the_name;
gender=the_gender;
id_number=the_id;
cout<<"Person类构造函数被调用！"<<endl;
}
void show()
{
cout<<"姓名："<<name<<endl;
cout<<"性别："<<gender<<endl;
cout<<"身份证号码："<<id_number<<endl;
cout<< "性别: " << Person_Get_Sex()<< endl;
cout<< "年龄: " << Person_Get_Age()<< endl;
cout<< "专业: " <<Student_Get_Speciality() << endl<< endl;
}
};
class Teacher :virtual public Person
{
m_Speciality = speciality;
}
~Student()
{
}
string Student_Get_Speciality()
{
return m_Speciality;
}
void Stu_print()
{
cout<<"学生信息：" << endl;
cout<<"姓名："<< Person_Get_Name() << endl;
}
~Teacher()
{
}
string Teacher_Get_Department()
{
return m_Department;
}
void Tea_print()
{
cout<<"老师信息：" << endl;
cout<<"姓名："<< Person_Get_Name() << endl;
cout<< "性别: " << Person_Get_Sex()<< endl;
{
department=d;
cout<<"Teacher类构造函数被调用！"<<endl;
}
protected:
string department;//教师所在单位
};
class Assistant:public Student,public Teacher
{
public:
Assistant(string n,string g,string i,string c,string d):Student(n,g,i,c),Teacher(n,g,i,d)
实验四 类的继承与多态实验
【实验目的】
1．理解软件重用性的一种形式——继承。
2．能够通过继承已有的类创建新类。
3．理解基类和派生类的概念。
4．能够在派生类中使用构造函数和析构函数
5．学习虚基类在解决二义性问题中的作用。
6．熟悉多态分类，理解静态联编和动态联编概念。
【实验内容】
1．编译运行下列程序，分析出现编译错误的原因，并给出解决办法。
{
classname=c;
cout<<"Student类构造函数被调用！"<<endl;
}
protected:
string classname;//学生所在班级
};
class Teacher: public Person
{
public:
Teacher(string n,string g,string i,string d):Person(n,g,i)
a.disp();
return 0;
}
解决方法二：（虚基类技术）
#include<iostream>
#include<string>
using namespace std;
class Person
{
public:
Person(string the_name,string the_gender,string the_id)
{}
void disp()
{
show();
cout<<"班级："<<classname<<endl;
cout<<"系部："<<department<<endl;
}
};
int main()
{
Assistant a("李玮","男","420300199212032323","软件141","电信系");
{
department=d;
cout<<"Teacher类构造函数被调用！"<<endl;
}
protected:
string department; //教师所在单位
};
class Assistant:public Student,public Teacher
{
public:
Assistant(string n,string g,string i,string c,string d):Student(n,g,i,c),Teacher(n,g,i,d)
a.disp();
return 0;
}
解决方法一：（通过作用域符号来唯一标识）
#include<iostream>
#include<string>
using namespace std;
class Person
{
public:
Person(string the_name,string the_gender,string the_id)
}
};
class Student :virtual public Person
{
private: string m_Speciality;
public:
Student() {}
Student(string name, string sex, int age,string speciality):Person(name,sex,age)
{
classname=c;
cout<<"Student类构造函数被调用！"<<endl;
}
protected:
string classname; //学生所在班级
};
class Teacher:virtual public Person
{
public:
Teacher(string n,string g,string i,string d):Person(n,g,i)
}
protected:
string name; //姓名
string gender; //性别
string id_number; //身份证号码
};
class Student:public Person
{
public:
Student(string n,string g,string i,string c):Person(n,g,i)