实验6 类的继承与派生

实验6 类的继承与派生

一、实验目的
（1）掌握继承和派生的定义，派生类的定义方法和继承方式。
（2）掌握派生类中的构造函数的使用。
（3）掌握多重继承的概念、定义方法、多重继承派生类构造函数的执行顺序。
（4）掌握虚基类的概念和定义方法。

二、实验内容
定义一个基类有姓名、性别、年龄；再由基类派生出教师类和学生类，教师类增加工号、职称和工资，学生类增加学号、班级、专业和入学成绩；由学生类和教师类派生在职研究生类和在读教师类，在职研究生类增加工作单位。

三、实验要求

1. 在进行多重继承中，将基类作为虚基类。
   2.利用构造函数对类对象进行初始化。
   3.对各种类的对象信息进行修改、添加、查询、显示等操作。
   4.将教师类的职称和工资定义为private型成员，其它类的成员变量和成员函数类型依据需要定义为public或protected 或private型

头文件head.h

#ifndef  _IQUERY_H
#define _IQUERY_H 1
#include
class people
{
     
protected:
	string name,sex;
	int age;
public:
	void input();
	void output();
	void change(int x);
	int search(string pname)const;
	int getyear();
};
class teacher:virtual public people
{
     
private:
	string position;
	int payment;
protected:
	string no;
public:
	void input();
	void output();
	void change(int);
	int search2(string pno)const;
};
class student:virtual public people
{
     
protected:
	string no,clas,major;
	double score[3];
public:
	void input();
	void output();
	void change(int);
	int search1(string pno)const;
};
class master:virtual public teacher,virtual public student
{
     
private:
   string po;
public:
	void input();
	void output();
	void change(int);
};
class stuteacher:virtual public teacher,virtual public student
{
     
public:
	void input();
	void output();
	void change(int);
};
#endif

成员函数定义文件1.cpp

#include
#include
using namespace std;
#include
int people::getyear()
{
     
	return age;
}
void people::input()
{
     
	cout<<"请输入姓名: ";
	cin>>name;
	cout<<"请输入性别: ";
	cin>>sex;
	cout<<"请输入年龄: ";
	cin>>age;
}
void people::output()
{
     	
	cout<<"姓名: "<<name<<endl;
	cout<<"性别: "<<sex<<endl;
	cout<<"年龄: "<<age<<endl;
}
void people::change(int x)
{
     
	switch(x)
	{
     
	case 1:cin>>name;break;
	case 2:cin>>sex;break;
	case 3:cin>>age;break;
	default:break;
	}
}
void student::input()
{
     
	int i;
	people::input();
   	cout<<"请输入学号: ";
	cin>>no;
	cout<<"请输入班级: ";
	cin>>clas;
	cout<<"请输入专业: ";
	cin>>major;
    cout<<"请输入各科成绩: ";
	for(i=0;i<3;i++)
		cin>>score[i];
}
void student::output()
{
     
	int i;
	people::output();
	cout<<"学号: "<<no<<endl;
	cout<<"班级: "<<clas<<endl;
	cout<<"专业: "<<major<<endl;
	cout<<"各科成绩: ";
	for(i=0;i<3;i++)
		cout<<score[i]<<"  ";
}
void student::change(int x)
{
     
	int i;
	switch(x)
	{
     
	case 1:;
	case 2:;
	case 3:people::change(x);break;
	case 4:cin>>no;break;
	case 5:cin>>clas;break;
	case 6:for(i=0;i<3;i++) cin>>score[i];break;
	default:break;
	}
}

void teacher::input()
{
     
    people::input();
   	cout<<"请输入职位: ";
	cin>>position;
	cout<<"请输入工资: ";
	cin>>payment;
	cout<<"请输入工号: ";
	cin>>no;
}
void teacher::output()
{
     
	people::output();
	cout<<"职位: "<<position<<endl;
	cout<<"工资: "<<payment<<endl;
	cout<<"工号: "<<no<<endl;
}
void teacher::change(int x)
{
     
	switch(x)
	{
     
	case 1:;
	case 2:;
	case 3:people::change(x);break;
	case 4:cin>>position;break;
	case 5:cin>>payment;break;
	case 6:cin>>no;break;
	default:break;
	}
}
void master::input()
{
     
	int i;
	teacher::input();
   	cout<<"请输入学号: ";
	cin>>student::no;
	cout<<"请输入班级: ";
	cin>>clas;
	cout<<"请输入专业: ";
	cin>>major;
    cout<<"请输入各科成绩: ";
	for(i=0;i<3;i++)
		cin>>score[i];
	cout<<"请输入工作单位: ";
	cin>>po;
}
void master::output()
{
     
	int i;
	teacher::output();
	cout<<"学号: "<<student::no<<endl;
	cout<<"班级: "<<clas<<endl;
	cout<<"专业: "<<major<<endl;
	cout<<"各科成绩: ";
	for(i=0;i<3;i++)
		cout<<score[i]<<"  ";
	cout<<endl<<"工作单位:  "<<po;

}
void master::change(int x)
{
     
	int i;
	switch(x)
	{
     
	case 1:;
	case 2:;
	case 3:;
	case 4:;
	case 5:;
	case 6:teacher::change(x);break;
	case 7:cin>>student::no;break;
	case 8:cin>>clas;break;
	case 9:for(i=0;i<3;i++) cin>>score[i];break;
	case 10:cin>>po;
	default:break;
	}
}
void stuteacher::input()
{
     
	int i;
	teacher::input();
   	cout<<"请输入学号: ";
	cin>>student::no;
	cout<<"请输入班级: ";
	cin>>clas;
	cout<<"请输入专业: ";
	cin>>major;
    cout<<"请输入各科成绩: ";
	for(i=0;i<3;i++)
		cin>>score[i];
}
void stuteacher::output()
{
     
	int i;
	teacher::output();
	cout<<"学号: "<<student::no<<endl;
	cout<<"班级: "<<clas<<endl;
	cout<<"专业: "<<major<<endl;
	cout<<"各科成绩: ";
	for(i=0;i<3;i++)
		cout<<score[i]<<"  ";

}
void stuteacher::change(int x)
{
     
	int i;
	switch(x)
	{
     
	case 1:;
	case 2:;
	case 3:;
	case 4:;
	case 5:;
	case 6:teacher::change(x);break;
	case 7:cin>>student::no;break;
	case 8:cin>>clas;break;
	case 9:for(i=0;i<3;i++) cin>>score[i];break;
	default:break;
	}
}
int people::search(string pname)const
{
     
	if(this->name.compare(pname)==0)
    return 1;
    else return 0;
}
int student::search1(string pno)const
{
     
	if(this->no.compare(pno)==0)
    return 1;
    else return 0;
}
int teacher::search2(string pno)const
{
     
	if(this->no.compare(pno)==0)
    return 1;
    else return 0;
}

主函数文件main.cpp

#include
#include
using namespace std;
#define MAX 10
int n1=0,n2=0,n3=0,n4=0,n5=0;
#include
people a[MAX];
student b[MAX];
teacher c[MAX];
master d[MAX];
stuteacher e[MAX];
void mainscreen()
{
     	
	cout<<"     信息管理系统 ver0.0.0.1"<<endl;
    cout<<"*********************************"<<endl;
	cout<<"*        a.录入人员信息   *"<<endl;                      
	cout<<"*        b.查询人员信息   *"<<endl;
	cout<<"*        c.显示人员信息   *"<<endl;
    cout<<"*        d.退出系统         *"<<endl;
	cout<<"*        e.清屏               *"<<endl;
	cout<<"*********************************"<<endl;
}	
void in()
{
     
    char w,m;
	cout<<"***********************************"<<endl;
	cout<<"*    a.录入一般人员信息   *"<<endl;                      
	cout<<"*    b.录入学生信息         *"<<endl;
	cout<<"*    c.录入教师信息         *"<<endl;
	cout<<"*    d.录入在职研究生信息*"<<endl;
	cout<<"*    e.录入在读教师信息   *"<<endl;
    cout<<"***********************************"<<endl;
	cout<<"  输入需要的服务类型："; 
	cin>>w;
	do{
     
	  
		if(w=='a')
		{
      
		  for(;;)
			{
     
	           a[n1].input();n1++;
	           cout<<"是否继续输入？是请按y，其余为否。";
               cin>>m;
	           if(m!='y') break;
		}
		  break;
		}
	    if(w=='b')
		{
      
			for(;;)
			{
     
	           b[n2].input();n2++;
	           cout<<"是否继续输入？是请按y，其余为否。";
               cin>>m;
	           if(m!='y') break;
			}
			break;
		}
		if(w=='c')
		{
     
			for(;;)
			{
     
	            c[n3].input();n3++;
	            cout<<"是否继续输入？是请按y，其余为否。";
                cin>>m;
	            if(m!='y') break;
			}
			break;
		}
		if(w=='d') 
		{
     
			for(;;)
			{
     
	             d[n4].input();n4++;
	             cout<<"是否继续输入？是请按y，其余为否。";
                 cin>>m;
	             if(m!='y') break;
			}
			break;
		}
		if(w=='e')
		{
     
			for(;;)
			{
     
	            e[n5].input();n5++;
	            cout<<"是否继续输入？是请按y，其余为否。";
                cin>>m;
	            if(m!='y') break;
			}
			break;
		}
	}while(w!='a'&&w!='b'&&w!='c'&&w!='d'&&w!='e');
}
void cz()
{
     
    cout<<"*********************************"<<endl;
	cout<<"*        a.按姓名查询        *"<<endl;                      
	cout<<"*        b.按学号查询        *"<<endl;
	cout<<"*        c.按工号查询        *"<<endl;
    cout<<"*********************************"<<endl;
	char w;
	cin>>w;
	int i;
	int a1=100,a2=100,a3=100,a4=100,a5=100;
	string search;		
	switch(w)
	{
     
	case 'a':
            cout<<"请输入要查询的姓名："<<endl; 
            cin>>search; 
            for(i=0;i<=n1;i++)
			{
     
				if(a[i].search(search))
				{
     
					a[i].output(); 
				    a1=i;
				}
			}
			for(i=0;i<=n2;i++)
			{
     
				if(b[i].search(search))
				{
     
					b[i].output(); 
				    a2=i;
				}
			}
			for(i=0;i<=n3;i++)
			{
     
				if(c[i].search(search))
				{
     
					c[i].output();
			    	a3=i;
				}
			}
			for(i=0;i<=n4;i++)
			{
     
				if(d[i].search(search))
				{
     
					d[i].output(); 
				    a4=i;
				}
			}
			for(i=0;i<=n5;i++)
			{
     
				if(e[i].search(search))
				{
     
					e[i].output(); 
				    a5=i;
				}
			}
            break;
	case 'b':
		    cout<<"请输入要查询的学号："<<endl; 
            cin>>search; 
			for(i=0;i<=n2;i++)
			{
     
				if(b[i].search1(search))
				{
     
					b[i].output(); 
				    a2=i;
				}
			}
			for(i=0;i<=n4;i++)
			{
     
				if(d[i].search1(search))
				{
     
					d[i].output(); 
				    a4=i;
				}
			}
			for(i=0;i<=n5;i++)
			{
     
				if(e[i].search1(search))
				{
     
					e[i].output(); 
				    a5=i;
				}
			}
			break;
	case 'c':cout<<"请输入要查询的工号："<<endl; 
            cin>>search; 
			for(i=0;i<=n3;i++)
			{
     
				if(c[i].search2(search))
				{
     
					c[i].output(); 
					a3=i;
				}
			}
			for(i=0;i<=n4;i++)
			{
     
				if(d[i].search2(search))
				{
     
					d[i].output(); 
					a4=i;
				}
			}
			for(i=0;i<=n5;i++)
			{
     
				if(e[i].search2(search))
				{
     
					e[i].output(); 
					a5=i;
				}
			}
			break;
	default:break;
	}			
	cout<<"是否要修改信息？按y修改，否则默认不修改，若无信息输出，请无视此提示。";
		cin>>w;
	if(w=='y')
	{
     
		if(a1!=100)
		{
     
			cout<<"请输入要修改的项目: "<<endl;
			cout<<"1.姓名;"<<endl<<"2.性别;"<<endl<<"3.年龄。"<<endl;
            cin>>i;
			cout<<"请输入修改后结果：";
			a[a1].change(i);
		}
		if(a2!=100)
		{
     
			cout<<"请输入要修改的项目: "<<endl;
			cout<<"1.姓名;"<<endl<<"2.性别;"<<endl<<"3.年龄;"<<endl;
			cout<<"4.学号;"<<endl<<"5.班级;"<<endl<<"6.成绩。"<<endl;
            cin>>i;
			cout<<"请输入修改后结果：";
			b[a2].change(i);
		}
		if(a3!=100)
		{
     
			cout<<"请输入要修改的项目: "<<endl;
			cout<<"1.姓名;"<<endl<<"2.性别;"<<endl<<"3.年龄;"<<endl;
			cout<<"4.职位;"<<endl<<"5.工资;"<<endl<<"6.工号。"<<endl;
            cin>>i;
			cout<<"请输入修改后结果：";
			c[a3].change(i);
		}
		if(a4!=100)
		{
     
			cout<<"请输入要修改的项目: "<<endl;
			cout<<"1.姓名;"<<endl<<"2.性别;"<<endl<<"3.年龄;"<<endl;
			cout<<"4.职位;"<<endl<<"5.工资;"<<endl<<"6.工号;"<<endl;
            cout<<"7.学号;"<<endl<<"8.班级;"<<endl<<"9.成绩;"<<endl<<"10.工作单位。"<<endl;
            cin>>i;
			cout<<"请输入修改后结果：";
			d[a4].change(i);
		}
		if(a5!=100)
		{
     
			cout<<"请输入要修改的项目: "<<endl;
			cout<<"1.姓名;"<<endl<<"2.性别;"<<endl<<"3.年龄;"<<endl;
			cout<<"4.职位;"<<endl<<"5.工资;"<<endl<<"6.工号;"<<endl;
            cout<<"7.学号;"<<endl<<"8.班级;"<<endl<<"9.成绩。"<<endl;
            cin>>i;
			cout<<"请输入修改后结果：";
			e[a5].change(i);
		}
	}
}
void xs()
{
     
	int i;
	cout<<"一般人员信息："<<endl;
	for(i=0;i<=n1&&a[i].getyear()!=0;i++)
	{
     
		a[i].output();
		cout<<endl;
	}
	cout<<endl<<"学生信息："<<endl;
	for(i=0;i<=n2&&b[i].getyear()!=0;i++)
	{
     
		b[i].output();
		cout<<endl;
	}
	cout<<endl<<"教师信息："<<endl;
	for(i=0;i<=n3&&c[i].getyear()!=0;i++)
	{
     
		c[i].output();
		cout<<endl;
	}
	cout<<endl<<"在职研究生信息："<<endl;
	for(i=0;i<n4;i++)
	{
     
		d[i].output();
		cout<<endl;
	}
	cout<<endl<<"在读教师信息："<<endl;
	for(i=0;i<n5&&e[i].getyear()!=0;i++)
	{
     
		e[i].output();
		cout<<endl;
	}
}
void main()
{
     
    char w;
    while(1)
	{
     
		mainscreen();
	    cout<<"  输入需要的服务类型："; 
	    cin>>w;
	    do{
     
	         switch(w)
				 {
     
	                case 'a':in();break;
	                case 'b':cz();break;
		            case 'c':xs();break;
					case 'd':exit(0);break;
					case 'e':system("cls");break;
		            default:break;
			 }
		}while(w!='a'&&w!='b'&&w!='c'&&w!='d'&&w!='e');
	}

}

编译环境：Microsoft Visual C++ 6.0