#include<iostream.h>
class person
{

protected:
	char name[20];
	static int num;
public:
	person();
	static int getnum(){return num;}
	
};
class student:public person
{
private:
	float score;
public:
	student();
	void display();
	friend void gertotal();
};
class teacher:public person
{
private:
	char sub [30];
public:
	teacher();
    void display();
	friend void gertotal();
};
int person::num=0;
person::person()
{
	cin>>name;
	num++;
}
student::student()
{
	cout<<"請輸入"<<name<<"同學的分數："<<endl;
	cin>>score;
}
void student::display()
{
	cout<<name<<"同學的分數為：   "<<score<<endl;
}

teacher::teacher()
{
	cout<<"請輸入"<<name<<"老師的專業："<<endl;
	cin>>sub;
}
void teacher::display()
{
	cout<<name<<"老師的專業為：   "<<sub<<endl;
}
void gettotal()
{
	cout<<"此時老師和學生的總數為："
		<<student::getnum()+teacher::getnum()
		<<endl;
}
void main()
{
	char x,c1,c2;
	do
	{
		do
		{
			cout<<"請選擇您要輸入人員的身份（s(S):學生，t(T):老師）"
			<<endl;
			cin>>x;
			if(x=='s'||x=='S')
			{
				cout<<"請輸入該學生的姓名："<<endl;
				student stu;
				c1='n';
				stu.display();
			}
			else if(x=='t'||x=='T')
			{
				cout<<"請輸入該老師的專業"<<endl;
				teacher tea;
				c1='n';
				tea.display();
			}
			else
			{
				cout<<"輸入錯誤！"<<endl
					<<"是否要重新輸入？（y:是，n:否）:";
				cin>>c1;
			}
		}while(c1=='y');
		cout<<"是否要結束錄入？（y(Y):結束，n(N)：繼續）"<<endl;
		cin>>c2;
	}while(c2=='n'||c2=='N');
}