teacherandsyudent.txt

C++的小程序

#include <iostream.h>
#include <stdlib.h>
#include <iomanip.h>
#include <fstream.h>
#include <string.h>
#include <math.h>
/*
class base
{
public:
	//构造  赋值  显示
	base(char name[]="")
	{
		strcpy(this->name,name);
	}
	virtual void setdata()
	{
		cout<<"请输入姓名:";cin>>name;
	}
	virtual void display()
	{
		cout<<"姓名:"<<name<<endl;
	}
	virtual bool isgood()=0;
	char* getName(){return name;}
private:
	char name[20];
};
class student:public base
{
public:
    //构造  赋值  显示
	student(char name[]="",float num=0):base(name)
	{
		this->num=num;
	}
	void setdata()
	{
		base::setdata();
		cout<<"请输入成绩:";cin>>num;
	}
	void display()
	{
		base::display();
		cout<<"成绩:"<<num<<endl;
	}
	
	bool isgood()
	{
		return num>90;
	}
	
private:
	float num;
};
class teacher:public base
{
public:
    //构造  赋值  显示
	teacher(char name[]="",int num=0):base(name)
	{
		this->num=num;
	}
	void setdata()
	{
		base::setdata();
		cout<<"请输入论文数:";cin>>num;
	}
	void display()
	{
		base::display();
		cout<<"论文数:"<<num<<endl;
	}
	
	bool isgood()
	{
		return num>3;
	}
	
private:
	int num;
};
void main()
{
	base *b[100];
	char ch;
	int n=0;
	do
	{
		cout<<"输入老师(s)或学生(t)?:";cin>>ch;
		switch(ch)
		{
		case 's':
		case 'S':
			b[n]=new teacher();
			b[n]->setdata();
			n++;
			break;
		case 't':
		case 'T':
			b[n]=new student();
			b[n]->setdata();
			n++;
			break;
		default:
			cout<<"请选择错误，请重新选择!"<<endl;
		}
		cout<<"是否继续?(Y/N)";cin>>ch;
	}while(ch=='y' || ch=='Y');
		system("pause");
		system("cls");
	
	fstream f;
	f.open("base.txt",ios::out|ios::app);

	cout<<"优秀的老师和学生信息如下:"<<endl;
	for(int i=0;i<n;i++)
		if(b[i]->isgood()==true)
	{
		b[i]->display();
		f<<b[i]->getName()<<endl;
	}

	f.close();