main.cpp

this a good book.

#include<fstream.h>
#include<assert.h>
#include <string.h>
#define N 50

class CTeacher;

class CStudent
{ 
  public:
	  CStudent(char *name="未知",char *number="00000",double mark=0.0)
	  {
		  int len=strlen(name);
		  m_name=new char[len+1];
		  strcpy(m_name,name);
		  strcpy(m_number,number);
		  m_mark=mark;
	  }
	  ~CStudent()
	  {
		  delete []m_name;
	  }
	  void showMsg()
	  {  
		cout <<m_name<<"\t"<<m_number<<"\t"<<m_mark<<endl;
	  }
  protected:
   //**1**


};

class CTeacher
{
  public:
	 CTeacher(){};
	 ~CTeacher(){
		 for(int i=0;i<m_count;i++)
		 {
			 delete m_pStu[i];
			 m_pStu[i]=NULL;
		 }
	 };

	 int  Best(CStudent *pS[]);
	 void Input(); 
	 void Display(); 
	 void Sort();
  protected:
	 CStudent *m_pStu[N];
	 double  m_average;	 
	 int     m_count;
};

void CTeacher::Input()
{  
	ifstream in("records.txt");
	assert(in);
	char name[20];
	char number[5];
	double mark=0;
	m_count=0;
	cout <<"姓 名\t"<<"学 号\t"<<"成 绩\t"<<endl;
	for( int i=0; !in.eof(); i++){ 
		in>>name;
		in>>number;
		in>>mark;
		m_count++;
		m_pStu[i]=new CStudent(name,number,mark);
		cout <<name<<"\t"<<number<<"\t"<<mark<<endl;
	}
}
 
void CTeacher::Sort()
{  
  //**2**


}
void CTeacher::Display()
{
    cout <<"姓 名\t"<<"学 号\t"<<"成 绩\t"<<endl;
	for(int j=0; j<m_count; j++) 
	{ 
        m_pStu[j]->showMsg();
	}
}
int CTeacher::Best(CStudent *pS[])
{
  //**3**

}

void main()
{   
	CTeacher Teacher;
	CStudent *pStudent[N];
	
	Teacher.Input();	 
    Teacher.Sort();
    Teacher.Display();

	cout<<"查询成绩最高的学生信息："<<endl;
	int n=Teacher.Best(pStudent);
    while(n--)
	{ 
	  pStudent[n]->showMsg();
	}
}