studentlist.h

呵呵 就是大学二年级的我的课程设计啦

#ifndef STUDENTLIST_H_A
#define STUDENTLIST_H_A
#include<list>
const int NUM_SUBJECT=5;
using namespace std;

struct student
{  string name;//姓名
   string number;//学号
   float score[NUM_SUBJECT];//各科成绩
   float sum;//总成绩
   float average;
};

class StudentList:public list<student*>
{  
   friend ostream& operator<< (ostream& os,const StudentList& r1);
   friend istream& operator>> (istream& is,StudentList& r2);
   public:

       void clear()
	   {  iterator it;
	      iterator it_end=end();
		  for(it=begin();it!=it_end;it++)
		  {  delete *it;
		  }
		  list<student*>::clear();
	   }

	   iterator erase(iterator where)
	   {  delete *where;
	      return list<student*>::erase(where);
	   }
	   
	   
	   ~StudentList()
		{  this->clear();
		}
};
#endif//STUDENTLIST_H_A