c++类与对象 学生管理

#include
using namespace std;
class CStudent
{
	public:
		string name;
		char *studentid;
		float score;
		CStudent();
		CStudent(char*,char*,float);
		~CStudent();
		void modify(char*,char*,float);
		void print();
		static int obcount;
};
int CStudent::obcount=0;
CStudent::CStudent()
{
	name=" ";
	studentid=new char[12];
	strcpy(studentid," ");
	score=0.0;
	obcount++;
}
CStudent::CStudent(char* name_,char* id,float s)
{
	name=name_;
	studentid=new char[strlen(id)+1];
	strcpy(studentid,id);
	score=s;
	obcount++;
}
CStudent::~CStudent()
{
	delete []studentid;
	obcount--;
}
void CStudent::modify(char *name_,char *id,float s)
{
	name=name_;
	strcpy(studentid,id);
	score=s;
}
void CStudent::print()
{
	cout<<"Name:"<=60) pass++;
	else fail++;
	if(student_2.score>=60) pass++;
	else fail++;
	if(student_3.score>=60) pass++;
	else fail++;
}
void Cclass::print()
{
	cout<<"班级成员"<max) max=student_2.score;
	if(student_3.score>max) max=student_3.score;
}
void Canalysis::print()
{
	 cout << "班级平均成绩：" print();
    Canalysis analysis_d; 
    p = &analysis_d; //基类指针 p 存派生类对象地址
    p->find(); //基类指针 p 调用派生类的成员函数，实现多态性
    p->print(); 
    return 0;
}

主函数也可以这样调用

int main()
{

    Cclass *p=new Cclass;
    p->find();
    p->print();
    Cclass *p1 = new Canalysis; 
    p1->find(); 
    p1->print(); 
    return 0;
}