#include <iostream> 
#include <string>
using namespace std; 

class Student
{
public: 
        int id;
        string Sname; 
        static int Num; 
        int Chi;
        int Eng;
        int Bcc;
        double Avg; 
        
        void ChiScore(int value) 
        {
        cout<<"請輸入國文成績 :";
        cin>>value;
        if (value<1)
        {
        value =1;
        }
        if (value>100)
        {value = 100;
        }
        Chi=value; 
        }
        
        void EngScore(int value) 
        {
        cout<<"請輸入英文成績 :";
        cin>>value;
        if (value<1)
        {
        value =1;
        }
        if (value>100)
        {value = 100;
        }
        Eng=value; 
        }

        void BccScore(int value) 
        {
        cout<<"請輸入計概成績 :";
        cin>>value;
        if (value<1)
        {
        value =1;
        }
        if (value>100)
        {value = 100;
        }
        Bcc=value; 
        }
        
        void GetAvg()
        {
        this->Avg = (Chi+Eng+Bcc)/3; 
        }
        
        Student() 
        {
        Num += 1;
        }
        
        ~Student ()
        {
        Num -= 1;
        }
        
        void GetStudentNum(int i)
        {
        cout<<"目前共有 "<<Num<<" 位學生:"<<endl;
        cout<<"第 "<<i+1<<" 位學生的成績入下:"<<endl;
        cout<<"學生姓名 : "<<Sname<<endl; 
        cout<<"國文 : "<<Chi<<endl;
        cout<<"英文 : "<<Eng<<endl; 
        cout<<"計概 : "<<Bcc<<endl;
        this->GetAvg();
        cout<<"平均 : "<<Avg<<endl; 
        }

};

int Student::Num=0; 
int main()
{
while (true) 
{
      int input; 
      cout<<"輸入指令 : 1.新增學生 2.列印學生資料 ";
      cin >>input; 
      switch (input)  
      {
      case 1:
           int i,number; 
           cout<<"輸入加入的學生人數 : ";
           cin>>number; 
           Student *ptr; 
           ptr = new Student [number];  

           for (i=0;i<number;i++) 
           {
           cout<<"輸入第 "<<i+1<<"位學生姓名 : "; 
           cin>>ptr->Sname; 
           ptr->ChiScore(ptr->Chi); 
           ptr->EngScore(ptr->Eng);
           ptr->BccScore(ptr->Bcc);
           ptr++;  
           }
           break;
       case 2: 
           ptr-=ptr->Num;
           for (i=0;i<ptr->Num;i++)
           {
           ptr->GetStudentNum(i);
           ptr++;
           }
           break;
       default:
           system("pause");
           return 0; 
       }
}
    system("pause");
    return 0 ;   
}