// Class Level Privacy
 // classLevelPrivacy.cpp
 // OOP244
 // Jun 8 2009

 #include <iostream>
 #include <cstring>
 using namespace std;
 const int M = 13;

 class Student {
     int no;
     char grade[M+1];
 public:
     void set(const Student& src); 
     void set(int, const char*);
     void display() const;
 };

 // sets current object using data from src
 //
 void Student::set(const Student& src) { 
     no = src.no;
     strcpy(grade, src.grade); 
 }
 
 // resets the values of the data members
 //
 void Student::set(int n, const char* g){
     int valid = n > 0 && strlen(g) <= M;
     for (int i = 0; valid && g[i] != '\0'; i++)
         valid = g[i] >= 'A' && g[i] <= 'D'
          || g[i] == 'F';
     if (valid) {
         no = n;
         strcpy(grade, g);
     }
 }

 void Student::display() const {
     cout << no << ' ' << grade << endl;
 }

 int main () {
     Student harry, james;

     harry.set(1234, "ABACA");
     james.set(1235, "BBCDC");
     harry.display();
     james.display();
     harry.set(james);
     harry.display();

     return 0;
 }