#include <iostream>
using namespace std;
class ornek{
int notlar;
public:
friend void al(ornek ogrenci);
friend void goster(ornek ogrenci);
}ogr1,ogr2,ogr3;
void al(ornek ogrenci){
cout << "notu gir: ";
cin >> ogrenci.notlar;
}
void goster(ornek ogrenci){
cout <<...