#include <list>

class C {
public:
  C ( int init = 0 );
  void reset ( int init );
};

int main()
{
  std::list<C> cl;

  cl.push_back ( C() ); // Insert one default constructed C at the end
  cl.push_front ( C ( 10 ) ); // Insert a C initialized with 10 at the beginning

  std::list<C>::iterator pos = cl.begin(); // Get an iterator to the first node

  pos->reset ( 20 ); // Call a member through the iterator
  cl.begin()->reset ( 40 ); // Call a member straight from cl.begin()

  ++pos; // Go to the next node
  pos->reset ( 80 ); // Call a member on the second node
}

 ofstream file; 
file.open("saves.txt");
it it2=cl.begin();
while (it2!=cl.end())
{ file<<it2->number<<" "<<it2->lname<<" "<<it2->fname<<endl;
}
file.close();

#include <list>
#include <fstream>
#include <iostream>
using namespace std;
class C {
public:
    void friend add(list<C>);
    void friend display(list<C>);

   string fname;
   string lname; 
   int number;
};
typedef list<C> List;
typedef List::iterator it;

int main()
{
 list<C> cl;
 cout<<"\t\t The Yellow Pages"<<endl;
 cout<<"\t\t\t A C++ program coded by"<<endl;
 cout<<endl<<endl<<endl;
 cout<<"This program simulates the famous Yellow Pages. "<<endl;
 cout<<"Please input your choice"<<endl;
 int choice; 

 cout<<"\t 1. Input new data."<<endl;
 cout<<"\t 2. Display data."<<endl;
 cin>>choice; 
 switch (choice)
  {case 1:
       add(cl); break;
  case 2: 
   display(cl); break; 
  default: 
      cout<<"Wrong input."<<endl;break; 
  }    
  cout<<endl;
  
  ofstream file; 
file.open("saves.txt");
it it2=cl.begin();
while (it2!=cl.end())
{ it2++; cout<<"bau bau";
}
file.close(); 
 system("pause");

}

void add(list<C> cl)
{char choice; 
int i=1;
cl.push_back( C() ); 
it it1=cl.begin();
do
  {cout<<"Enter first name and last name"<<endl;
   it1->number=i; i++;
   cin>>it1->fname; 
   cin>>it1->lname; 
   cout<<it1->lname<<" "<<it1->fname<<" has been added to the list."<<endl;
  cout<<"Press E if you want to add another member, or press Q if you wish to quit"<<endl; 
   cin>>choice; 
   if (choice!='E' && choice!='e' && choice!='q' && choice!='Q')
    do { cout<<"Wrong Input."<<endl;
    cin>>choice;} while (choice!='E' && choice!='e' && choice!='q' && choice!='Q');
     cl.push_back( C() ); 
     ++it1;
}     
  while (choice!='q' && choice!='Q');
}    


void display(list<C> cl)
{it it2=cl.end();
for (it2; it2!=cl.begin(); it2--)
 {cout<<it2->number<<". "<<it2->lname<<" "<<it2->fname<<";"<<endl;
};
}