/////////////////////////////


///////////////////////////////

#include<iostream>
#include<fstream>
#include<cstdlib>
#include<string>

using namespace std;
int newratingsame(int ro, int s, int rop);
int newratingdiffr(int ro, int s, int rop);
int newratingdiffp(int ro, int s, int rop);
void initdisplay();
void secdisplay();
int main()
{
    string b,c,d,e,f,g,h;
    int a, ro, s, rop;
    initdisplay();
    cin >>a;
    if (a == 1)
    {
          cout <<"Name of new player (no spaces):";
          getline (cin,b);
          c=b+"ratings.txt";
          ofstream myfile3("namelist.txt");
          myfile3 <<b <<"\n";
          ofstream myfile2(c.c_str());
          d="1200";
          myfile2 <<d;
          cout <<"Player added successfully, press enter to continue:";
          system("PAUSE");
          initdisplay();
    }
    if (a == 2)
    {
          int ab,pa,pb;
          secdisplay();
          cin >>ab;
          if(ab==1)
          {
           string i,ia,is,ias;
           int ans,ansa;
           ifstream myfile4("namelist.txt");
               while (! myfile4.eof() )
                    {
                     getline (myfile4,e);
                     cout << e << endl;
                    }
               cout<<"Player 1's NAME:";
               getline (cin, i);
               i=i+"ratings.txt";
               ifstream myfile7(i.c_str());
               cout<<"Player 2's NAME:";
               getline (cin, ia);
               ia=ia+"ratings.txt";
               ifstream myfile6(ia.c_str());      
               while (! myfile7.eof() )
                    {
                     getline (myfile7,is);
                     cout << is << endl;
                    }
               while (! myfile6.eof() )
                    {
                     getline (myfile6,ias);
                     cout << ias << endl;
                    }
               cout <<"\nenter P1 original rating (see above):";
               cin >>pa;
               cout <<"\nenter P2 rating (see above):";
               cin >>pb;
               
               //player 1
               cout <<"did P1 win (1) lose(-1) or draw(0); enter correct number:";
               cin >>s;
               ans=newratingsame(pa,s,pb);
               ofstream myfile8(i.c_str());
               myfile8 <<ans;
               //player2
               cout <<"did P2 win (1) lose(-1) or draw(0); enter correct number:";
               cin >>s;
               ansa=newratingsame(pb,s,pa);
               ofstream myfile9(ia.c_str());
               myfile9 <<ansa;
               cout <<"done";
               system("PAUSE");
               initdisplay();
               
         
    }
    if (a == 3)
    {
          ifstream myfile4("namelist.txt");
               while (! myfile4.eof() )
                    {
                     getline (myfile4,e);
                     cout << e << endl;
                    }
          cout << "Enter name of player whose rating you want to see:";
          getline (cin,f);          
          g=f+"ratings.txt";
          ifstream myfile5(g.c_str()); 
              while (! myfile5.eof() )
                    {
                     getline (myfile5,h);
                     cout << h << endl;
                    }
          initdisplay();
    }
    if (a ==4)
    {system("PAUSE");}
    system("PAUSE");
    return 0;
}
    void initdisplay()
    {
         cout << "////////////////////////////////////\n";
         cout << "Chess Rating Manager v1.0\n";
         cout << "Sreenath Pillai\n";
         cout << "////////////////////////////////////\n\n\n\n";
         cout << "[1] Add Player\n";
         cout << "[2] Score Game\n";
         cout << "[3] Check Ratings\n";   
         cout << "[4] Quit\n";
         cout << "\n\nChoose:";
    }   
    void secdisplay()
    {
         cout << "\n\n[1] both players rated OR both players provisional\n";
         cout << "[2] one player rated and one player provisional\n"; 
         cout << "[3] Back";
         cout << "\n\nChoose:";
    }              
    int newratingsame(int ro, int s, int rop)
        {
              return (ro + (s*21) + ((rop-ro)/25));
        }
    int newratingdiffr(int ro, int s, int rop)
        {
              return (ro + (s*6) + ((rop-ro)/100));
        }
    int newratingdiffp(int ro, int s, int rop)
        {
              return ((.8*ro) + (.2*rop) + (s*80);
        }