Type
        TipStudent = record
        Ime : string [25];
        EGN : string [10];
        Fn : string[6];
        Ocenki : array[1..10] of Real;
        SrUspeh : real;
        End;

//sazdavane na FL i promenliva student : TipStudent
Var FL : file of TipStudent;
        ImeFL : string[20];
        Student : TipStudent;
        C : byte; {*}
        i : integer;
        Sum: real;
        Ch : char; {*}

//procedura za sazdavane na nov fail
Procedure CreateFile;
Begin
Rewrite(FL);Close(FL);
writeln();
readln(imeFL);
writeln;
Writeln('Failut e sazdaden.');
End;

//funkciq za izchislqvane na sredniq uspeh na vseki edin ot studentite
Function Uspeh : Real;
    Begin
With student do Begin
    Sum:=0;
      For i:=1 to 10 do begin
Sum:=Sum+Ocenki[i];
end;            End;
     Uspeh:=Sum/10
End;

//Procedure za vuvejdane na dannite za edin student
Procedure ReadStudent;
Begin
        With Student do
        Begin
        WriteLn(' ':30,'Vuvedete imeto : ');Readln(Ime);
        WriteLn(' ':30,'Vuvedete EGN: ' );Readln(EGN);
        WriteLn(' ':30,'Vuvedete FN: ' );Readln(FN);
        WriteLn(' ':30,'Vuvedete ocenkite po 10 disciplini: ' );
        for i:=1 to 10 do begin
      Writeln('Vuvedete ocenka za ' ,i, ' - tata disciplina');
          Readln(Ocenki[i]);
                end;
        Student.SrUspeh := Uspeh;{*}
        End
End;

//Procedure za izvejdane dannite na edin student
Procedure WriteStudent;
Begin
        With Student do Writeln ('Ime : ',Ime, '':21-Length(Ime)
        , 'EGN : ', EGN, ' FN : ',fn,' Sreden Uspeh : ',SrUspeh:2:3);
    for i:=1 to 10 do begin
      Writeln('ocenka za ',i,' - tata disciplina ',Student.Ocenki[i]:3:1);
                end;

End;

//Procedure za dobavqne na komponenti kam faila
Procedure Dobaviane;
{Var NomEL: integer;}
Begin
Reset (FL);
Repeat
Seek(FL,FileSize(FL));
ReadStudent; Write(FL,Student);
Writeln('Shte produljite li vuvejdaneto? '); readln(Ch);
Until Ch in ['N','n'];
Close(FL);
end;

//Procedure za iztrivane na komponenta
Procedure Iztrivane;
//Pomoshten file nujen  za iztrivaneto
Var DeLFL: file of TipStudent;
        EGN : string[10];//EGN za iztrivane
        Begin
        Write('Vuvedete EGN : ');Readln(EGN);
        Reset(FL);
        Assign (DeLFL, 'DeL');Rewrite(DeLFL);
        While not EOF (FL) do
        Begin
        Read(FL,Student);
        If Student.EGN<>EGN
                then Write(DeLFL,Student)
                else Writeln('Dannite za lice s EGN ',EGN,' sa iztriti.');
        End;
close(FL);Close(DeLFL);
Erase(FL);Rename(DeLFL,ImeFL);
writeln;
End;


// Function izchislqvane na sreden uspeh na vseki edin ot studenti


//Procedura broi dvoiki


//procedura za izvejdane na mujete s povveche ot 5 dvoiki
Procedure Men;
var br: integer;
        pol,gr:byte;
        Begin
        Reset (FL);
        While not EOF (FL) do
        With student do Begin
        Read(FL,student);
        Val(Copy(EGN,9,1),POL,gr);
        if not (odd(pol)){(pol=0) or (pol=2) or (pol=6) or (pol=8)} then begin
        br:=0;
        for i:=1 to 10 do begin
        if student.ocenki[i]=2 then begin
        br:=br+1;end; end;
        if br>5 then begin
        writeln('Studentut s FN : ',FN, ' ima poveche ot 5 dvoiki! ');
        End;
                               End;
                         End;
        close(FL);
        readln;
        end;

//procedura spisak
Procedure Spisak;
Begin
     reset(FL);
    While not EOF(FL) do begin
          With Student do begin
          Read(FL,Student);
          WriteStudent;
          writeln();
          end;
    end;
    close(FL);
End;


//glavna programa MENU
BEGIN
          Write('Zadaite ime na faila : ');Readln(ImeFL);
  Assign(FL,ImeFL);
  repeat
       Writeln(' ':20,'MENU');
       Writeln(' ':20,'Izberete opciq ot MENU-to po dolo');
       Writeln(' ':30,'1 - Suzdavane na nov file');
       Writeln(' ':30,'2 - Dobavqne na student');
       Writeln(' ':30,'3 - Iztrivane na student');
       Writeln(' ':30,'4 - Izvejdane na dannite na vsichki');
       Writeln(' ':30,'5 - Izvejdane na FN na majete s poveche ot 5 dvoiki');
       Writeln(' ':30,'0 - Izhod ot programata');
       Readln(C);
       Case C of
  1 : CreateFile;
  2 : Dobaviane;
  3 : Iztrivane;
  4 : Spisak;
  5 : Men;
  end
  until c=0;
  END.