sifra + kluc

//START Sifrovanie
    AnsiString kluc = InputBox("Zadajte váš klúč","klúč","");
    if ( kluc == "" ) {
        ShowMessage("Musite zadať kluc!!!!!!!!!");
    } else {
        AnsiString str = InputBox("Zadajte text, ktorý chcete zasifrovat","text","");
        AnsiChar c;
        int i = 1;
        int j = 1;
        if ( str == "" ) {
            ShowMessage("Musite zadať text!!!!!!!!!");
        } else {
            ofstream f;
            f.open("sifra-kluc.txt");
            while ( i <= str.Length() ) {
                if ( kluc.Length() == i ) {
                    j = 1;
                }
                c = str[i]+kluc[j];
                f.put(c);
                Label4->Caption=Label4->Caption + c;
                i++;
                j++;
            }
            f.close();
        }
    //END Sifrovanie
    //START Získanie šifry
        ifstream g;
        g.open("sifra-kluc.txt");
        AnsiString sifra;
        if ( g.good() ) {
            g.get(c);
            while ( g.good() ) {
                sifra += c;
                g.get(c);
            }
        }
        g.close();
    //END Získanie šifry
    //START Desifrovanie
        ofstream l;
        l.open("desifra-kluc.txt");
        i = 1;
        j = 1;
        while ( i <= sifra.Length() ) {
            if ( kluc.Length() == i ) {
                j = 1;
            }
            c = sifra[i]-kluc[j];
            l.put(c);
            Label5->Caption=Label5->Caption + c;
            i++;
            j++;
        }
        l.close();

    }
    //END Desifrovanie