Delphi dasturiy vostasi-bu Windows uchun mo’ljallangan dasturlash mu

procedure TPerson.Show;
begin
Write ( 'Nom:' + fname + #13+ 'Adres:' + faddress );
end;

Usul tanasida ob’ekt maydonlariga murojaat kilinganda ob’ekt nomi ko’rsatilmaydi.

Usulga murojaat qilish dasturda uning nomini ko’rsatish bilan bajariladi. Masalan:
Var
MyObject: TchildClass;
y: Real;
Begin
. . . . . . . . . . . . . . .
MyObject. SecondProc;
y:=MyObject.FirstFunc(3.14);
End;


Sinfda aniqlangan usullarni statistik, virtual (Virtual), dinamik (Dynamic) yoki abstrakt turlarga bo’lish mumkin. Agar usul turi ko’rsatilmasa, u avtomatik ravishda statistik turni oladi. Masalan:
Type
TBase=Class
Procedure MyJoy; Virtual;
End;
Tdescedant=Class(TBase)
Procedure MyJoy; Override;
End;
Var
FirstObject: TBase;
SecondObject: TDescedant;
Begin
. . . . . . . . . . . . .
FirstObject.MyJoy;
SecondObject.MyJoy;
. . . . . . . . . . . . .
End;
Sinf davomchisida ishlatiladigan usul uchun Override kalit so’zi ko’rsatilishi lozim.

Agar Tbase sinfida MyJoy usuli dinamik bo’lsa, Virtual so’zi Dynamic so’ziga almashtiriladi. Ularning asosiy farqi murojaat qilinganda Virtual usul vaqt jihatdan ancha effektiv bo’lsa, Dynamic usul esa operativ xotiradan ratsional foydalanish imkonini beradi.