Polimorfizm va uning turlari. Virtual funksiya. Abstrakt sinf va funksiyalar. 12 Mavzu

Virtual base classdan foydalanish

• class base { public: int i; };
• class derived1 : virtual public base { public: int j; };
• class derived2 : virtual public base { public: int k; };
• class derived3 : public derived1, public derived2 {
• public: int sum;};
• derived3 ob;
• ob. i = 10;
• ob.j = 20;
• ob.k = 30;
• ob.sum = ob.i + ob.j + ob.k;

• Bu holatda dastur to’g’ri ishlaydi

Funksiya overloadi uchun misol

• void f(int i){cout<<"int";}
• void f(char c){cout<<"char";}
• int main() { f(10); return 0; }
• Natija: int

• Method is overloading

Funksiya override uchun misol

• class Base{ public: virtual void display(int i) { cout<<"Base::"<display(10); return 0;}
• Natija: Derv::10

• Agar “virtual” kalit so’zi olib tashlansa
• Natija: Base::10

• Method overriding

Foydalanilgan adabiyotlar

• Herbert Shield “C++ The complete references – fourth edition” 2003. Part -2, Chapter – 17.
• TutorialsPoint – simply easy learning programming: http://www.tutorialspoint.com/cplusplus/cpp_inheritance.htm
• http://www.questionscompiled.com/answer/cpp/148/compile-time-polymorphism-and-run-time-polymorphism/

Xulosa

• Polimorfizm bu – bitta nom bilan bir nechta funksiyalarni qayta yuklanishidir.
• C++ da polimorfizm 2 ta usulda namoyon bo’ladi:
• 1- usul: funksiyalar va operatorlarning qo’shimcha yuklanishida.
• 2- usul: vorislik va virtual funksiyalardan foydalanishda vujudga keladi.

• MUHAMMAD AL-XORAZMIY NOMIDAGI TOSHKENT AXBOROT TEXNOLOGIYALARI UNIVERSITETI

• Mallayev Oybek
• Usmonqulovich

• “Informatika asoslari” kafedrasi dotsenti

• E’TIBORINGIZ UCHUN RAHMAT!