Emendatio ex 09:58, 27 Aprilis 2013 recensere Rafaelgarcia (disputatio \| conlationes) Magistratus 22 242 edits →‎Classes et obiecta ← Differentia superior		Emendatio ex 18:06, 27 Aprilis 2013 recensere abrogare 118.160.19.127 (disputatio) →‎Classes et obiecta Differentia proxima →
Linea 54: === Classes et obiecta === C++ ad C syntaxim [[lingua obiecta spectans\|linguarum obiecta spectantium]] introduxit. Classibus cum definiuntur praebentur : abstractio, incapsulatio, hereditas, polymorphismus, et superpositio. Classis ita cogitari potest ut forma ex qua obiecta individua cudantur cum programma operatur. Classis definita idem ac int aut float in programmate fungit, et obiecta declarata idem ac variabiles huius classis. Classes igitur sinunt programmatores omnino nova genera variabilium definire et adhibere quae similia sunt int, float, etc. <source lang="cpp"> #include <iostream> #include <cstring> using namespace std; class persona() { public: //haec data et functiones publice commutari et haberi possunt string nomen; int aetasData(); private: //haec data et functiones sola per methodos huius classis commutari et haveri possunt int annusPraesens = 2013; int annusNatalis; int aetas; void aetatemPonere(); }; void persona::aetatemPonere() //Sola hac methodo aetas personae poni potest { cout<<"Quo anno natus est?" cin>>annusNatalis; aetas= 2013-annusNatalis; } int persona::aetasData() //Sola hac methodo aetas personae dari potest { return aetas; } void persona::persona() //Hic est classis constructor { cout<<"Nomen?"; cin>>nomen; aetatemPonere(); } int main() { persona Maria; persona *Caesar = new Persona; cout<<Maria.nomen<<" "<<Maria.aetasData()<<endl; cout<<Caesar->nomen<<" "<<Caesar->aetasData()<<endl; } </source> <!-- Encapsulation ~~Encapsulation~~Encapsuation is the hiding of information in order to ensure that data structures and operators are used as intended and to make the usage model more obvious to the developer. C++ provides the ability to define classes and functions as its primary encapsulation mechanisms. Within a class, members can be declared as either public, protected, or private in order to explicitly enforce encapsulation. A public member of the class is accessible to any function. A private member is accessible only to functions that are members of that class and to functions and classes explicitly granted access permission by the class ("friends"). A protected member is accessible to members of classes that inherit from the class in addition to the class itself and any friends. The OO principle is that all of the functions (and only the functions) that access the internal representation of a type should be encapsulated within the type definition. C++ supports this (via member functions and friend functions), but does not enforce it: the programmer can declare parts or all of the representation of a type to be public, and is allowed to make public entities that are not part of the representation of the type. Because of this, C++ supports not just OO programming, but other weaker decomposition paradigms, like modular programming.

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