February 16, 2017 How to use D-language polymorphism? | ||||
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I have the following code in c++ using polymorphism how would I convert D-language polymorphism? #include <cstdlib> #include <iostream> class Mamifero { protected: int idade; public: Mamifero(){} ~Mamifero(){} virtual void somMamifero() const { std::cout<<"\n\tSom de mamifero.\n"; } }; class Boi: public Mamifero { public: void somMamifero() const { std::cout<<"\n\tMuu ..! Muu..!!\n"; } }; class Gato: public Mamifero { public: void somMamifero() const { std::cout<<"\n\tMiAu ..! MiAu..!!\n"; } }; class Porco: public Mamifero { public: void somMamifero() const { std::cout<<"\n\tOinc ..! Oinc..!!\n"; } }; class Cachorro: public Mamifero { public: void somMamifero() const { std::cout<<"\n\tAu ..! Au..!!\n"; } }; int main() { Mamifero* mamPtr; int op; while(op != 5) { std::cout<<"\n\t(1) Boi" <<"\n\t(2) Gato" <<"\n\t(3) Porco" <<"\n\t(4) Cachorro" <<"\n\t(5) Sair" <<"\n\tDigite: "; std::cin>>op; switch(op) { case 1:{ mamPtr = new Boi(); mamPtr->somMamifero(); break; } case 2:{ mamPtr = new Gato(); mamPtr->somMamifero(); break; } case 3:{ mamPtr = new Porco(); mamPtr->somMamifero(); break; } case 4:{ mamPtr = new Cachorro(); mamPtr->somMamifero(); break; } case 5:{ std::cout<<"\n\tGood Bye\n\n"; exit(0); break; } default: std::cout<<"\n\tOpção Inválida ..!!!\n"; } } } |
February 16, 2017 Re: How to use D-language polymorphism? | ||||
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Posted in reply to Jean Cesar | On 02/16/2017 11:09 AM, Jean Cesar wrote: > I have the following code in c++ using polymorphism how would I convert > D-language polymorphism? import std.stdio; class Mamifero { int idade; void somMamifero() { writeln("\n\tSom de mamifero."); } } class Boi: Mamifero { override void somMamifero() const { writeln("\n\tMuu ..! Muu..!!"); } } class Gato: Mamifero { override void somMamifero() const { writeln("\n\tMiAu ..! MiAu..!!"); } } class Porco: Mamifero { override void somMamifero() const { writeln("\n\tOinc ..! Oinc..!!"); } } class Cachorro: Mamifero { override void somMamifero() const { writeln("\n\tAu ..! Au..!!"); } } void main() { Mamifero mamPtr; int op; while(op != 5) { write("\n\t(1) Boi" ~ "\n\t(2) Gato" ~ "\n\t(3) Porco" ~ "\n\t(4) Cachorro" ~ "\n\t(5) Sair" ~ "\n\tDigite: "); readf(" %s", &op); switch(op) { case 1:{ mamPtr = new Boi(); mamPtr.somMamifero(); break; } case 2:{ mamPtr = new Gato(); mamPtr.somMamifero(); break; } case 3:{ mamPtr = new Porco(); mamPtr.somMamifero(); break; } case 4:{ mamPtr = new Cachorro(); mamPtr.somMamifero(); break; } case 5:{ writeln("\n\tGood Bye"); return; } default: writeln("\n\tOpção Inválida ..!!!"); } } } In D you can have interfaces as well: interface Mamifero { void somMamifero(); } Ali |
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