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| /* | |
| * Example DriverPg C++ | |
| * @package main | |
| * @author @jeffotoni | |
| * @size 10/09/2018 | |
| */ | |
| #include <iostream> | |
| // ex: c++ | |
| class DriverPg { | |
| private: | |
| // este objeto sera nossa instancia estatica | |
| static DriverPg* instance; | |
| // Construtor da nossa instancia | |
| DriverPg(); | |
| public: | |
| int port; | |
| // Metodo static public | |
| static DriverPg* Connect(); | |
| }; | |
| // Null, porque a instancia ira iniciar conforme for chamada. | |
| DriverPg* DriverPg::instance = 0; | |
| // nosso método | |
| DriverPg* DriverPg::Connect() { | |
| if (instance == 0) { | |
| instance = new DriverPg(); | |
| instance->port = 5432; | |
| } | |
| return instance; | |
| } | |
| DriverPg::DriverPg() | |
| {} | |
| int main() { | |
| //new DriverPg(); // nao irá funcionar | |
| DriverPg* s = DriverPg::Connect(); // Ok | |
| DriverPg* r = DriverPg::Connect(); | |
| int p = DriverPg::Connect()->port; | |
| // objetos retornados | |
| std::cout << s << std::endl; | |
| std::cout << r << std::endl; | |
| std::cout << p << std::endl; | |
| } |
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