/************************************************************************************************************************** __// FACTORY DESIGN PATTERN //__ Basically here we have created a factory class method which is resposible in creation of class object as per user's interest. Also we have created a Interface class to maintain polymorphic relationship. This pattern wildly used when run time object creation is required. That's why this pattern is called virtual constructor. TESTINGS: SAGA@GASA:~/Practice/design_patterns/design_pattern_cpp$ c++ factory_design_pattern.cpp -o factory SAGA@GASA:~/Practice/design_patterns/design_pattern_cpp$ ./factory Please enter type of the class: type class 1 Machine 2 Assembly 3 HighLevel Enter type 0 to exit the application 1 Type: Machine Language Human Readability: False 2 Type: Assembly Language Human Readability: True 3 Type: HighLevel Language Human Readability: True 4 Unknwon type provided 0 *****************************************************************************************************************************/ #include using namespace std; class ILanguage { private: bool _isHumanReadable; string _type; public: ILanguage(bool isHR,string type):_isHumanReadable(isHR),_type(type) {} string type() { return _type; } bool isHumanReadable() { return _isHumanReadable; } }; class MachineLanguage:public ILanguage { public: MachineLanguage():ILanguage(false,"Machine Language") {} }; class AssemblyLanguage:public ILanguage { public: AssemblyLanguage():ILanguage(true,"Assembly Language") {} }; class HighLevelLanguage:public ILanguage { public: HighLevelLanguage():ILanguage(true,"HighLevel Language") {} }; class LanguageFactory { public: static ILanguage* createLanguageInstance(int type) { ILanguage * intPtr = NULL; switch(type) { case 1: intPtr = new MachineLanguage(); break; case 2: intPtr = new AssemblyLanguage(); break; case 3: intPtr = new HighLevelLanguage(); break; default: cout<<"Unknwon type provided"<>type; if(type == 0) { break; } ip = LanguageFactory::createLanguageInstance(type); if(ip) { cout<<"Type: "<type()<isHumanReadable()==false)?"False":"True")<

Factory_design_pattern.cpp