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#ifndef __WIDGTHS_H__ #define __WIDGTHS_H__ #include <iostream> using namespace std; class aWidghtA { public: virtual void print(void)=0; }; class WidghtA1:public aWidghtA { public: virtual void print(void) { cout<<"WidghtA1"<<endl; } }; class WidghtA2:public aWidghtA { public: virtual void print(void) { cout<<"WidghtA2"<<endl; } }; class aWidghtB { public: virtual void print(void)=0; }; class WidghtB1:public aWidghtB { public: virtual void print(void) { cout<<"WidghtB1"<<endl; } }; class WidghtB2:public aWidghtB { public: virtual void print(void) { cout<<"WidghtB2"<<endl; } }; #endif