酒吧管理系统！！有简单基本功能

				//Counter.h
				#ifndef COUNTER_H
				#define COUNTER_H
				
				class Counter
				{
				public:
				    Counter(int);
					virtual~Counter(){};
				    void gettablenumber(int);
				    virtual double counting(double) const=0;;
				    virtual void print() const;
				protected:
					int tablenumber;
				};
				#endif