#pragma once class Bill{ private: char* _company_name; char* _serial_number; int _sum; bool _isPaid; public: Bill(); Bill(char* company_name,char* serial_number,int sum,bool isPaid); ~Bill(); Bill(const Bill& bill); char* company_name() const; char* serial_number() const; int sum() const; bool isPaid() const; void company_name(char* company_name); void serial_number(char* serial_number); void sum(int sum); void isPaid(bool check); bool operator==(Bill bill); Bill& operator=(const Bill& bill); };