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#ifndef _RADIO_H_
#define _RADIO_H_
#include "GeneralDevice.h"
#include <iostream>
//using std::istream;
using std::ostream;
class Radio : public GeneralDevice
{
//friend ostream &operator<<( ostream&, const Radio& );
public:
Radio();
Radio(char *);
virtual ~Radio();
virtual void operator++(int);
virtual void operator--(int);
virtual void print();
private:
double volume;
};
#endif //_RADIO_H_
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