c++ 질문입니다.

typedef unsigned short UB2;
typedef char           SCHAR;
 
class CPacketHeader
{
public:
	UB2 msg_type;
	CPacketHeader(UB2 msgType);
	virtual ~CPacketHeader();
 
	virtual void CShowPacket() = 0;
};
 
 
class CLoginAuthReqPacket : public CPacketHeader
{
public:
	CLoginAuthReqPacket(UB2 msgType, SCHAR * dbUser, SCHAR * pw, SCHAR * dbName, SCHAR * pName);
	~CLoginAuthReqPacket();
 
	void CShowPacket();
private:
 
	SCHAR db_user[33];
	SCHAR password[33];
	SCHAR program_name[33];
	SCHAR db_name[33];
 
};
 
class CLoginAuthResPacket : public CPacketHeader
{
public:
	CLoginAuthResPacket(UB2 msgType, UB2 rtnLen, SCHAR * rtnMsg);
	~CLoginAuthResPacket();
 
	void CShowPacket();
private:
 
	UB2 rtn_len;
	SCHAR rtn_msg[257];
 
};

#include "a.hpp"
#include <cstring>
#include <iostream>
 
using std::cout;
using std::endl;
 
CPacketHeader::CPacketHeader(UB2 msgType)
{
	msg_type = msgType;
}
 
// 로그인 요청 생성자
CLoginAuthReqPacket::CLoginAuthReqPacket(UB2 msgType, SCHAR * dbUser, SCHAR * pw, SCHAR * dbName, SCHAR * pName) : CPacketHeader(msgType)
{
	strcpy((char *)db_user, (char *)dbUser);
	strcpy((char *)password, (char *)pw);
	strcpy((char *)db_name, (char *)dbName);
	strcpy((char *)program_name, (char *)pName);
}
 
// 로그인 응답 생성자
CLoginAuthResPacket::CLoginAuthResPacket(UB2 msgType, UB2 rtnLen, SCHAR * rtnMsg) : CPacketHeader(msgType)
{
	rtn_len = rtnLen;
	strcpy((char *)rtn_msg, (char *)rtnMsg);
}
 
void CLoginAuthReqPacket::CShowPacket()
{
	cout << "[LOGIN AUTH REQ PACKET]" << endl;
	cout << "[MSG TYPE] : " << msg_type << endl;
	cout << "[DB USER] : " << db_user << endl;
	cout << "[PASSWORD] : " << password << endl;
	cout << "[PROGRAM NAME] : " << program_name << endl;
	cout << "[DB NAME] : " << db_name << endl;
}
 
 
void CLoginAuthResPacket::CShowPacket()
{
	cout << "[LOGIN AUTH RES PACKET]" << endl;
	cout << "[MSG TYPE] : " << endl;
	cout << "[LOGIN RES MSG]" << endl;
	cout << rtn_msg << endl;
};