Това го слагаш в .h
#pragma once
#ifndef _AStr_H
#define _AStr_H
#include <iostream>
class AStr
{
private:
	char n[20];
public:
	AStr(char[] = NULL);
	AStr(const AStr&);
	AStr& operator=(const AStr&);
	~AStr();

	virtual std::ostream& insert(std::ostream&) = 0;
};
std::ostream& operator<< (std::ostream&, const AStr &);

#endif

това го слагаш в .cpp
#include "AStr.h"
#include <iostream>

AStr::AStr(char c[])
{
	if (n != NULL)
		strcpy_s(this->n, strlen(c) + 1, c);
}
 AStr::AStr(const AStr& rhs)
{
	 if (rhs.n != NULL)
	 {
		 strcpy_s(n, strlen(rhs.n) + 1, rhs.n);
	 }

}
AStr& AStr :: operator=(const AStr&rhs)
{
	if (this != &rhs) {
		if (rhs.n != NULL)
		{
			strcpy_s(n, strlen(rhs.n) + 1, rhs.n);
		}
	}
	return *this;
}

AStr::~AStr()
{
}

std::ostream& AStr::insert(std::ostream& rhs)
{
	return rhs << n << std::endl;
}

std::ostream& operator << (std::ostream& lhs, AStr& rhs) {
	return rhs.insert(lhs);
}