#include <iostream>
using namespace std;

#ifndef _BSTRING_H
#define _BSTRING_H

class BString
{
  friend BString operator+(const BString& s1, const BString& s2); // concat

  friend bool operator== (const BString& s1, const BString& s2);
  friend bool operator!= (const BString& s1, const BString& s2);
  friend bool operator< (const BString& s1, const BString& s2);
  friend bool operator> (const BString& s1, const BString& s2);
  friend bool operator<= (const BString& s1, const BString& s2);
  friend bool operator>= (const BString& s1, const BString& s2);

  friend ostream& operator<< (ostream& os, const BString& bs);
  friend istream& operator>> (istream& is, BString& bs);

public:
  BString();			// default constructor, sets empty string
  BString(const char* c);	// conversion from cstring to BString

  BString(const BString& bs);	// copy constructor (for deep copy)
  BString& operator= (const BString& bs);	// assignment
  ~BString();					// destructor -- cleanup!!
  
  BString& operator+= (const BString& bs);	// concatenation

  int GetLength() const;				// accessor

private:
  char* str;		// pointer to the dynamic array of chars
  int size;		// tracks size of string (i.e. how many chars)
			//  allocation will always be size+1 (for '\0')

  void Resize(int newsize);	// increase string allocation to newsize+1
};

#endif