// Class definition file: cstrlib.h

#ifndef STRING_H

#include <iostream.h>

#include "boolean.h"

// Definition section

const MAX_STRING_SIZE = 21;

class string
{

	public:

	// Class constructor
	
	string();
	string(const char str[MAX_STRING_SIZE]);
	string(const string &str);

	// Function members

	int length();
	char nth_char(int n);
	void append_char(char ch);
	boolean operator == (const string &str);
	boolean operator < (const string &str);
	boolean operator > (const string &str);
	boolean operator <= (const string &str);
	boolean operator >= (const string &str);
	boolean operator != (const string &str);
	string& operator = (const char str[MAX_STRING_SIZE]);
	string& operator = (const string &str);
	friend istream& operator >> (istream &is, string &str);
	friend ostream& operator << (ostream &os, const string &str);

	protected:

	// Data members

	char data[MAX_STRING_SIZE];
		
};

#define STRING_H
#endif