//  BigInt.h

//  BigInt stores an integer.
//  This version stores only non negative integers.
//  The integers may grow to very large size.  The
//  vector that stores the integer grows to match
//  the size of the number.

//  If BigInt has not been initialized, it prints
//  its value as #UNK.

//  tom bailey  16 feb 00


#ifndef _BIGINT_H
#define _BIGINT_H

#include <iostream>
#include <vector>
using namespace std;


class BigInt {
public:

	BigInt();
	BigInt( long );
	BigInt( const BigInt & );

	BigInt operator+( const BigInt & ) const;
	const BigInt & operator+=( const BigInt & );

	const BigInt & operator=( const BigInt & );

	void print( ostream & ) const;

private:

	bool known;
	vector<short> digit;

};


ostream & operator<<( ostream &, const BigInt & );


#endif
//  Notes:

//  No sign yet, only handles non-negative integers.
//  The value is known as soon as an assignment is made.
//  The value is unknown when the zero-parameters
//  constructor is used.