#ifndef __INTEGER
#define __INTEGER

// Integer class interface: support operations for large integers
//
// CONSTRUCTION: with (a) no initializer or (b) an int,
//     (c) or a String, or (d) another Integer
//
// ******************PUBLIC OPERATIONS*********************
// =, +=, -=, /=, *=      --> Usual assignment
// +, -, *, /             --> Usual binary arithmetic
// <, <=, >, >=, ==, !=   --> Usual relational and equality
// << and >>              --> Input and output
// String ToString( )     --> Return String equivalent
// int IntValue( )        --> Return int equivalent

// int * version

#include <iostream.h>
#include "String.h"

class Integer
{
  public:
        // Constructors
    Integer( int InitialValue = 0 );
    Integer( const String & InitialValue );
    Integer( const Integer & Rhs ); // Default is not OK

        // Destructor (default is NOT OK)
    ~Integer( ) { delete [ ] TheDigits; }

        // Assignment Operators
        // Default operator= is NOT OK
    const Integer & operator= ( const Integer & Rhs );
    const Integer & operator+=( const Integer & Rhs );
    const Integer & operator-=( const Integer & Rhs );
    const Integer & operator/=( const Integer & Rhs );
    const Integer & operator*=( const Integer & Rhs );

        // Mathematical Binary Operators
    Integer operator+( const Integer & Rhs ) const;
    Integer operator-( const Integer & Rhs ) const;
    Integer operator/( const Integer & Rhs ) const;
    Integer operator*( const Integer & Rhs ) const;

        // Relational and Equality Operators
    int operator< ( const Integer & Rhs ) const;
    int operator<=( const Integer & Rhs ) const;
    int operator> ( const Integer & Rhs ) const;
    int operator>=( const Integer & Rhs ) const;
    int operator==( const Integer & Rhs ) const;
    int operator!=( const Integer & Rhs ) const;

        // Unary Operators
    const Integer & operator++( );            // Prefix
    Integer operator++( int );                // Postfix
    const Integer & operator--( );            // Prefix
    Integer operator--( int );                // Postfix
    const Integer & operator+( ) const;
    Integer operator-( ) const;
    int operator!( ) const;

        // Member Functions
    String ToString ( ) const;
    int IntValue( ) const;

        // Friends of the class: privacy is waived for these
    friend ostream & operator<<
            ( ostream & Out, const Integer & Value );
    friend istream & operator>>
            ( istream & In,  Integer & Value );
  private:
    int *       TheDigits;
    int         MaxDigits;
    int         SignBit;
    int         NumDigits;
};
#endif