INTL.h

#include <stdio.h>
#include <string.h>
#include <iostream.h>
#include <sstream.h>

#define len 4

namespace intl
{
    const int max_size = 1028;
    template <class D>
        D readln();
    template <class D>
        void writeln( D data );

    struct INTL
    {
        int     osn;
        int     digits[max_size];
        int     size;
        bool    negative;

        INTL();
        INTL( string number );
        INTL( long number );

        void    setmemory( string number );
        int     getlenght();
        void    input();
        void    output();
        void    Shift( int pos, int digit );
    };

    string  int2str( long number );
    long    str2int( string number );
    INTL    int2intl( long number );
    long    intl2int( INTL ln );

    namespace operators
    {
        void operator << ( const ostream &, INTL &z );
        void operator >> ( const istream &, INTL &z );

        INTL operator + ( const INTL &a, const INTL &b );
        INTL operator - ( const INTL &a, const INTL &b );
        INTL operator * ( const INTL &a, const INTL &b );
        INTL operator / ( const INTL &a, const INTL &b );
        INTL operator % ( const INTL &a, const INTL &b );

        void operator ++ ( INTL &a );
        void operator += ( INTL &a, const INTL &b );
        void operator -- ( INTL &a );
        void operator -= ( INTL &a, const INTL &b );
        void operator *= ( INTL &a, const INTL &b );
        void operator /= ( INTL &a, const INTL &b );
        void operator %= ( INTL &a, const INTL &b );

        bool operator < (const INTL &a, const INTL &b);
        bool operator > (const INTL &a, const INTL &b);
        bool operator <= ( const INTL &a, const INTL &b );
        bool operator >= ( const INTL &a, const INTL &b );
        bool operator == ( const INTL &a, const INTL &b );
    }

    INTL pow( const INTL &a, const int &N );
    INTL sqrt( INTL rslt );
    INTL factorial( INTL n );
}