Третья группа

Задания

Streams

Наследуясь от класса OutputStream реализовать Иерархию классов FileOutputStream, StringOutputStream, ConsoleOutputStream имеющие соответствующую функциональность.

struct OutputStream
{
    virtual void print( std::string const& s ) = 0;

    virtual void print( int t ) 
    {
        char buff[16] = {};
        sprintf(buff, "%d", t);
        print(buff);
    }

    virtual void print( double t ) 
    {
        char buff[16] = {};
        sprintf(buff, "%f", t);
        print(buff);
    }

    virtual void flush() = 0;

    virtual ~OutputStream() {}
};

Rationals

// Rational.h

class Rational {

    Rational & operator+=( Rational const& b );

    Rational & operator-=( Rational const& b );

    Rational & operator/=( Rational const& b );

    Rational & operator*=( Rational const& b );

    Rational operator-() const;

    double to_double() const;

    int nom();
    int den();

};

ostream & operator<<(ostream & os, Rational const& r);
istream & operator>>(istream & is, Rational & r);

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

bool operator==( Rational const& a, Rational const& b );
bool operator!=( Rational const& a, Rational const& b );
bool operator<( Rational const& a, Rational const& b );
bool operator<=( Rational const& a, Rational const& b );
bool operator>( Rational const& a, Rational const& b );
bool operator>=( Rational const& a, Rational const& b );
~                                                                

Smart-Pointers

scoped_ptr: http://www.boost.org/doc/libs/1_52_0/libs/smart_ptr/scoped_ptr.htm

shared_ptr: http://www.boost.org/doc/libs/1_52_0/libs/smart_ptr/shared_ptr.htm

Array/Bool-Array/Stack

template <class T, size_t Size>

   struct Array

{

   T &      operator[]( size_t i );
   T const& operator[]( size_t i ) const;

   size_t  size() const;
   void resize( size_t size );
   

};

template < class T, size_t Size, template < class, size_t > class Storage >

   struct Stack

{

   T const& top() const;
   T &      top();

   void push(T const& t);

   void pop();

};