Re: Create a string class as shown below

From:

".rhavin grobert" <clqrq@yahoo.de>

Newsgroups:

comp.lang.c++

Date:

Mon, 27 Oct 2008 08:57:12 -0700 (PDT)

Message-ID:

<1d745e8f-5273-4e96-afcc-e83a80c000a8@t42g2000hsg.googlegroups.com>

On 24 Okt., 15:49, ahd...@yahoo.com wrote:

class string
{ private:
....
public:

      //Constructor
     //overloading constructor

     //Destructor
friend function for accepting input
friend fuction for display output

}

a constructor which will initialize the string as the first line and
size with corresponding string length.

Another overloading constructor which will accept a string and
initialize it and its length to the class

Write a friend function which will read a string for the objext from
the keyboard

just a hint to let you start:

class string
{
private:

  // the lenght of the string
  unsigned int m_nLenght;

  // the pointer to the allocated data
  void* m_pData;

public:

  // Constructor
  string()
    : m_pData(NULL), m_nLenght(0) {};

  // copy constructor
  string(string const& string s)
    : m_nLenght(s.m_nLenght)
  {
    if (m_nLenght)
    {
      m_pData = NULL;
      return;
    }
    m_pData = malloc(m_nLenght);
    ::memcpy(m_pData, s.m_pData, m_nLenght);
  };

  // Destructor
  ~string() {free(m_pData);};
};