/***************************************************************************
 ***   FILE: copy_constr.cpp
 ***   DATE: Jan 18, 2004
 *** AUTHOR: Daniel Dementiev
 ***   GOAL: This program illustrates an initialization of one object using
 ***         another object of the same type if ther is the copy constructor.
 ***************************************************************************/

#include <iostream>
#include <string>

using namespace std;

class TString {
   public:
      TString();
      TString(char *s);
      TString(const TString &s);
      void Print();
      void Set(char *s);
   private:
      char *str;
      int   size;
      int   length;
};

TString::TString()
{
   str = new char[32];
   size = 32;
   length = 0;
   str[0] = 0;
}

TString::TString(char *s)
{
   length = strlen(s);
   size = length + 1;
   str = new char[size];
   strcpy(str, s);
}

TString::TString(const TString &s)
{
   size = s.size;
   length = s.length;
   str = new char[size];
   strcpy(str, s.str);
}


void TString::Print()
{
   cout<<str<<endl;
}

void TString::Set(char *s)
{
   strcpy(str, s);
}


void main()
{
   TString a("Hello, world!");
   TString b = a;

   cout<<"Initially variables are: \n";
   cout<<"a = ";
   a.Print();
   cout<<"b = ";
   b.Print();

   cout<<"\nAfter executing a.Set(\"Bye, world.\") they are:\n";
   a.Set("Bye, world.");
   cout<<"a = ";
   a.Print();
   cout<<"b = ";
   b.Print();
}

/***************************************************************************/