#include <iostream>
#include <cstring>
#include "flex.h"
using namespace std;

ostream& operator<< (ostream& s, const Flex& f)
{
   s << '*' << f.str << '*';
   return s;
}

Flex::Flex()
{
   size = 1;			// size doesn't include null char
   str = new char[size+1];	// allocate +1 for null char
   strcpy(str," ");
}

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

Flex::~Flex()
// not specifically required by the specs, but a good idea to have this
{
   delete [] str;
}

void Flex::cat(const Flex & f)
// this function can also be made easier through the use of the
// strcat library function for concatenating strings.
// dyanamic reallocation still required, though.
{
   int newsize = size + strlen(f.str);

   char * temp = new char[newsize+1];	// allocate with room for '\0'
   strcpy(temp,str);			// copy this string to temp
   for (int i = 0; i <= f.size; i++)
	temp[size+i] = f.str[i];	// concatenate f.str to temp,
					//   including '\0'

   delete [] str;			// delete old array
   str = temp;				// set str to new one
   size = newsize;			// update size tracker
}