char *getString()
{
     int nSize = 2;
     char *str;
     str = (char *) malloc (nSize * sizeof(*str));
     str[1] = 0;

     int nIndex = 0;
     do
     {
         str[nIndex] = getch();
         printf("%c", str[nIndex]);

         nIndex++;

         if (nIndex == nSize)
         {
              char *strTmp;
              nSize += 1;
              strTmp = (char *) realloc (str, nSize * sizeof(*str));
              str = strTmp;
              str[nSize - 1] = 0;
         }
      }while (str[nIndex - 1] != 13);

      char *strTmp;
      strTmp = (char *) realloc (str, (nSize - 2) * sizeof(*str));
      str = strTmp;
      str[nSize - 2] = 0;

      return str;
}