INT ToLowerChar(INT c)
{
	return c ^ ' ';
}


BOOLEAN IsUpper(INT c)
{
	CHAR Letters[] = { "QWERTYUIOPASDFGHJKLÇZXCVBNM" };
	for (auto &l : Letters)
	{
		if (l == c)
		{
			return TRUE;
		}
	}

	return FALSE;
}

BOOLEAN IsLower(INT c)
{
	CHAR Letters[] = { "qwertyuiopasdfghjklçzxcvbnm" };
	for (auto &l : Letters)
	{
		if (l == c)
		{
			return TRUE;
		}
	}

	return FALSE;
}

BOOLEAN IsChar(INT c)
{
	return IsLower(c) || IsUpper(c);
}

CHAR* ToLowerString(CHAR *str)
{
	INT size = strlen(str);

	for (INT i =0; i < size; i++)
	{
		if(IsUpper(str[i]))
			str[i] = ToLowerChar(str[i]);
	}

	return str;
}