Do not allow enters/returns in arguments (thanks to Fabio Carretto)
double ConvertTemperature(const double tValue, const unsigned char tSign)
{
	if (tSign=='C')
		return tValue;
	return RoundDouble(ConvertToFahrenheit(tValue),1);
}

double ConvertTemperature(const double tValue, const unsigned char tSign)
{
	if (tSign=='C')
		return tValue;
	return RoundDouble(ConvertToFahrenheit(tValue),1);
}
