private double calculateResult(string sign)
{
double result = 0;
if (sign.Equals("+"))
{
result = mathLib.AddDoubles(number1, number2);
}
if (sign.Equals("-"))
{
result = mathLib.SubDoubles(number1, number2);
}
if (sign.Equals("*"))
{
result = mathLib.MultDoubles(number1, number2);
}
if (sign.Equals("/"))
{
result = mathLib.DivDouble(number1, number2);
}
return(result);
}