static void Main(string[] args)
{
Calculator c = new Calculator();
// Calculator c2 = new Calculator();
// Console.WriteLine(Math.Round(c2.Tan(20), 4));
double n1 = 0, n2;
string again = "";
bool keep = true;
do
{
do
{
keep = true;
try
{
Console.WriteLine("This is a Calculator, enter number, action, number ");
Console.WriteLine("Available Actions : ");
Console.WriteLine("+ - * / % pow sqrt sine cos tan ");
n1 = double.Parse(Console.ReadLine());
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
keep = false;
}
} while (keep == false);
string action = (Console.ReadLine());
if ((action.ToUpper() != "SQRT") &&
(action.ToUpper() != "SINE") &&
(action.ToUpper() != "COS") &&
(action.ToUpper() != "TAN"))
{
n2 = int.Parse(Console.ReadLine());
}
else
{
n2 = 0;
}
if (action == "+")
{
Console.WriteLine("Answer is " + c.Add(n1, n2));
}
else if (action == "-")
{
Console.WriteLine(c.Sub(n1, n2));
}
else if (action == "*")
{
Console.WriteLine(c.Mul(n1, n2));
}
else if (action == "/")
{
Console.WriteLine(c.Div(n1, n2));
}
else if (action == "%")
{
Console.WriteLine(c.Mod(n1, n2));
}
else if (action.ToUpper() == "POW")
{
Console.WriteLine(c.Power(n1, n2));
}
else if (action.ToUpper() == "SQRT")
{
Console.WriteLine(c.Sqrt(n1));
}
else if (action.ToUpper() == "SINE")
{
Console.WriteLine(c.Sine(n1));
}
else if (action.ToUpper() == "COS")
{
Console.WriteLine(c.Cos(n1));
}
else if (action.ToUpper() == "TAN")
{
Console.WriteLine(c.Tan(n1));
}
else
{
Console.WriteLine("Invalid Entry");
}
Console.WriteLine("Continue, Yes or No? ");
again = Console.ReadLine();
} while (again.ToUpper() == "YES");
}
