private static CalculatorResult Multiply(double number1, double number2)
{
CalculatorResult result = new CalculatorResult();
result.data = number1 * number2;
return(result);
}
private static CalculatorResult Subtract(double number1, double number2)
{
CalculatorResult result = new CalculatorResult();
result.data = number1 - number1;
return(result);
}
private static CalculatorResult Unknown(double number1, double number2)
{
CalculatorResult result = new CalculatorResult();
result.unknown = false;
return(result);
}
public void Сalculate(CalculatorTask task)
{
Operation operation = Unknown;
switch (task.command)
{
case Command.Add:
operation = Add;
break;
case Command.Subtract:
operation = Subtract;
break;
case Command.Multiply:
operation = Multiply;
break;
case Command.Divide:
operation = Divide;
break;
}
CalculatorResult result = operation(task.number1, task.number2);
Subscribe?.Invoke(task, result);
}
private static CalculatorResult Divide(double number1, double number2)
{
CalculatorResult result = new CalculatorResult();
if (number1 == 0)
{
result.infinity = true;
}
else if (number2 != 0)
{
result.data = number1 / number2;
}
return(result);
}
public static void ShowResult(CalculatorTask task, CalculatorResult result)
{
if (!result.unknown)
{
Console.Write($"{task.number1} {task.symbol} {task.number2} = ");
if (result.infinity)
{
Console.WriteLine("Infinity");
}
else
{
Console.WriteLine(result.data);
}
}
else
{
Console.WriteLine("Unknown operation");
}
}
