public double Subtract()
{
var value = FirstNumber - SecondNumber;
ResultsCache.Remember(value);
return(value);
}
public double Multiply()
{
var value = FirstNumber * SecondNumber;
ResultsCache.Remember(value);
return(value);
}
public double Add()
{
var value = FirstNumber + SecondNumber;
ResultsCache.Remember(value);
return(value);
}
public static void RunMemento()
{
var simpleCalc = new SimpleCalculator();
simpleCalc.FirstNumber = 20;
simpleCalc.SecondNumber = 10;
Console.WriteLine("Add: " + simpleCalc.Add());
Console.WriteLine("Subtract: " + simpleCalc.Subtract());
Console.WriteLine("Multiply: " + simpleCalc.Multiply());
Console.WriteLine("Manual Divide: " + ResultsCache.GetCachedResult(0) / ResultsCache.GetCachedResult(2));
}
public double Divide()
{
if (Math.Abs(SecondNumber) <= 0.0)
{
ResultsCache.Remember(double.NaN);
return(double.NaN);
}
var value = FirstNumber / SecondNumber;
ResultsCache.Remember(value);
return(value);
}
