// Traditional version of calculation, without
// and asynchronous programming
public static void RunPiCalculation()
{
// Setup calculator and data objects
PiCalcAlgorithm calc = new PiCalcAlgorithm();
PiCalcData data = new PiCalcData();
// Run the main loop
MainUILoop(calc, data);
// Report result
Console.WriteLine($"Final value for pi : {data.Pi}");
Console.WriteLine($"Found after {data.Iterations} iterations");
}
// Asynchronous version of calculation
public static async void RunPiCalculationAsync()
{
// Setup calculator and data objects
PiCalcAlgorithm calc = new PiCalcAlgorithm();
PiCalcData data = new PiCalcData();
// This is where the magic happens...
Task<double> task = calc.CalculateAsync(data);
MainUILoopForAsync(data);
double finalPi = await task;
// Report result
Console.WriteLine("Final value for pi : " + finalPi);
Console.WriteLine("Found after " + data.Iterations + " iterations");
}
// Main UI loop for the traditional version
private static void MainUILoop(PiCalcAlgorithm calc, PiCalcData data)
{
// Keep doing this until the user quits.
while (!data.Quit)
{
// Prompt user for input
Console.Write("Enter p (pi value), d (do more iterations), i (iterations) or q (quit) : ");
string userInput = Console.ReadLine();
// Sanity check for input
if (string.IsNullOrEmpty(userInput))
{
continue;
}
// Process user input
if (userInput.Equals("p")) // Pi value
{
double diffPercent = Math.Abs((Math.PI - data.Pi) * 100.0 / Math.PI);
Console.WriteLine($"Current value for pi : {data.Pi} ({diffPercent} % diff.)");
}
else if (userInput.Equals("d")) // Do more iterations
{
Console.Write("Enter number of iterations to do : ");
string iterationsStr = Console.ReadLine();
int iterationsInSlice = 0;
if (Int32.TryParse(iterationsStr, out iterationsInSlice) && iterationsInSlice > 0)
{
double partialPi = calc.Calculate(iterationsInSlice);
Console.WriteLine($"Did {iterationsInSlice} additional iterations");
data.Pi = (data.Pi * data.Iterations + partialPi * iterationsInSlice) / (data.Iterations + iterationsInSlice);
data.Iterations += iterationsInSlice;
}
}
else if (userInput.Equals("i")) // Iterations so far
{
Console.WriteLine($"Iterations so far : {data.Iterations}");
}
else if (userInput.Equals("q")) // Quit
{
data.Quit = true;
}
}
}
