// starts a call to fibonacci and captures start/end times
TimeData StartFibonacci(int n)
{
// create a TimeData object to store start/end times
var result = new TimeData();
AppendText($"Calculating Fibonacci({n})");
result.StartTime = DateTime.Now;
long fibonacciValue = Fibonacci(n);
result.EndTime = DateTime.Now;
AppendText($"Fibonacci({n}) = {fibonacciValue}");
double minutes =
(result.EndTime - result.StartTime).TotalMinutes;
AppendText($"Calculation time = {minutes:F6} minutes\r\n");
return(result);
}
//Starts a call to fibonacci and captures start and end times
TimeData StartFibonacci(int n)
{
//Create a TiemData object to store start and end times.
var result = new TimeData();
AppendText($"Calculating Fibonacci: ({n})");
result.StartTime = DateTime.Now;
long fibonacciValue = Fibonacci(n); //calling the fibonacci method on the n fibonacci # and storing result on fibnacciValue
result.EndTime = DateTime.Now;
AppendText($"Fibonacci: ({n}) = " + fibonacciValue);
double minutes =
(result.EndTime - result.StartTime).TotalMinutes;
AppendText($"Calculation time = {minutes:F6} minutes\r\n");
return(result);
}
} // end method startButton_Click
// starts a call to fibonacci and captures start/end times
TimeData StartFibonacci(int n)
{
// create a ThreadData object to store start/end times
TimeData result = new TimeData();
AppendText(String.Format("Calculating Fibonacci({0})", n));
result.StartTime = DateTime.Now; // time before calculation
long fibonacciValue = Fibonacci(n);
result.EndTime = DateTime.Now; // time after calculation
AppendText(String.Format("Fibonacci({0}) = {1}",
n, fibonacciValue));
AppendText(String.Format(
"Calculation time = {0:F6} minutes\r\n",
result.EndTime.Subtract(
result.StartTime).TotalMilliseconds / 60000.0));
return(result);
} // end method StartFibonacci
// start asynchronous calls to Fibonacci
private async void startButton_Click(object sender, EventArgs e)
{
try
{
int fib = int.Parse(txtInput.Text); //converts user input into an int
int fibPlusOne = fib + 1; //fibonicci (x + 1)
int fibPlusTwo = fib + 2; // fibonicci (x + 2)
//validate input is between 1-100
if (fib < 1 || fib > 100)
{
MessageBox.Show("Number must be between 1-100!");
txtInput.Clear();
}
else
{
outputTextBox.Text =
$"Starting Task to calculate Fibonacci({fib})\r\n";
// create Task to perform Fibonacci(user input) calculation in a thread
Task <TimeData> task1 = Task.Run(() => StartFibonacci(fib));
outputTextBox.AppendText(
$"Starting Task to calculate Fibonacci({fibPlusOne})\r\n");
// create Task to perform Fibonacci(input plus 1) calculation in a thread
Task <TimeData> task2 = Task.Run(() => StartFibonacci(fibPlusOne));
outputTextBox.AppendText(
$"Starting Task to calculate Fibonacci({fibPlusTwo})\r\n");
// create Task to perform Fibonacci(input plus 1) calculation in a thread
Task <TimeData> task3 = Task.Run(() => StartFibonacci(fibPlusTwo));
var tasks = new Task[]
{
task1, task2, task3
};
await Task.WhenAll(tasks); // wait for all to complete
// determine time that first thread started
DateTime startTime =
(task1.Result.StartTime < task2.Result.StartTime && task2.Result.StartTime < task3.Result.StartTime) ?
task1.Result.StartTime : task3.Result.StartTime;
// determine time that last thread ended
DateTime endTime =
(task1.Result.EndTime > task2.Result.EndTime && task2.Result.EndTime > task3.Result.EndTime) ?
task1.Result.EndTime : task3.Result.EndTime;
// display total time for calculations
double totalMinutes = (endTime - startTime).TotalMinutes;
outputTextBox.AppendText(
$"Total calculation time = {totalMinutes:F6} minutes\r\n");
}
}
catch (FormatException) //exception handling if the user enters letters
{
MessageBox.Show("Numbers only please!");
txtInput.Clear();
}
// starts a call to fibonacci and captures start/end times
TimeData StartFibonacci(int n)
{
// create a TimeData object to store start/end times
var result = new TimeData();
AppendText($"Calculating Fibonacci({n})");
result.StartTime = DateTime.Now;
long fibonacciValue = Fibonacci(n);
result.EndTime = DateTime.Now;
double minutes =
(result.EndTime - result.StartTime).TotalMinutes;
AppendText($"Fibonacci{n}) = {fibonacciValue} \r\n Calculation time = {minutes:F6} minutes\r\n");
return(result);
}
}