/// <summary>
/// cette méthode calcule la factorielle d'un nombre
/// </summary>
/// <param name="pNumber">paramètre nombre entier positif obligatoire</param>
/// <returns>entier avec le résultat de la factorielle</returns>
public BigInteger Calculate(int pNumber)
{
if (pNumber < 0)
{
throw new ArgumentOutOfRangeException();
}
Initializing?.Invoke(this, new EventArgs());
Stopwatch myWatch = new Stopwatch();
myWatch.Start();
// exemple while
BigInteger result = 1;
{
int decrement = pNumber;
while (decrement > 1)
{
result = result * decrement;
//pNumber = pNumber - 1; // solution étendue
decrement -= 1; // solution abrégée
//pNumber--; // solution courte postfixée
//--pNumber; // solution courte prefixée
}
}
//exemple for
result = 1;
for (int decrement = pNumber;
decrement > 1;
decrement--)
{
if (this.CancelCalculate)
{
myWatch.Stop();
if (Cancelled != null)
{
CancelledEventArgs CEA = new CancelledEventArgs(pNumber, myWatch.Elapsed);
Cancelled(this, CEA);
}
return(0);
}
if (Progressing != null)
{
ProgressingEventArgs PEA = new ProgressingEventArgs(pNumber, pNumber - decrement + 1);
OnProgressing(PEA);
}
Thread.Sleep(20);
result = result * decrement;
}
myWatch.Stop();
if (Completed != null)
{
CompletedEventArgs CEA = new CompletedEventArgs(pNumber, result, myWatch.Elapsed);
OnCompleted(CEA);
}
return(result);
}
public BigInteger CalculateAsync(int pNumber)
{
if (pNumber < 0)
{
throw new ArgumentOutOfRangeException();
}
Initializing?.Invoke(this, new EventArgs());
Stopwatch myWatch = new Stopwatch();
myWatch.Start();
// exemple while
BigInteger result = 1;
//exemple for
result = 1;
for (int decrement = pNumber;
decrement > 1;
decrement--)
{
if (Progressing != null)
{
ProgressingEventArgs PEA = new ProgressingEventArgs(pNumber, pNumber - decrement + 1);
OnProgressing(PEA);
}
Thread.Sleep(50);
result = result * decrement;
}
myWatch.Stop();
if (Completed != null)
{
CompletedEventArgs CEA = new CompletedEventArgs(pNumber, result, myWatch.Elapsed);
OnCompleted(CEA);
}
return(result);
}
protected virtual void OnCompleted(CompletedEventArgs CEA)
{
Completed(this, CEA);
}
