public static List <BisectionResultRow> ComputeList(BisectionResultRow InitialRow)
{
//initiialize
BisectionResultRow Row = InitialRow;
List <BisectionResultRow> List = new List <BisectionResultRow>();
//loop until exceed epsillon
while (!Row.ISAccurateEnough)
{
List.Add(Row);
Row = Row.NextIteration();
}
return(List);
}
private void Button_EvaluateExpression_Click(object sender, RoutedEventArgs e)
{
try {
Expr expression = Infix.ParseOrThrow(TextBox_ExpressionInput.Text);
Symbol symbol = Symbol.NewSymbol(TextBox_InputSymbol.Text);
var result = new BisectionResultRow(symbol, expression)
{
A = Double.Parse(TextBox_InputA.Text),
B = Double.Parse(TextBox_InputB.Text),
Epsillon = Double.Parse(TextBox_InputEpsilon.Text)
};
var results = BisectionResultRow.ComputeList(result);
this.ListView_Solution.ItemsSource = results;
UIHelper.ResizeListViewColumnsToContent(this.ListView_Solution, null);
var lastResult = results.Last();
int decimalPlaces = UIHelper.CountDigitsAfterDecimal(TextBox_InputEpsilon.Text);
this.FC_Aproximation.Formula = lastResult.B.ToString();
this.FC_AproximationRounded.Formula = Math.Round(lastResult.B, decimalPlaces).ToString();
this.FC_AproximationChopped.Formula = UIHelper.TruncateDecimal((decimal)lastResult.B, decimalPlaces).ToString();
SnackBarNotif.MessageQueue.Enqueue(
UIHelper.NewSnackbarMessage(
PackIconKind.KeyboardVariant,
"Success! Check solution and results!",
Colors.DarkGreen,
0.5
)
);
}
catch {
//show error message
SnackBarNotif.MessageQueue.Enqueue(
UIHelper.NewSnackbarMessage(
PackIconKind.KeyboardVariant,
"Invalid Input! Function Input (Value to Aprox.) syntax is invalid!",
Colors.HotPink,
0.5
)
);
}
}
public BisectionResultRow NextIteration()
{
BisectionResultRow Next = new BisectionResultRow(this.Symbol, this.FunctionExpression)
{
Iteration = this.Iteration + 1,
Epsillon = this.Epsillon
};
if (IsCPositive)
{
switch (GetPositiveSymbol())
{
case FormulaSymbols.A:
Next.A = this.C;
Next.B = this.B;
break;
case FormulaSymbols.B:
Next.A = this.A;
Next.B = this.C;
break;
}
}
else
{
switch (GetNegativeSymbol())
{
case FormulaSymbols.A:
Next.A = this.C;
Next.B = this.B;
break;
case FormulaSymbols.B:
Next.A = this.A;
Next.B = this.C;
break;
}
}
return(Next);
}
