public string Postfix2Prefix(string expression)
{
if (!CheckPostfix(expression))
{
Steps.Add(new Step("", "Revers"));
return("");
}
Infiks infiks = new Infiks(Steps);
expression = infiks.Postfiks2Infiks(expression);
return(Infiks2Prefiks(expression));
}
private void TextBox_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
{
if (e.Key == Key.Enter)
{
Steps.Clear();
Infiks infiks = new Infiks(Steps);
Prefiks prefiks = new Prefiks(Steps);
Postfiks postfiks = new Postfiks(Steps);
if (Check(Expression.Text.ToString()))
{
if (BaseInfix.IsChecked == true)
{
if (!infiks.CheckInfix(Expression.Text.ToString()))
{
this.ShowMessageAsync("Error", "Incorrect infix structure");
}
else
{
if (GoalInfix.IsChecked == true)
{
Steps.Add(new Step(Expression.Text.ToString(), ""));
this.ShowMessageAsync("Info", "Base and Goal are the same");
}
else if (GoalPostfix.IsChecked == true)
{
postfiks.Infiks2Postfiks(Expression.Text.ToString());
}
else if (GoalPrefix.IsChecked == true)
{
prefiks.Infiks2Prefiks(Expression.Text.ToString());
}
else
{
this.ShowMessageAsync("Error", "Base and Goal error");
}
}
}
if (BasePostfix.IsChecked == true)
{
if (!prefiks.CheckPostfix(Expression.Text.ToString()))
{
this.ShowMessageAsync("Error", "Incorrect postfix structure");
}
else
{
if (GoalInfix.IsChecked == true)
{
infiks.Postfiks2Infiks(Expression.Text.ToString());
}
else if (GoalPostfix.IsChecked == true)
{
Steps.Add(new Step(Expression.Text.ToString(), ""));
this.ShowMessageAsync("Info", "Base and Goal are the same");
}
else if (GoalPrefix.IsChecked == true)
{
prefiks.Postfix2Prefix(Expression.Text.ToString());
}
else
{
this.ShowMessageAsync("Error", "Base and Goal error");
}
}
}
if (BasePrefix.IsChecked == true)
{
if (!prefiks.CheckPrefix(Expression.Text.ToString()))
{
this.ShowMessageAsync("Error", "Incorrect prefix structure");
}
else
{
if (GoalInfix.IsChecked == true)
{
infiks.Prefiks2Infiks(Expression.Text.ToString());
}
else if (GoalPostfix.IsChecked == true)
{
postfiks.Prefisk2Postfix(Expression.Text.ToString());
}
else if (GoalPrefix.IsChecked == true)
{
Steps.Add(new Step(Expression.Text.ToString(), ""));
this.ShowMessageAsync("Info", "Base and Goal are the same");
}
else
{
this.ShowMessageAsync("Error", "Base and Goal error");
}
}
}
}
else
{
this.ShowMessageAsync("Info", "Incorrect arithmetic expression");
}
StepsListView.Items.Refresh();
}
}
