/// <summary>
/// generates postfix expression for infix expression currently in infix box
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void GenerateButton_Click(object sender, EventArgs e)
{
PostFix pf = new PostFix( );
string resultingPostfix;
string selectedInfix = InfixBox.Text;
if (!selectedInfix.Equals(null))
{
pf.InfixExpression = selectedInfix;
resultingPostfix = pf.PostfixExpression;
InfixBox.Text = selectedInfix;
PostFixBox.Text = resultingPostfix;
}
}
/// <summary>
/// when new infix expression selected in ListBox, generate postfix expression
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void infixListBox_SelectedIndexChanged(object sender, EventArgs e)
{
PostFix pf = new PostFix( ); //create new postfix object
string resultingPostfix; //holds postfix string
string selectedInfix = infixListBox.GetItemText(infixListBox.SelectedItem); //holds infix expression
//if infix expression is not null, generate postfix
if (!selectedInfix.Equals(null))
{
pf.InfixExpression = selectedInfix; //passes infix to pf object
resultingPostfix = pf.PostfixExpression; //stores created postfix expression
InfixBox.Text = selectedInfix; //displays infix expression
PostFixBox.Text = resultingPostfix; //displays postfix expression
}
}