Example #1
0
        /// <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;
            }
        }
Example #2
0
        /// <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
            }
        }