public int Calculate()
{
switch (expressionType)
{
case ExpressionType.NUMBER:
return(right);
case ExpressionType.PLUS:
return(left.Calculate() + right);
case ExpressionType.MINUS:
return(left.Calculate() - right);
default:
throw new Exception();
}
}
private void Result_button_Click(object sender, EventArgs e)
{
try
{
ExpressionNode expressionNode = InterpreterClass.GetExpressionTree(Expression_textBox.Text);
Result_label.Text = expressionNode.Calculate().ToString();
}
catch (Exception ex)
{
MessageBox.Show("Error: Неверный формат строки");
}
}
