private void ResultBtn_Click(object sender, EventArgs e)
{
try
{
if (FindResult())
{
if (HistoryTxtBox.Text.LastOrDefault() == ')')
{
HistoryTxtBox.Text += "=";
}
else
{
HistoryTxtBox.Text += ResultTxtBox.Text + "=";
}
ResultTxtBox.Text = Result.ToString();
HistoryListBox.Items.Add(HistoryTxtBox.Text + ResultTxtBox.Text);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
ResultTxtBox.Clear();
}
}
private void CBtn_Click(object sender, EventArgs e)
{
ResultTxtBox.Clear();
HistoryTxtBox.Clear();
Result = 0;
}
private void CEBtn_Click(object sender, EventArgs e)
{
ResultTxtBox.Clear();
}