private void Btn6_Click(object sender, EventArgs e)
{
if (HistoryTxtBox.Text.Contains('='))
{
HistoryTxtBox.Clear();
ResultTxtBox.Clear();
}
if (!(HistoryTxtBox.Text.LastOrDefault() == ')'))
{
ResultTxtBox.Text += "6";
}
}
public bool FindResult()
{
try
{
if (HistoryTxtBox.Text.Contains('='))
{
HistoryTxtBox.Clear();
}
char sumbol = HistoryTxtBox.Text.Intersect(SumbolArr).LastOrDefault();
if (HistoryTxtBox.Text.Length == 0 || sumbol == '\0')
{
Result = Convert.ToDouble(ResultTxtBox.Text);
}
if (ResultTxtBox.Text.Length > 0)
{
if (sumbol == '+')
{
Result += Convert.ToDouble(ResultTxtBox.Text);
}
if (sumbol == '-')
{
Result -= Convert.ToDouble(ResultTxtBox.Text);
}
if (sumbol == '*')
{
if (Result == 0)
{
Result = 1;
}
Result *= Convert.ToDouble(ResultTxtBox.Text);
}
if (sumbol == '/')
{
if (Convert.ToDouble(ResultTxtBox.Text) == 0)
{
throw new Exception("Ошибка: Деления на нол!!!");
}
Result /= Convert.ToDouble(ResultTxtBox.Text);
}
return(true);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
ResultTxtBox.Clear();
}
return(false);
}
private void Btn0_Click(object sender, EventArgs e)
{
if (HistoryTxtBox.Text.Contains('='))
{
HistoryTxtBox.Clear();
ResultTxtBox.Clear();
}
if (!(HistoryTxtBox.Text.LastOrDefault() == ')'))
{
if ((!ResultTxtBox.Text.All(p => p == '0')) || (ResultTxtBox.Text.Length == 0))
{
ResultTxtBox.Text += "0";
}
}
}
private void ProtsentBtn_Click(object sender, EventArgs e)
{
try
{
if (ResultTxtBox.Text.Length > 0 && HistoryTxtBox.Text.LastOrDefault() != ')')
{
if (HistoryTxtBox.Text.LastOrDefault() == '=')
{
HistoryTxtBox.Clear();
}
HistoryTxtBox.Text += $"({ResultTxtBox.Text}%)";
ResultTxtBox.Text = (Result * Convert.ToDouble(ResultTxtBox.Text) / 100).ToString();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
ResultTxtBox.Clear();
}
}
private void CBtn_Click(object sender, EventArgs e)
{
ResultTxtBox.Clear();
HistoryTxtBox.Clear();
Result = 0;
}