private void Cbtn_Click(object sender, EventArgs e)
{
if (num1 == 0 && Screentxt.TextLength > 0)
{
num1 = 0; Screentxt.Clear();
}
else if (num1 > 0 && Screentxt.TextLength > 0)
{
Screentxt.Clear();
}
}
private void DELbtn_Click(object sender, EventArgs e)
{
int lenght = Screentxt.TextLength - 1;
string text = Screentxt.Text;
Screentxt.Clear();
for (int i = 0; i < lenght; i++)
{
Screentxt.Text = Screentxt.Text + text[i];
}
}
private void Dotbtn_Click(object sender, EventArgs e)
{
if ((Screentxt.Text == "0") || (isOperationPerformed))
{
Screentxt.Clear();
}
isOperationPerformed = false;
Button button = (Button)sender;
if (button.Text == ".")
{
if (!Screentxt.Text.Contains("."))
{
Screentxt.Text = Screentxt.Text + button.Text;
}
}
else
{
Screentxt.Text = Screentxt.Text + button.Text;
}
}