private void AllBtn_Click(object sender, EventArgs e)
{
Button btn = sender as Button;
// MessageBox.Show(btn.Name); Testing if the buttons have proper name and are used as senders properly
switch (btn.Name)
{
case "BtnDel":
if (Display.Text.Length > 0)
{
Display.Text = Display.Text.Substring(0, Display.Text.Length - 1); //Will delete one character from display
}
break;
case "BtnC": //Will clear op and display C = clear
op = "";
Display.ResetText();
Display2.ResetText();
break;
case "BtnCE": //Will clear display CE = Clear Entry
Display.ResetText();
break;
case "BtnPoint": //Decimal
if (!Display.Text.Contains(".")) //case there already is
{
Display.Text += ".";
}
break;
case "BtnNegate":
if (Display.Text.Length > 0)
{
if (!Display.Text.Contains("-")) //if it's positive it will a minus at end
{
Display.Text = "-" + Display.Text;
}
else if (Display.Text.Contains("-")) //if it's negative will remove the minus
{
Display.Text = Display.Text.Substring(1, Display.Text.Length - 1);
}
}
break;
default:
if (op == "=")
{
op = "";
Display.ResetText();
}
Display.Text += btn.Text; // adds stuff on display
break;
}
}
private void Operation_Click(object sender, EventArgs e)
{
Button opr = sender as Button;
switch (opr.Text)
{
case "+":
if (Display.Text.Length > 0)
{
if (op == "" || op == "=")
{
op = "+";
prevop = op;
preveq = Display.Text;
Display2.Text = preveq + op;
Display.ResetText();
}
}
else
{
op = "+";
multi_eq(); //this will do the actual calculations
}
break;
case "-":
if (Display.Text.Length > 0)
{
if (op == "" || op == "=")
{
op = "-";
prevop = op;
preveq = Display.Text;
Display2.Text = preveq + op;
Display.ResetText();
}
}
else
{
op = "-";
multi_eq();
}
break;
case "÷":
if (Display.Text.Length > 0)
{
if (op == "" || op == "=")
{
op = "÷";
prevop = op;
preveq = Display.Text;
Display2.Text = preveq + op;
Display.ResetText();
}
}
else
{
op = "";
multi_eq();
}
break;
case "x":
if (Display.Text.Length > 0)
{
if (op == "" || op == "=")
{
op = "x";
prevop = op;
preveq = Display.Text;
Display2.Text = preveq + op;
Display.ResetText();
}
}
else
{
op = "x";
multi_eq();
}
break;
case "=":
if (Display.Text.Length > 0)
{
op = "";
multi_eq();
Display2.ResetText();
Display.Text = answer.ToString();
}
break;
}
}