private void Sub_Click(object sender, EventArgs e)
{
Equal.Focus();
if (Equasion.Text.EndsWith("+") || Equasion.Text.EndsWith("-") || Equasion.Text.EndsWith("*") || Equasion.Text.EndsWith("/") || Equasion.Text.EndsWith(","))
{
Equasion.Text = Equasion.Text.Remove(Equasion.Text.Length - 1);
}
if (Equasion.Text.Equals("0"))
{
Equasion.ResetText();
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "-");
}
private void Form1_KeyDown(object sender, KeyEventArgs e)
{
Equal.Focus();
if (e.KeyCode == Keys.Left || e.KeyCode == Keys.Up || e.KeyCode == Keys.Right || e.KeyCode == Keys.Down)
{
Equasion.Text = Equasion.Text.Remove(Equasion.Text.Length - 1);
}
Text = Convert.ToString(e.KeyValue);
if (e.Modifiers == Keys.Enter)
{
Answer.Text = Calculate(Equasion.Text);
if (Answer.Text == "ERROR")
{
return;
}
Equasion.Text = Answer.Text;
}
if (e.Shift)
{
switch (e.KeyValue)
{
case 27:
Close();
break;
case 187:
if (Equasion.Text.EndsWith("+") || Equasion.Text.EndsWith("-") || Equasion.Text.EndsWith("*") || Equasion.Text.EndsWith("/"))
{
Equasion.Text = Equasion.Text.Remove(Equasion.Text.Length - 1);
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "*");
return;
case 55:
if (Equasion.Text.EndsWith("+") || Equasion.Text.EndsWith("-") || Equasion.Text.EndsWith("*") || Equasion.Text.EndsWith("/"))
{
Equasion.Text = Equasion.Text.Remove(Equasion.Text.Length - 1);
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "/");
return;
}
}
switch (e.KeyValue)
{
case 48:
if (Equasion.Text == "0")
{
Equasion.Text = "";
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "0");
break;
case 49:
if (Equasion.Text == "0")
{
Equasion.Text = "";
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "1");
break;
case 50:
if (Equasion.Text == "0")
{
Equasion.Text = "";
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "2");
break;
case 51:
if (Equasion.Text == "0")
{
Equasion.Text = "";
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "3");
break;
case 52:
if (Equasion.Text == "0")
{
Equasion.Text = "";
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "4");
break;
case 53:
if (Equasion.Text == "0")
{
Equasion.Text = "";
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "5");
break;
case 54:
if (Equasion.Text == "0")
{
Equasion.Text = "";
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "6");
break;
case 55:
if (Equasion.Text == "0")
{
Equasion.Text = "";
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "7");
break;
case 56:
if (Equasion.Text == "0")
{
Equasion.Text = "";
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "8");
break;
case 57:
if (Equasion.Text == "0")
{
Equasion.Text = "";
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "9");
break;
case 187:
if (Equasion.Text.EndsWith("+") || Equasion.Text.EndsWith("-") || Equasion.Text.EndsWith("*") || Equasion.Text.EndsWith("/") || Equasion.Text.EndsWith(","))
{
Equasion.Text = Equasion.Text.Remove(Equasion.Text.Length - 1);
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "+");
break;
case 107:
if (Equasion.Text.EndsWith("+") || Equasion.Text.EndsWith("-") || Equasion.Text.EndsWith("*") || Equasion.Text.EndsWith("/") || Equasion.Text.EndsWith(","))
{
Equasion.Text = Equasion.Text.Remove(Equasion.Text.Length - 1);
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "+");
break;
case 189:
if (Equasion.Text.EndsWith("+") || Equasion.Text.EndsWith("-") || Equasion.Text.EndsWith("*") || Equasion.Text.EndsWith("/") || Equasion.Text.EndsWith(","))
{
Equasion.Text = Equasion.Text.Remove(Equasion.Text.Length - 1);
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "-");
break;
case 109:
if (Equasion.Text.EndsWith("+") || Equasion.Text.EndsWith("-") || Equasion.Text.EndsWith("*") || Equasion.Text.EndsWith("/") || Equasion.Text.EndsWith(","))
{
Equasion.Text = Equasion.Text.Remove(Equasion.Text.Length - 1);
}
if (Equasion.Text.Equals("0"))
{
Equasion.ResetText();
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "-");
break;
case 106:
if (Equasion.Text.EndsWith("+") || Equasion.Text.EndsWith("-") || Equasion.Text.EndsWith("*") || Equasion.Text.EndsWith("/") || Equasion.Text.EndsWith(","))
{
Equasion.Text = Equasion.Text.Remove(Equasion.Text.Length - 1);
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "*");
break;
case 111:
if (Equasion.Text.EndsWith("+") || Equasion.Text.EndsWith("-") || Equasion.Text.EndsWith("*") || Equasion.Text.EndsWith("/") || Equasion.Text.EndsWith(","))
{
Equasion.Text = Equasion.Text.Remove(Equasion.Text.Length - 1);
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "/");
break;
case 188:
if (Equasion.Text.Split(new char[] { '+', '-', '*', '/' })[(Equasion.Text.Split(new char[] { '+', '-', '*', '/' }).Length - 1)].Contains(","))
{
return;
}
if (Equasion.Text.EndsWith("+") || Equasion.Text.EndsWith("-") || Equasion.Text.EndsWith("*") || Equasion.Text.EndsWith("/"))
{
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "0");
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, ",");
break;
case 190:
if (Equasion.Text.Split(new char[] { '+', '-', '*', '/' })[(Equasion.Text.Split(new char[] { '+', '-', '*', '/' }).Length - 1)].Contains(","))
{
return;
}
if (Equasion.Text.EndsWith("+") || Equasion.Text.EndsWith("-") || Equasion.Text.EndsWith("*") || Equasion.Text.EndsWith("/"))
{
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, "0");
}
Equasion.Text = Equasion.Text.Insert(Equasion.Text.Length, ",");
break;
case 27:
WindowState = FormWindowState.Minimized;
break;
case 46:
Equasion.Text = "0";
break;
case 8:
if (Equasion.Text.Length == 1)
{
Equasion.Text = "0";
return;
}
Equasion.Text = Equasion.Text.Remove(Equasion.Text.Length - 1);
break;
}
}