private void btnCalc_Click(object sender, EventArgs e)
{
bool ok = false;
Factorial fact = new Factorial();
int n = 0;
ok = int.TryParse(textBox1.Text, out n);
if (!ok)
{
textBox1.Text = "Некорректный ввод!";
}
else if (ok && n > 0)
{
result.Text = n + "! = " + fact.calculate(n);
}
}
private void btnCalc_Click(object sender, EventArgs e) // When the calculate button is clicked
{
if (cmbFunction.Text == "num1+num2")
{
try
{
LblResult.Text = Convert.ToString(Convert.ToDouble(txtNum1.Text) + Convert.ToDouble(txtNum2.Text));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else if (cmbFunction.Text == "num1-num2")
{
try
{
LblResult.Text = Convert.ToString(Convert.ToDouble(txtNum1.Text) - Convert.ToDouble(txtNum2.Text));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else if (cmbFunction.Text == "num1*num2")
{
try
{
LblResult.Text = Convert.ToString(Convert.ToDouble(txtNum1.Text) * Convert.ToDouble(txtNum2.Text));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else if (cmbFunction.Text == "num1÷num2")
{
try
{
LblResult.Text = Convert.ToString(Convert.ToDouble(txtNum1.Text) / Convert.ToDouble(txtNum2.Text));
}
catch
{
LblResult.Text = "Math Error";
}
}
else if (cmbFunction.Text == "num1 Mod num2")
{
try
{
LblResult.Text = Convert.ToString(Convert.ToDouble(txtNum1.Text) % Convert.ToDouble(txtNum2.Text));
}
catch
{
LblResult.Text = "Math Error";
}
}
else if (cmbFunction.Text == "√(num2)")
{
if (txtNum1.Text == "" && !(txtNum2.Text == ""))
{
try
{
LblResult.Text = Convert.ToString(Math.Sqrt(Convert.ToDouble(txtNum2.Text)));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else if (txtNum2.Text == "" && !(txtNum1.Text == ""))
{
try
{
LblResult.Text = Convert.ToString(Math.Sqrt(Convert.ToDouble(txtNum1.Text)));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else
{
LblResult.Text = "Maths Error";
}
}
else if (cmbFunction.Text == "Sin(num)")
{
if (txtNum1.Text == "" && !(txtNum2.Text == ""))
{
try
{
double degval = Convert.ToDouble(txtNum2.Text);
double radval = (degval * Math.PI) / 180;
double ang = Math.Sin(radval);
LblResult.Text = Convert.ToString(ang);
}
catch
{
LblResult.Text = "Maths Error";
}
}
else if (txtNum2.Text == "" && !(txtNum1.Text == ""))
{
try
{
double degval = Convert.ToDouble(txtNum1.Text);
double radval = (degval * Math.PI) / 180;
double ang = Math.Sin(radval);
LblResult.Text = Convert.ToString(ang);
}
catch
{
LblResult.Text = "Maths Error";
}
}
else
{
LblResult.Text = "Maths Error";
}
}
else if (cmbFunction.Text == "Cos(num)")
{
if (txtNum1.Text == "" && !(txtNum2.Text == ""))
{
try
{
double degval = Convert.ToDouble(txtNum2.Text);
double radval = (degval * Math.PI) / 180;
double ang = Math.Cos(radval);
LblResult.Text = Convert.ToString(ang);
}
catch
{
LblResult.Text = "Maths Error";
}
}
else if (txtNum2.Text == "" && !(txtNum1.Text == ""))
{
try
{
double degval = Convert.ToDouble(txtNum1.Text);
double radval = (degval * Math.PI) / 180;
double ang = Math.Cos(radval);
LblResult.Text = Convert.ToString(ang);
}
catch
{
LblResult.Text = "Maths Error";
}
}
else
{
LblResult.Text = "Maths Error";
}
}
else if (cmbFunction.Text == "Tan(num)")
{
if (txtNum1.Text == "" && !(txtNum2.Text == ""))
{
try
{
double degval = Convert.ToDouble(txtNum2.Text);
double radval = (degval * Math.PI) / 180;
double ang = Math.Tan(radval);
LblResult.Text = Convert.ToString(ang);
}
catch
{
LblResult.Text = "Maths Error";
}
}
else if (txtNum2.Text == "" && !(txtNum1.Text == ""))
{
try
{
double degval = Convert.ToDouble(txtNum1.Text);
double radval = (degval * Math.PI) / 180;
double ang = Math.Tan(radval);
LblResult.Text = Convert.ToString(ang);
}
catch
{
LblResult.Text = "Maths Error";
}
}
else
{
LblResult.Text = "Maths Error";
}
}
else if (cmbFunction.Text == "Log10(num)")
{
if (txtNum1.Text == "" && !(txtNum2.Text == ""))
{
try
{
LblResult.Text = Convert.ToString(Math.Log10(Convert.ToDouble(txtNum2.Text)));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else if (txtNum2.Text == "" && !(txtNum1.Text == ""))
{
try
{
LblResult.Text = Convert.ToString(Math.Log10(Convert.ToDouble(txtNum1.Text)));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else
{
LblResult.Text = "Maths Error";
}
}
else if (cmbFunction.Text == "ln(num)")
{
if (txtNum1.Text == "" && !(txtNum2.Text == ""))
{
try
{
LblResult.Text = Convert.ToString(Math.Log(Convert.ToDouble(txtNum2.Text)));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else if (txtNum2.Text == "" && !(txtNum1.Text == ""))
{
try
{
LblResult.Text = Convert.ToString(Math.Log(Convert.ToDouble(txtNum1.Text)));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else
{
LblResult.Text = "Maths Error";
}
}
else if (cmbFunction.Text == "num! (Factorial)")
{
if (txtNum1.Text == "" && !(txtNum2.Text == ""))
{
try
{
LblResult.Text = Convert.ToString(Factorial.Fact(Convert.ToInt32(txtNum2.Text)));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else if (txtNum2.Text == "" && !(txtNum1.Text == ""))
{
try
{
LblResult.Text = Convert.ToString(Factorial.Fact(Convert.ToInt32(txtNum1.Text)));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else
{
LblResult.Text = "Maths Error";
}
}
else if (cmbFunction.Text == "Abs(num)")
{
if (txtNum1.Text == "" && !(txtNum2.Text == "") && Convert.ToDouble(txtNum2.Text) < 0)
{
try
{
LblResult.Text = Convert.ToString(-1 * (Convert.ToDouble(txtNum2.Text)));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else if (txtNum2.Text == "" && Convert.ToDouble(txtNum1.Text) < 0 && !(txtNum1.Text == ""))
{
try
{
LblResult.Text = Convert.ToString(-1 * (Convert.ToDouble(txtNum1.Text)));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else if (txtNum1.Text == "" && !(txtNum2.Text == ""))
{
try
{
LblResult.Text = Convert.ToString((Convert.ToDouble(txtNum2.Text)));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else if (txtNum2.Text == "" && !(txtNum1.Text == ""))
{
try
{
LblResult.Text = Convert.ToString((Convert.ToDouble(txtNum1.Text)));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else
{
LblResult.Text = "Maths Error";
}
}
else if (cmbFunction.Text == "Random")
{
try
{
Random r = new Random();
LblResult.Text = Convert.ToString(r.Next((Convert.ToInt32(txtNum1.Text)), Convert.ToInt32(txtNum2.Text) + 1));
}
catch
{
LblResult.Text = "Maths Error";
}
}
else
{
LblResult.Text = "Result";
}
}
