private void textBox1_TextChanged(object sender, EventArgs e)
{
label2.Text = "0";
bool ok = int.TryParse(textBox1.Text, out int n);
Factorial obj = new Factorial();
if (n > 0 && ok)
{
label2.Text = Convert.ToString(obj.count(n));
}
}
private void button1_Click(object sender, EventArgs e)
{
if (radioButton1.Checked == true)
{
Factorial f1 = new Factorial();
f1.Show();
}
else if (radioButton2.Checked == true)
{
Form2 f2 = new Form2();
f2.Show();
}
}
private void button1_Click(object sender, EventArgs e)
{
if (checkedListBox1.CheckedIndices.Count == 0) //check if algorithm is been chosen
{
MessageBox.Show("Choose algorithm!");
return;
}
if (textBox1.Text.Length < 1) //check if the represented number string is not empty
{
MessageBox.Show("Type integer number!");
return;
}
string checkstring = "0123456789";
try
{
//Check if the string only consists of the numerals
int SymbolsCount = 0;
foreach (char c in checkstring)
{
for (int i = 0; i < textBox1.Text.Length; i++)
{
if (textBox1.Text[i] == c)
{
SymbolsCount++;
}
}
}
if (SymbolsCount == textBox1.Text.Length)
{
AccurateFactorial n = new AccurateFactorial(textBox1.Text);
n = n.DisposeZero(n); //Dispose of extra zeros in the beginning
textBox1.Text = n.ToString();
//Choosing different methods depending on the selected algorithm
if (checkedListBox1.CheckedIndices[0] != 5)
{
if (long.TryParse(textBox1.Text, out long m))
{
switch (checkedListBox1.CheckedIndices[0])
{
case 0:
textBox2.Text = Factorial.GetFactorialWithCycles(m).ToString();
break;
case 1:
textBox2.Text = Factorial.GetFactorial(m).ToString();
break;
case 2:
textBox2.Text = Factorial.Approximation(m, "Ramanujan").ToString();
break;
case 3:
textBox2.Text = Factorial.Approximation(m, "Stirling").ToString();
break;
case 4:
textBox2.Text = Factorial.Approximation(m, "").ToString();
break;
}
if (long.TryParse(textBox2.Text, out long k))
{
if (k < 1 || m > 20)
{//Coud not calculate the factorial
textBox2.Text = "Error";
MessageBox.Show("The number is too big for the current method");
return;
}
}
}
return;
}
//check if the number is small enough
if (n.value.Length > 4 || (n.value.Length > 3 && n.value[0] > 6 && n.value[1] > 7))
{
textBox2.Text = $"The number {n.ToString()} is too big integer number (>=7500)";
return;
}
Factorial f = new Factorial(); //I made all methods to be used in the Factorial class
n = new AccurateFactorial(f.Accurate(n).value); //calculate using the best method
textBox2.Text = n.ToString(); //write result
}
else
{
textBox2.Text = "Error: the string must contain only numerals";
}
}
catch (Exception) {
MessageBox.Show("Unkown Error");
}
}
