public static string SimpAddAndSub(string s)
{
// Replacing -- with +
ControllerDecimal.ReplaceDoubleMinuses(s);
// Calculating addition.
s = SimpAdd(s);
// Calculating subtraction.
s = SimpSub(s);
return(s);
}
private void ResultBut_Click(object sender, EventArgs e)
{
// Indiciates whether the string has the right format or not.
bool format = true;
// If it's empty.
if (format)
{
if (MainTextBox.Text == "")
{
format = false;
MessageBox.Show("The string is empty!", "Input error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
// If there are unclosed brackets.
if (format)
{
if (Brac1Count != Brac2Count)
{
format = false;
MessageBox.Show("There are unclosed brackets!", "Input error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
// If the last symbol is not a digit or the closing bracket.
if (format)
{
if (!Char.IsDigit(MainTextBox.Text[MainTextBox.Text.Length - 1]) &&
MainTextBox.Text[MainTextBox.Text.Length - 1] != ')')
{
format = false;
MessageBox.Show("The last symbol should be a digit or the closing bracket!", "Input error!",
MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
// If the input string has a right format
if (format)
{
// Calculations.
// Enabling converters.
if (SimpFCheckBox.Checked)
{
ToDecBut.Enabled = true;
}
else
{
ToSimpleBut.Enabled = true;
}
// If it's the decimal calculations.
string result = "";
if (DecFCheckBox.Checked)
{
result = ControllerDecimal.DecFracCalcAll(MainTextBox.Text);
}
else
{
result = ControllerSimple.SimpFracCalcAll(MainTextBox.Text);
}
PreviousStrLabel.Text = MainTextBox.Text + "=" + result;
MainTextBox.Text = result;
}
}