private void btnOperator_Click(object sender, EventArgs e)
{
if (((Button)sender).Text == "%")
{
percen = true;
}
if (has2 == true)
{
string secondOperand = lblDisplay.Text;
if (percen == true)
{
secondOperand = (Convert.ToDouble(secondOperand) * Convert.ToDouble(firstOperand) / 100).ToString();
}
string result = CalculateEngine.calculate(operate, firstOperand, secondOperand); ///3232332323232323232
double m = Convert.ToDouble(result);
percen = false;
if (result is "E" || result.Length > 8)
{
lblDisplay.Text = "Error";
}
else
{
lblDisplay.Text = result;
}
has2 = false;
isAfterOperater = false;
}
static public string calculate(string operate, string firstOperand, string secondOperand, int maxOutputSize = 8)
{
MainForm.keep2 = secondOperand;
switch (operate)
{
case "+":
return((Convert.ToDouble(firstOperand) + Convert.ToDouble(secondOperand)).ToString());
case "-":
return((Convert.ToDouble(firstOperand) - Convert.ToDouble(secondOperand)).ToString());
case "X":
return((Convert.ToDouble(firstOperand) * Convert.ToDouble(secondOperand)).ToString());
case "÷":
// Not allow devide be zero
if (secondOperand != "0")
{
double result;
string[] parts;
int remainLength;
result = (Convert.ToDouble(firstOperand) / Convert.ToDouble(secondOperand));
// split between integer part and fractional part
parts = result.ToString().Split('.');
// if integer part length is already break max output, return error
if (parts[0].Length > maxOutputSize)
{
return("E");
}
// calculate remaining space for fractional part.
remainLength = maxOutputSize - parts[0].Length - 1;
// trim the fractional part gracefully. =
return(result.ToString("N" + remainLength));
}
break;
case "%":
secondOperand = ((Convert.ToDouble(secondOperand) * Convert.ToDouble(firstOperand)) / 100).ToString();
string res = CalculateEngine.calculate(operate, firstOperand, secondOperand);
return(res);
break;
}
return("E");
// return "E";
// percen = true;
}