private void equalsButton_Click(object sender, EventArgs e)
{
double lastnum = Int32.Parse(mainTextBox.Text);
if (LastInput == "equals")
{
lastnum = LastNum;
}
string lastop = LastOperation;
ExecuteOperation(lastop, lastnum);
DisplayVal = CurrVal;
mainTextBox.Text = DisplayVal.ToString();
LastInput = "equals";
}
private void SubtractionButton_Click(object sender, EventArgs e)
{
if (LastInput == "num")
{
var operation = (double)Int32.Parse(mainTextBox.Text) > 0 ? "subtract" : "add";
var num = mainTextBox.Text[0] == '-' ? (double)Int32.Parse(mainTextBox.Text.Substring(1)) : (double)Int32.Parse(mainTextBox.Text);
LastNum = num;
if (operation == "add")
{
ExecuteOperation("add", num);
}
else
{
ExecuteOperation("subtract", num);
}
LastInput = "operation";
LastOperation = "subtract";
DisplayVal = CurrVal;
mainTextBox.Text = DisplayVal.ToString();
}
}
