public override void Calculate()
{
if (null == node1)
{
isint = false;
fresult = Double.NaN;
calculated = true;
return;
}
node1.Calculate();
isint = false;
double src = node1.isint ? node1.result : node1.fresult;
switch (func)
{
case FuncID.Sin:
fresult = Math.Sin(src); break;
case FuncID.Cos:
fresult = Math.Cos(src); break;
case FuncID.Tan:
fresult = Math.Tan(src); break;
default: break;
}
calculated = true;
}
private void Calculate_Button_Click(object sender, RoutedEventArgs e)
{
if ("" == raw_input.Text)
{
return;
}
Calc_node node = null;
try
{
node = G.Generate(raw_input.Text);
node.Calculate();
}
catch (Exception)
{
result_box.Text = "算式中存在错误";
return;
}
if (node.isint)
{
result_box.Text = node.result.ToString();
}
else if (Double.IsNaN(node.fresult))
{
result_box.Text = "算式中存在错误";
return;
}
else
{
result_box.Text = node.fresult.ToString();
}
}
public override void Calculate()
{
if (internal_node != null)
{
internal_node.Calculate();
if (internal_node.isint)
{
isint = true;
result = internal_node.result;
}
else
{
isint = false;
fresult = internal_node.fresult;
}
}
else
{
isint = false;
fresult = Double.NaN;
}
calculated = true;
}
public override void Calculate()
{
if (null == node1 || null == node2)
{
isint = false;
fresult = Double.NaN;
calculated = true;
return;
}
node1.Calculate();
node2.Calculate();
isint = node1.isint && node2.isint && (op != Operator.EXPO) && (op != Operator.LOG) &&
((op != Operator.DIVIDE) || (node2.result != 0 && node1.result % node2.result == 0));
if (isint)
{
checked
{
try
{
switch (op)
{
case Operator.ADD:
result = node1.result + node2.result; break;
case Operator.MINUS:
result = node1.result - node2.result; break;
case Operator.MULTI:
result = node1.result * node2.result; break;
case Operator.DIVIDE:
result = node1.result / node2.result; break;
default: break;
}
}
catch (OverflowException)
{
isint = false;
}
}
}
if (!isint)
{
if (node1.isint)
{
node1.fresult = node1.result;
}
if (node2.isint)
{
node2.fresult = node2.result;
}
switch (op)
{
case Operator.ADD:
fresult = node1.fresult + node2.fresult; break;
case Operator.MINUS:
fresult = node1.fresult - node2.fresult; break;
case Operator.MULTI:
fresult = node1.fresult * node2.fresult; break;
case Operator.DIVIDE:
fresult = node1.fresult / node2.fresult; break;
case Operator.EXPO:
fresult = Math.Pow(node1.fresult, node2.fresult); break;
case Operator.LOG:
fresult = Math.Log(node2.fresult, node1.fresult); break;
default: break;
}
}
calculated = true;
}
