public void insertOP(OPERATION op)
{
double res;
Double.TryParse(currentBuffer, out res);
if (op == OPERATION.NEG)
{
res = -res;
total = res;
calcWindow.onCurrentValueChange(total.ToString());
return;
}
if (active_op == OPERATION.NULL)
{
total += res;
calcWindow.onCurrentValueChange(total.ToString());
active_op = op;
state = STATE.INSERT_BINARY_OP;
return;
}
switch (active_op)
{
case OPERATION.ADD:
total += res;
break;
case OPERATION.SUB:
total -= res;
break;
case OPERATION.DIV:
total /= res;
break;
case OPERATION.MUL:
total *= res;
break;
}
active_op = op;
calcWindow.onCurrentValueChange(total.ToString());
state = STATE.INSERT_BINARY_OP;
}
public Calculator(CalculatorWindow win)
{
calcWindow = win;
win.onCurrentValueChange(currentBuffer);
history = new LinkedList <string>();
}