public void AccumulateDigits(char item, bool isInput)
{
if (isInput)
{
result = result + item;
invoker.Invoke(result);
currentState = CalcStates.AccumulateDigits;
}
else
{
if (digits.Contains(item))
{
AccumulateDigits(item, true);
}
else if (operations.Contains(item))
{
ComputePending(item, true);
}
else if (separators.Contains(item))
{
AccumulateDigitsWithDecimal(item, true);
}
else if (equals.Contains(item))
{
Compute(item, true);
}
else if (operations.Contains(item))
{
ComputePending(item, true);
}
}
}
public void Zero(char item, bool isInput)
{
if (isInput)
{
numbers = "0";
result = "0";
op = '.';
invoker.Invoke(numbers);
currentState = CalcStates.Zero;
}
else
{
if (nonzerodigits.Contains(item))
{
AccumulateDigits(item, true);
}
else if (separators.Contains(item))
{
AccumulateDigitsWithDecimal(item, true);
}
else if (zero.Contains(item))
{
Zero(item, true);
}
}
}
public void Compute(char item, bool isInput)
{
if (isInput)
{
currentState = CalcStates.Compute;
double a1 = double.Parse(numbers);
double a2 = double.Parse(result);
double a3 = 0;
if (op == '+')
{
a3 = a1 + a2;
}
else if (op == '-')
{
a3 = a1 - a2;
}
result = a3.ToString();
invoker.Invoke(result);
}
else
{
if (nonzerodigits.Contains(item))
{
AccumulateDigits(item, true);
}
else if (zero.Contains(item))
{
Zero(item, true);
}
else if (operations.Contains(item))
{
ComputePending(item, true);
}
}
}
public void ComputePending(char item, bool isInput)
{
if (isInput)
{
currentState = CalcStates.ComputePending;
op = item;
if (numbers != "")
{
double a1 = double.Parse(numbers);
double a2 = double.Parse(result);
double a3 = 0;
if (op == '+')
{
a3 = a1 + a2;
}
else if (op == '-')
{
a3 = a1 - a2;
}
result = a3.ToString();
}
numbers = result;
invoker.Invoke(result);
result = "";
}
else
{
if (digits.Contains(item))
{
AccumulateDigits(item, true);
}
}
}
public Calc()
{
currentState = CalcStates.FirstNumber;
firstNumber = 0;
secondNumber = 0;
resultNumber = 0;
}
public Calc()
{
currentstate = CalcStates.Firstnumber;
firstnumber = 0;
secondnumber = 0;
resultnumber = 0;
lastnumber = 0;
a = 0;
}
