static void Main(string[] args)
{
Stopwatch timer = new Stopwatch();
string expString;
Expression exp;
double a = 0;
while ((expString = Console.ReadLine()) != string.Empty)
{
try
{
exp = new Expression(expString);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
continue;
}
timer.Reset();
timer.Start();
for (int i = 0; i < 1000000; i++)
{
a = exp.Evaluate();
}
timer.Stop();
Console.WriteLine(a);
Console.WriteLine("{0} calculations per second", 1000000 / timer.Elapsed.TotalSeconds);
}
}
public void AddExpression(double arg1, double arg2, char operation)
{
var @operator = _operators.FirstOrDefault(x => x.Key == operation);
if (@operator == null)
{
//throw new InvalidOperationException("Operator not found");
Console.WriteLine("Operator is not implemented");
return;
}
var expr = new Expression(arg1, arg2, @operator);
expr.Calculate();
AddToHistoryList(expr);
System.Console.WriteLine(expr.ToString());
}
private Expression ParseDouble(LinkedListNode<string> node)
{
double termDouble;
if (double.TryParse(node.Value, out termDouble))
{
Number term = new Number(termDouble);
Expression expressionFromDouble = new Expression(term);
return expressionFromDouble;
}
return new Expression();
}
private Expression ParseSubtraction(Expression leftOperand, Expression rightOperand)
{
//return new Expression();
return Expression.Minus(leftOperand, rightOperand);
}
private Expression ParseAddition(Expression leftOperand, Expression rightOperand)
{
//return new Expression();
return Expression.Plus(leftOperand, rightOperand);
}
private Expression ParseDivision(Expression leftOperand, Expression rightOperand)
{
//return new Expression();
return Expression.Divided(leftOperand, rightOperand);
}
private Expression ParseMultiplication(Expression leftOperand, Expression rightOperand)
{
//return new Expression();
return Expression.Times(leftOperand, rightOperand);
}
private Expression ParseExponent(Expression leftOperand, Expression rightOperand)
{
return Expression.Power(leftOperand, rightOperand);
}
private Expression ParseOperator(Expression leftExpression, Expression rightExpression, string oper)
{
switch (oper)
{
case "**":
return ParseExponent(leftExpression, rightExpression);
case "*":
return ParseMultiplication(leftExpression, rightExpression);
case "/":
return ParseDivision(leftExpression, rightExpression);
case "+":
return ParseAddition(leftExpression, rightExpression);
case "-":
return ParseSubtraction(leftExpression, rightExpression);
}
//}
return new Expression();
}
private void ParseListToExpression(LinkedListNode<string> node)
{
int expressionNumber = 0;
double throwAway;
for (LinkedListNode<string> current = node.List.First; current != null; current = current?.Next)
{
if (operators.Contains(current.Value))
{
if (double.TryParse(current?.Previous?.Value, out throwAway) &&
double.TryParse(current?.Next?.Value, out throwAway))
{
_expression = ParseOperator(ParseDouble(current.Previous), ParseDouble(current.Next),
current.Value);
_expressionList.AddLast(_expression);
RemoveParen(current, expressionNumber);
expressionNumber++;
}
if (double.TryParse(current?.Previous?.Value, out throwAway) &&
(current?.Next?.Value?.Contains("E") ?? false))
{
LinkedListNode<Expression> expressionNode = FindExpressionNode(current?.Next);
expressionNode.Value = ParseOperator(ParseDouble(current.Previous), expressionNode.Value, current.Value);
RemoveParen(current, GetIntFromString(current?.Next?.Value.Remove(0, 1)));
}
if ((current?.Previous?.Value?.Contains("E") ?? false) &&
double.TryParse(current?.Next?.Value, out throwAway))
{
LinkedListNode<Expression> expressionNode = FindExpressionNode(current?.Previous);
expressionNode.Value = ParseOperator(expressionNode.Value, ParseDouble(current.Next), current.Value);
RemoveParen(current, GetIntFromString(current?.Previous?.Value.Remove(0, 1)));
}
if ((current?.Previous?.Value?.Contains("E") ?? false) && (current?.Next?.Value?.Contains("E") ?? false))
{
LinkedListNode<Expression> expressionNode = FindExpressionNode(current?.Previous);
expressionNode.Value = ParseOperator(expressionNode.Value, expressionNode?.Next?.Value, current.Value);
expressionNode.List.Remove(expressionNode?.Next);
RemoveParen(current, GetIntFromString(current?.Next?.Value.Remove(0, 1)));
RenameExpressionNodes(current);
}
}
}
if (_expressionList.Count > 1)
{
//throw new ExecutionEngineException("_expressionList has too many items and was not processed.");
}
else
{
_expression = _expressionList.First.Value;
}
}
public void AddToHistoryList(Expression e)
{
_historylist.Add(e);
}
static void Main(string[] args)
{
Expression e = new Expression(args[1]);
System.Console.WriteLine(e.Evaluate());
}
void calculate()
{
try
{
Expression exp = new Expression(Display);
exp.SetVariable("Ans", answer);
answer = exp.Evaluate();
string ans = answer.ToString();
allClear();
int i = 0;
if (ans[0] == '-')
{
addToDisplay(Tokens.UnaryMinus, "-");
i++;
}
if (char.IsDigit(ans[i]))
{
foreach (char c in ans)
{
if (char.IsDigit(c))
addToDisplay(Tokens.Digit, c.ToString());
else if (c == '.')
addToDisplay(Tokens.Point, c.ToString());
else if (c == 'E')
addToDisplay(Tokens.Exp, c.ToString());
else if (c == '+' || c == '-')
addToDisplay(Tokens.ExpOperator, c.ToString());
}
}
else
{
// NaN, Infinity etc.
addToDisplay(Tokens.Variable, ans.Substring(i, ans.Length - i));
}
resultState = true;
}
catch (Exception e) when (e is ArgumentException || e is OverflowException || e is FormatException)
{
// OverflowException and FormatException are thrown by Double.Parse from within Expression.Evaluate
}
}