public void CalculateRPN(string postfix, decimal expectedresult)
{
decimal actualresult;
RPNParser rpnparser = new RPNParser();
actualresult = rpnparser.CalculateRPN(postfix);
Assert.AreEqual(expectedresult, actualresult);
}
private void equalButton_Click(object sender, EventArgs e)
{
string exprn = string.Join(" ", expression.ToArray());
SYParser syp = new SYParser();
RPNParser rpn = new RPNParser();
syp.setExpr(exprn);
rpnexpr = syp.getRPN();
result = rpn.CalculateRPN(rpnexpr);
result1 = Convert.ToString(result);
expression.Clear();
expression.Add(result1);
UpdateDisplay();
}
/// <summary>
/// Возвращает уже инициализированный парсер, в котором уже есть большинство стандартных функций,
/// избавлят от необходимости инициализировать самостоятельно.
/// </summary>
/// <returns></returns>
public static RPNParser Default()
{
var rpnParser = new RPNParser();
rpnParser.AddBinaryOperation(new BinaryOperationToken('-', (a, b) => a - b, 0, Associativity.Left));
rpnParser.AddBinaryOperation(new BinaryOperationToken('+', (a, b) => a + b, 0, Associativity.Left));
rpnParser.AddBinaryOperation(new BinaryOperationToken('*', (a, b) => a * b, 1, Associativity.Left));
rpnParser.AddBinaryOperation(new BinaryOperationToken('/', (a, b) => a / b, 1, Associativity.Left));
rpnParser.AddBinaryOperation(new BinaryOperationToken('%', (a, b) => a % b, 1, Associativity.Left));
rpnParser.AddBinaryOperation(new BinaryOperationToken('^', (a, b) => Math.Pow(a, b), 2, Associativity.Right));
rpnParser.AddFunction(new FunctionToken("!", (x) =>
{
if (x < 0 || x - (int)x > Double.Epsilon)
{
throw new Exception("Факториал определен для целых положительных чисел");
}
double result = 1;
for (int i = 2; i != (int)x + 1; i++)
{
result *= i;
}
return(result);
}, FunctionType.Postfix));
rpnParser.AddFunction(new FunctionToken("sin", (x) => Math.Sin(x), FunctionType.Prefix));
rpnParser.AddFunction(new FunctionToken("cos", (x) => Math.Cos(x), FunctionType.Prefix));
rpnParser.AddFunction(new FunctionToken("tan", (x) => Math.Tan(x), FunctionType.Prefix));
rpnParser.AddFunction(new FunctionToken("sqrt", (x) => Math.Sqrt(x), FunctionType.Prefix));
rpnParser.AddFunction(new FunctionToken("abs", (x) => Math.Abs(x), FunctionType.Prefix));
rpnParser.AddFunction(new FunctionToken("log", (x) => Math.Log(x), FunctionType.Prefix));
rpnParser.AddFunction(new FunctionToken("log10", (x) => Math.Log10(x), FunctionType.Prefix));
rpnParser.AddFunction(new FunctionToken("round", (x) => Math.Round(x), FunctionType.Prefix));
rpnParser.AddFunction(new FunctionToken("truncate", (x) => Math.Truncate(x), FunctionType.Prefix));
rpnParser.AddFunction(new FunctionToken("arccosine", (x) => Math.Acos(x), FunctionType.Prefix));
rpnParser.AddFunction(new FunctionToken("arcsine", (x) => Math.Asin(x), FunctionType.Prefix));
rpnParser.AddFunction(new FunctionToken("arctan", (x) => Math.Atan(x), FunctionType.Prefix));
return(rpnParser);
}
static void Main(string[] args)
{
var rpnParser = RPNParser.Default();
while (true)
{
//
Console.WriteLine("Введите выражение:");
var expression = Console.ReadLine();
try
{
var rpn = rpnParser.Parse(expression);
var result = RPNCalculator.Calculate(rpn);
Console.WriteLine(String.Format("={0:F10}", result));
}
catch (FormatException e)
{
Console.WriteLine(e.Message);
}
}
}
