public void Derive_ComplexConstant_Returns0()
{
Environment environment = new Environment();
SyntaxNode node = Parser.ParseExpression("(2 * 2) + 4 ^ 2 - 5 / 5", environment);
Expression expression = new Expression(node, environment);
Derivative derivative = new Derivative(expression, "x");
Assert.AreEqual(derivative.Derive().ToString(), "0");
}
public void Derive_x_Returns1()
{
Environment environment = new Environment();
environment.AddSymbol("x");
SyntaxNode node = Parser.ParseExpression("x", environment);
Expression expression = new Expression(node, environment);
Derivative derivative = new Derivative(expression, "x");
Assert.AreEqual(derivative.Derive().ToString(), "1");
}
public static void Main(string[] args)
{
while (true)
{
Console.WriteLine("Enter an expression to derive");
string rawExpression = Console.ReadLine();
ExpressionParser.Parsing.Environment environment = new ExpressionParser.Parsing.Environment();
environment.AddSymbol("x");
SyntaxNode node = Parser.ParseExpression(rawExpression, environment);
Expression expression = new Expression(node, environment);
Derivative derivative = new Derivative(expression, "x");
Console.WriteLine(derivative.Derive());
Console.WriteLine();
}
}
private void CalculateOptimizeProductionAmount()
{
Func <double, double> f = x => A + B * x + C * Math.Pow(x, 2);
Func <double, double> dtk = x => A / x + B + C * x;
var dtkFirstDerivative = Derivative.Derive(dtk, 1);
OptimizeAmount = Math.Round(FindRoots.OfFunction(dtkFirstDerivative, 1, 500));
OptimizeProductionCosts = dtk(OptimizeAmount);
if (OptimizeProductionCosts < SellPrice)
{
Func <double, double> g = x => SellPrice * x - (A + B * x + C * Math.Pow(x, 2));
var gFirstDerivative = Derivative.Derive(g, 1);
ProfitAmount = Math.Round(FindRoots.OfFunction(gFirstDerivative, 1, 500));
Profit = g(ProfitAmount);
}
else
{
Profit = double.NaN;
}
}