private object Evaluate(string _function, Dictionary<char, double> _variables)
{
var parser = new IntegrationLib.Parser();
Parser.IManyArgumentsFunction resultFunction = null;
try
{
resultFunction = parser.ParseString(_function);
}
catch (Exception ex)
{
return "Ошибка при парсинге";
}
try
{
return resultFunction.GetValue(_variables);
}
catch (Exception ex)
{
return "Ошибка при вычислении значения распарсенного выражения";
}
}
private void Integrate_Click(object sender, EventArgs e)
{
String function="";
double from = 0;
double to = 0;
double error = 0;
Char variable = ' ';
if (!GetInputs(ref function, ref from, ref to, ref error, ref variable))
return;
Parser parser = new Parser();
Parser.IManyArgumentsFunction f_many_arguments = parser.ParseString(function);
Dictionary<char, double> args = new Dictionary<char, double>();
args.Add(variable, 0);
FunctionContainer functionContainer = new FunctionContainer();
FunctionContainer.IFunction f_one_argument = functionContainer.CreateOneArgumentFunction(f_many_arguments.GetValue, args, variable);
Derivator derivator = new Derivator();
if (RadioRectangle.Checked)
{
Derivator.IManyArgumentsDerivative d_2_many_arguments = derivator.Derivate(function, variable, 2);
FunctionContainer.IFunction d_2_one_argument = functionContainer.CreateOneArgumentFunction(d_2_many_arguments.GetValue, args, variable);
IntegrationLib.Integrators.RectanglesIntegrator rectanglesIntegrator = new IntegrationLib.Integrators.RectanglesIntegrator();
MessageBox.Show(rectanglesIntegrator.Integrate(f_one_argument.GetValue, d_2_one_argument.GetValue, from, to, error).ToString());
}
else
if (RadioTrapeze.Checked)
{
Derivator.IManyArgumentsDerivative d_2_many_arguments = derivator.Derivate(function, variable, 2);
FunctionContainer.IFunction d_2_one_argument = functionContainer.CreateOneArgumentFunction(d_2_many_arguments.GetValue, args, variable);
IntegrationLib.Integrators.TrapezeIntegrator trapezeIntegrator = new IntegrationLib.Integrators.TrapezeIntegrator();
MessageBox.Show(trapezeIntegrator.Integrate(f_one_argument.GetValue, d_2_one_argument.GetValue, from, to, error).ToString());
}
else
if (RadioSimpsons.Checked)
{
Derivator.IManyArgumentsDerivative d_4_many_arguments = derivator.Derivate(function, variable, 4);
FunctionContainer.IFunction d_4_one_argument = functionContainer.CreateOneArgumentFunction(d_4_many_arguments.GetValue, args, variable);
IntegrationLib.Integrators.SimpsonsIntegrator simpsonsIntegrator = new IntegrationLib.Integrators.SimpsonsIntegrator();
MessageBox.Show(simpsonsIntegrator.Integrate(f_one_argument.GetValue, d_4_one_argument.GetValue, from, to, error).ToString());
}
else
{
Derivator.IManyArgumentsDerivative d_2_many_arguments = derivator.Derivate(function, variable, 2);
Derivator.IManyArgumentsDerivative d_4_many_arguments = derivator.Derivate(function, variable, 4);
FunctionContainer.IFunction d_2_one_argument = functionContainer.CreateOneArgumentFunction(d_2_many_arguments.GetValue, args, variable);
FunctionContainer.IFunction d_4_one_argument = functionContainer.CreateOneArgumentFunction(d_4_many_arguments.GetValue, args, variable);
IntegrationLib.Integrators.RectanglesIntegrator rectanglesIntegrator = new IntegrationLib.Integrators.RectanglesIntegrator();
IntegrationLib.Integrators.TrapezeIntegrator trapezeIntegrator = new IntegrationLib.Integrators.TrapezeIntegrator();
IntegrationLib.Integrators.SimpsonsIntegrator simpsonsIntegrator = new IntegrationLib.Integrators.SimpsonsIntegrator();
Container cnt = new Container();
cnt.Add(rectanglesIntegrator, "Rectangles");
cnt.Add(trapezeIntegrator, "Trapeze");
cnt.Add(simpsonsIntegrator, "Simpsons");
String result = "Прямоугольники:\t" + rectanglesIntegrator.Integrate(f_one_argument.GetValue, d_2_one_argument.GetValue, from, to, error).ToString() + "\n";
result += "Трапеции:\t" + trapezeIntegrator.Integrate(f_one_argument.GetValue, d_2_one_argument.GetValue, from, to, error).ToString() + "\n";
result += "Симпсон:\t\t" + simpsonsIntegrator.Integrate(f_one_argument.GetValue, d_2_one_argument.GetValue, from, to, error).ToString() + "\n";
MessageBox.Show(result);
}
}
public SyntaxTreeNode(Parser.Item type)
{
Type = type;
}
