Add C# as another examples #346
Description
Hi!
so when I eventually looked at the rust and java code... I realized there is no virtual and override (well it does show in java, but not explicit)
so why not add C# as another examples of polymorphism in appendix B
// C# implementation of the Taylor series example program based on
// subtyping given in Appendix B of the proposal "Improved run-time
// polymorphism for Fortran".
//
using System;
public interface IDeriv {
void Deriv1();
}
public interface IHDeriv : IDeriv {
void Deriv2();
}
public abstract class DerivativeBase : IDeriv {
public virtual void Deriv1() {
Console.WriteLine(" Default derivative implementation.");
}
}
public class DerivF : DerivativeBase {
public override void Deriv1() {
Console.WriteLine(" 1st derivative of function F!");
}
}
public class HDerivF : DerivativeBase, IHDeriv {
public override void Deriv1() {
Console.WriteLine(" 1st derivative of function F!");
}
public void Deriv2() {
Console.WriteLine(" 2nd derivative of function F!");
}
}
public class DerivG : DerivativeBase
{
public override void Deriv1() {
Console.WriteLine(" 1st derivative of function G!");
}
}
public class HDerivG : DerivativeBase, IHDeriv {
public override void Deriv1() {
Console.WriteLine(" 1st derivative of function G!");
}
public void Deriv2() {
Console.WriteLine(" 2nd derivative of function G!");
}
}
public class Taylor {
private readonly IDeriv _calc;
public Taylor(IDeriv calc) {
_calc = calc;
}
public void Term1() {
_calc.Deriv1();
}
public void Evaluate() {
Console.WriteLine("Evaluating Taylor series using");
Term1();
}
}
public class HTaylor {
private readonly IHDeriv _calc;
public HTaylor(IHDeriv calc) {
_calc = calc;
}
public void Term1() {
_calc.Deriv1();
}
public void Term2() {
_calc.Deriv2();
}
public void Evaluate() {
Console.WriteLine("Evaluating Taylor series using");
Term1();
Term2();
}
}
class Program {
static void Main() {
IDeriv derivg = new DerivG();
IDeriv derivf = new DerivF();
IHDeriv hderivg = new HDerivG();
IHDeriv hderivf = new HDerivF();
Taylor evalG = new Taylor(derivg);
Taylor evalF = new Taylor(derivf);
HTaylor hevalG = new HTaylor(hderivg);
HTaylor hevalF = new HTaylor(hderivf);
evalG.Evaluate();
Console.WriteLine();
evalF.Evaluate();
Console.WriteLine();
hevalG.Evaluate();
Console.WriteLine();
hevalF.Evaluate();
}
}