C＃传递函数作为参数 [英] C# Passing Function as Argument

问题描述

我已经写在C＃中，做了数值微分的功能。它看起来是这样的：

I've written a function in C# that does a numerical differentiation. It looks like this:

public double Diff(double x)
{
    double h = 0.0000001;

    return (Function(x + h) - Function(x)) / h;
}

我希望能在任何函数传递，如：

I would like to be able to pass in any function, as in:

public double Diff(double x, function f)
{
    double h = 0.0000001;

    return (f(x + h) - f(x)) / h;
}

我认为这是可能的代表（也许？），但我不知道如何使用它们。

I think this is possible with delegates (maybe?) but I'm not sure how to use them.

任何帮助将大大AP preciated。

Any help would be greatly appreciated.

谢谢，灰分

推荐答案

使用FUNC上述工程提到，但也有与会代表，执行相同任务，还可以定义命名内意图：

Using the Func as mentioned above works but there are also delegates that do the same task and also define intent within the naming:

public delegate double MyFunction(double x);

public double Diff(double x, MyFunction f)
{
    double h = 0.0000001;

    return (f(x + h) - f(x)) / h;
}

public double MyFunctionMethod(double x)
{
    // Can add more complicated logic here
    return x + 10;
}

public void Client()
{
    double result = Diff(1.234, x => x * 456.1234);
    double secondResult = Diff(2.345, MyFunctionMethod);
}

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