不，这不会（我的理解）涉及整数除法或浮点舍入的问题。

And no, this does not (to my understanding) involve integer division or floating-point rounding issues.

我的确切code是：

    static void Main(string[] args)
    {
        double power = (double)1.0 / (double)7.0;
        double expBase = -128.0;
        System.Console.WriteLine("sanity check: expected: -128 ^ 0.142857142857143 = -2.    actual: " + expBase + " ^ " + power + " = " + Math.Pow(expBase, power));
        System.Console.ReadLine();
    }

的输出是：

完整性检查：预期：-128 ^ 0.142857142857143 = -2。实际：-128 ^ 0.14285 7142857143 = NaN的

sanity check: expected: -128 ^ 0.142857142857143 = -2. actual: -128 ^ 0.14285 7142857143 = NaN

目标框架此code为（根据溶液性质）.NET Framework 4.0客户端配置文件。

The Target Framework for this code is (according to solution properties) .NET Framework 4.0 Client Profile.

奇怪的是我没有找到任何提及此畅游网络世界中。我是不是疯了服用药丸来了！？

Strangely I haven't found any mention of this anywhere on the Web. Am I taking crazy pills here!?

推荐答案

好像是完全按照规定的;从的Math.Pow（）备注部分对战俘（X，Y）;

Seems to be exactly as specified; from the Math.Pow() remarks section on Pow(x,y);

参数   X - LT; 0但不NegativeInfinity; y不是整数，NegativeInfinity，或PositiveInfinity时

Parameters x < 0 but not NegativeInfinity; y is not an integer, NegativeInfinity, or PositiveInfinity.

结果 -   为NaN

Result NaN