未解决的参考:使用Kotlin的Eclipse中的pow [英] Unresolved reference: pow in Eclipse using Kotlin

问题描述

我正在尝试用Kotlin写一些小东西，但是在找到Double数字的二次幂时遇到了问题.

I'm trying to write something small in Kotlin and I'm having problems with finding the second power of a Double number.

根据此，Double应该实现接收另一个Double的pow函数，但是当我尝试使用此方法时，我得到了Unresolved reference: pow和一个错误.

According to this, Double should implement a pow function receiving another Double, but when I try using this method I get Unresolved reference: pow and an error.

这是我的示例代码:

fun main()
{
    val d: Double = 1.1;
    val d2: Double = d.pow(2.0); // Here's the error, on the token 'pow'.
    println(d2);
}

我找不到任何原因.此功能仅来自Kotlin 1.2，但是Eclipse Installation Details中的Kotlin记录显示Kotlin language support for Kotlin 1.2.50.

I can't find any reason to this. This feature is only from Kotlin 1.2, but the Kotlin record in the Eclipse Installation Details says Kotlin language support for Kotlin 1.2.50.

我在更新Kotlin插件之前创建了该项目，并且该项目可能是针对1.2之前的Kotlin版本创建的，但是我在任何地方的设置中都找不到更改已配置的Kotlin版本的信息，因此我假设使用的版本是该版本.已安装，即1.2.50.

I created the project before I updated the Kotlin plugin and it's possible the project was created for Kotlin version before 1.2 but I can't find in the settings anywhere to change the configured Kotlin version so I assume the used version is the one installed i.e. 1.2.50.

顺便说一句，Eclipse所显示的错误图标是灯泡1的错误，表明存在可用的解决方案，但是当我单击该图标时，却没有任何显示，这很奇怪.

By the way, the error icon Eclipse presents is the error with light bulb one, suggesting available solutions exist, but none show up when I click the icon, which is weird.

如果有人可以提出任何理由，那就太好了.
预先感谢.

If anyone could suggest any reason for this, it would be great.
Thanks in advance.

推荐答案

您需要将函数pow导入文件:

You need to import the function pow into your file:

import kotlin.math.*

我的完整代码:

import kotlin.math.pow

fun main(args: Array<String>)
{
    val d: Double = 1.1;
    val d2: Double = d.pow(2.0); // Here's the error, on the token 'pow'.
    println(d2);
}

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