两个枚举​​有一些共同的元素，为什么会产生这样的错误？ [英] Two enums have some elements in common, why does this produce an error?

问题描述

我有两个枚举在我的code：

I have two enums in my code:

enum Month {January, February, March, April, May, June, July,
        August, September, October, November, December};
enum ShortMonth {Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec};

月在两个枚举一个共同的元素，所以编译器说：

May is a common element in both enums, so the compiler says:

的枚举的重新说明月 的

为什么会这么说？我怎么能绕过这个？

Why does it say so? And how can I circumvent this?

推荐答案

枚举名字在全球范围内，他们必须是唯一的。请记住，你不需要用enum名限定的枚举符号，你做到这：

Enum names are in global scope, they need to be unique. Remember that you don't need to qualify the enum symbols with the enum name, you do just:

Month xmas = December;

不是

Month xmas = Month.December;  /* This is not C. */

由于这个原因，你经常看到有人prefixing用枚举的名字符号名称：

For this reason, you often see people prefixing the symbol names with the enum's name:

enum Month { Month_January, Month_February, /* and so on */ };

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