使用枚举作为int是一个好习惯吗？ [英] Is it a good practice to use enum as int?

问题描述

所以我在一个类中有一个变量state。我想把它声明为整数，所以我可以保存一些if语句。

  int state; 
  

一种方法是声明枚举状态{One = 0，Two = 1，Three = 3}，然后在switch语句中，它将成为：

  switch（state）
 {
案例一：
 dosomething（）; 
 break; 
案例二：
 dosomething（）; 
 break; 
 case三：
 dosomething（）; 
 break; 
} 
  

那么，这样使用枚举是一个好习惯吗？
有更好的方法吗？

谢谢！

解决方案

是的，这是一个很好的方法。您通常使用枚举使生活更轻松，许多不同的数字并不真的告诉其他编码人员什么都不是很有用。

所以这是一个非常好的使用方法，它使您的代码可读和可理解。

Altough as @James McNellis指出，命名你的枚举像1,2,3,4是一个坏主意，因为它不能表达真正的作用。

但我怀疑这只是一个

请考虑这一点：

  switch operationState）
 {
 case等待：
 dosomething（）; 
 break; 
 case运行：
 dosomething（）; 
 break; 
 case已结束：
 dosomething（）; 
 break; 
} 
  

在这种情况下，操作是：等待，运行或结束，这使它可读和可理解。现在考虑没有枚举的方式：

  switch（iState）
 {
 case 997：
 dosomething（）; 
 break; 
 case 998：
 dosomething（）; 
 break; 
案例999：
 dosomething（）; 
 break; 
} 
  

997告诉你什么？绝对没有！使用可读和可理解的代码，使每个人的生活更轻松。

So, I have a variable "state" in a class. I want to declare it as an integer so I can save some if statements.

int state;

One way to do this is to declare an enum State {One = 0, Two = 1, Three = 3}, and then in the switch statement, it would become:

switch (state)
{
case One:
    dosomething();
    break;
case Two:
    dosomething();
    break;
case Three:
    dosomething();
    break;
}

So, is it a good practice to use enum like this? Is there a better way to do this?

Thanks!

解决方案

Yes that is a good way to do it. You generally use enums to make life easier, a lot of different numbers that don't really tell other coders anything isn't quite helpful.

So this is a perfectly good way of using it, it makes your code readable and understandable.

Altough as @James McNellis pointed out, naming your enums like "1,2,3,4" is a bad idea, since it doesn't express what it really does.

But I suspect that was only an example from your side.

Consider this instead:

switch (operationState)
{
    case Waiting:
        dosomething();
        break;
    case Running:
        dosomething();
        break;
    case Ended:
        dosomething();
        break;
}

In this case, the "operation" is either: Waiting, Running or Ended, which makes it readable and understandable. Now consider the way without enums:

switch (iState)
{
    case 997:
        dosomething();
        break;
    case 998:
        dosomething();
        break;
    case 999:
        dosomething();
        break;
}

What does 997 tell you? Absolutely Nothing! Use readable and understandable code to make everyones life easier.

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