在c#中,int和Int32是同一个东西,但我读过很多次int比Int32更受欢迎,没有给出原因。这是有原因的吗,我应该在意吗?


当前回答

虽然它们(大部分)是相同的(参见下面的一个[错误]差异),但您绝对应该注意并应该使用Int32。

The name for a 16-bit integer is Int16. For a 64 bit integer it's Int64, and for a 32-bit integer the intuitive choice is: int or Int32? The question of the size of a variable of type Int16, Int32, or Int64 is self-referencing, but the question of the size of a variable of type int is a perfectly valid question and questions, no matter how trivial, are distracting, lead to confusion, waste time, hinder discussion, etc. (the fact this question exists proves the point). Using Int32 promotes that the developer is conscious of their choice of type. How big is an int again? Oh yeah, 32. The likelihood that the size of the type will actually be considered is greater when the size is included in the name. Using Int32 also promotes knowledge of the other choices. When people aren't forced to at least recognize there are alternatives it become far too easy for int to become "THE integer type". The class within the framework intended to interact with 32-bit integers is named Int32. Once again, which is: more intuitive, less confusing, lacks an (unnecessary) translation (not a translation in the system, but in the mind of the developer), etc. int lMax = Int32.MaxValue or Int32 lMax = Int32.MaxValue? int isn't a keyword in all .NET languages. Although there are arguments why it's not likely to ever change, int may not always be an Int32.

缺点是要多输入两个字符和[bug]。

这不会编译

public enum MyEnum : Int32
{
    AEnum = 0
}

但这将:

public enum MyEnum : int
{
    AEnum = 0
}

其他回答

我知道最好的做法是使用int,所有MSDN代码都使用int。然而,据我所知,除了标准化和一致性之外,没有其他原因。

你不应该在意。如果大小是一个问题,我会使用字节,短,int,然后长。使用int型比int32大的唯一原因是需要一个大于2147483647或小于-2147483648的数。

除此之外,我不在乎,还有很多其他的事情需要关心。

int是一个c#关键字,是明确的。

大多数情况下,这并不重要,但有两件事与Int32相悖:

您需要有一个“using System;”语句。使用"int"不需要Using语句。 可以定义自己的名为Int32的类(这将是愚蠢和令人困惑的)。Int总是Int的意思。

你不应该关心大多数编程语言,除非你需要编写非常特定的数学函数,或者针对特定架构优化的代码……只要确保类型的大小足够你(例如,如果你知道你需要超过32位,就使用比Int更大的类型)

这两者确实是同义的;int看起来会更熟悉一些,Int32让那些阅读你的代码的人更清楚地看到32位。我倾向于在我只需要“一个整数”的地方使用int,在大小很重要的地方使用Int32(密码代码,结构),这样未来的维护者就会知道在适当的情况下扩大int是安全的,但应该注意以同样的方式改变Int32。

结果代码将是相同的:区别纯粹是可读性或代码外观。