一些字母后，又是什么叫什么？ [英] Letter after a number, what is it called?

问题描述

这是什么叫做

double  d1 = 0d;
decimal d2 = 0L;
float   d3 = 0f;

和我在哪里可以找到我的字符可以使用的参考？如果我想投 0 到短，我需要这封信？

And where can I find a reference of characters I can use? If I want to cast 0 to short, which letter I need?

推荐答案

最好的来源是C＃规范（这是在第2.4.4字面在第4版）。

The best source is the C# specification (it's in section "2.4.4. Literals" in version 4).

的相关位：

类型字面如下确定的整数：

The type of an integer literal is determined as follows:

• 如果文字没有后缀，它的第一个这种类型中，它的价值可以表示的：INT，UINT，长，ULONG

。
• 如果文字是接U或u后缀，它的第一个这种类型中，它的价值可以表示的：UINT，ULONG


• 如果文字是用L后缀或L，它的第一个这种类型中，它的价值可以表示的：长，ULONG


• 如果文字是通过UL认证，UL认证，UL认证，UL，LU，鲁后缀，鲁，或LU，它是ulong类型。

• If the literal has no suffix, it has the first of these types in which its value can be represented: int, uint, long, ulong.
• If the literal is suffixed by U or u, it has the first of these types in which its value can be represented: uint, ulong.
• If the literal is suffixed by L or l, it has the first of these types in which its value can be represented: long, ulong.
• If the literal is suffixed by UL, Ul, uL, ul, LU, Lu, lU, or lu, it is of type ulong.

如果没有指定实型后缀，真正的类型文字是双。否则，实类型后缀决定了实数的类型，如下所示：

If no real-type-suffix is specified, the type of the real literal is double. Otherwise, the real type suffix determines the type of the real literal, as follows:

• 一个实数以F或f为后缀是float类型。 [...]

• A real literal suffixed by F or f is of type float. […]

一个实数由D或D后缀是double类型。 [...]

A real literal suffixed by D or d is of type double. […]

一个实数以M或m为后缀类型小数。 [...]

A real literal suffixed by M or m is of type decimal. […]

这意味着字母（或字母）被称为后缀。有没有办法来表示短这样，所以你必须使用（短）0 ，或只是短的X = 0;

That means the letter (or letters) is called "suffix". There is no way to represent short this way, so you have to use (short)0, or just short x = 0;.

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