C++ language documentation - Data Type Ranges

╰+攻爆jí腚メ 2022-12-27 01:21 153阅读 0赞

# **C++ language documentation - Data Type Ranges** #

[https://docs.microsoft.com/en-us/][https_docs.microsoft.com_en-us]  
[https://docs.microsoft.com/zh-cn/][https_docs.microsoft.com_zh-cn]

**Microsoft documentation - Technical documentation**  
[https://docs.microsoft.com/en-us/documentation/][https_docs.microsoft.com_en-us_documentation]  
[https://docs.microsoft.com/zh-cn/documentation/][https_docs.microsoft.com_zh-cn_documentation]

**Microsoft C++, C, and Assembler documentation**  
[https://docs.microsoft.com/en-us/cpp/][https_docs.microsoft.com_en-us_cpp]  
[https://docs.microsoft.com/zh-cn/cpp/][https_docs.microsoft.com_zh-cn_cpp]

## 1. Languages and frameworks ##

![在这里插入图片描述][20201206210250145.png_pic_center]

## 2. C++ language documentation ##

[https://docs.microsoft.com/en-us/cpp/cpp/][https_docs.microsoft.com_en-us_cpp_cpp]  
[https://docs.microsoft.com/zh-cn/cpp/cpp/][https_docs.microsoft.com_zh-cn_cpp_cpp]

## 3. Data Type Ranges ##

[https://docs.microsoft.com/en-us/cpp/cpp/data-type-ranges][https_docs.microsoft.com_en-us_cpp_cpp_data-type-ranges]  
[https://docs.microsoft.com/zh-cn/cpp/cpp/data-type-ranges][https_docs.microsoft.com_zh-cn_cpp_cpp_data-type-ranges]  
Docs -> Microsoft C++, C, and Assembler C++ language -> C++ language reference -> Built-in types -> Data type ranges

The Microsoft C++ 32-bit and 64-bit compilers recognize the types in the table later in this article.  
Microsoft C++ 32 位和 64 位编译器可识别本文后面的表中的类型。

*  `int` (`unsigned int`)
 *  `__int8` (`unsigned __int8`)
 *  `__int16` (`unsigned __int16`)
 *  `__int32` (`unsigned __int32`)
 *  `__int64` (`unsigned __int64`)
 *  `short` (`unsigned short`)
 *  `long` (`unsigned long`)
 *  `long long` (`unsigned long long`)

If its name begins with two underscores (`__`), a data type is non-standard.  
如果其名称以两个下划线 (`__`) 开始，则数据类型是非标准的。

The ranges that are specified in the following table are `inclusive-inclusive`.  
下表中指定的范围均包含起始值和结束值。

Depending on how it’s used, a variable of `__wchar_t` designates either a wide-character type or multibyte-character type. Use the `L` prefix before a character or string constant to designate the wide-character-type constant.  
根据使用方式，变量 `__wchar_t` 指定宽字符类型或多字节字符类型。在字符或字符串常量之前使用 `L` 前缀来指定宽字符类型的常量。

`signed` and `unsigned` are modifiers that you can use with any integral type except `bool`. Note that `char`, `signed char`, and `unsigned char` are three distinct types for the purposes of mechanisms like overloading and templates.  
`signed` and `unsigned` 是可以与除 `bool` 以外的任何整数类型一起使用的修饰符。请注意，就重载和模板等机制而言，`char`, `signed char`, and `unsigned char` 是三种不同的类型。

The `int` and `unsigned int` types have a size of four bytes. However, portable code should not depend on the size of `int` because the language standard allows this to be implementation-specific.  
`int` and `unsigned int` 类型具有四个字节的大小。但是，可移植代码不应依赖于 `int` 的大小，因为语言标准允许它是特定于实现的。

C/C++ in Visual Studio also supports sized integer types. For more information, see `__int8`, `__int16`, `__int32`, `__int64` and Integer Limits.  
Visual Studio 中的 C/C++ 还支持按大小分类的整型。有关详细信息，请参阅 `__int8`, `__int16`, `__int32`, `__int64` 和整数限制。

For more information about the restrictions of the sizes of each type, see Built-in types.  
有关每种类型的大小限制的详细信息，请参阅内置类型。

The range of enumerated types varies depending on the language context and specified compiler flags. For more information, see C Enumeration Declarations and Enumerations.  
枚举类型的范围因语言上下文和指定的编译器标志而异。有关详细信息，请参阅 C 枚举声明和枚举。

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[https_docs.microsoft.com_en-us_documentation]: https://docs.microsoft.com/en-us/documentation/
[https_docs.microsoft.com_zh-cn_documentation]: https://docs.microsoft.com/zh-cn/documentation/
[https_docs.microsoft.com_en-us_cpp]: https://docs.microsoft.com/en-us/cpp/
[https_docs.microsoft.com_zh-cn_cpp]: https://docs.microsoft.com/zh-cn/cpp/
[20201206210250145.png_pic_center]: /images/20221120/9c7bf809229f4a6289a14ce0c9b9e0d9.png
[https_docs.microsoft.com_en-us_cpp_cpp]: https://docs.microsoft.com/en-us/cpp/cpp/
[https_docs.microsoft.com_zh-cn_cpp_cpp]: https://docs.microsoft.com/zh-cn/cpp/cpp/
[https_docs.microsoft.com_en-us_cpp_cpp_data-type-ranges]: https://docs.microsoft.com/en-us/cpp/cpp/data-type-ranges
[https_docs.microsoft.com_zh-cn_cpp_cpp_data-type-ranges]: https://docs.microsoft.com/zh-cn/cpp/cpp/data-type-ranges