C++ 内置类型的最值宏定义

Richard

2019 年 10 月 18 日

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C++

有时候需要用到一些最值的宏定义，记录一下。

> 转载自 "https://blog.csdn.net/caroline_wendy/article/details/24311895"

!> 需包含头文件 climits

| name       | expresses                                                    | value*                                   |
| ---------- | ------------------------------------------------------------ | ---------------------------------------- |
| CHAR_BIT   | Number of bits in a char object (byte)                       | 8 or greater*                            |
| SCHAR_MIN  | Minimum value for an object of type signed char              | -127 (-27+1) or less*                    |
| SCHAR_MAX  | Maximum value for an object of type signed char              | 127 (27-1) or greater*                   |
| UCHAR_MAX  | Maximum value for an object of type unsigned char            | 255 (28-1) or greater*                   |
| CHAR_MIN   | Minimum value for an object of type char                     | either SCHAR_MIN or 0                    |
| CHAR_MAX   | Maximum value for an object of type char                     | either SCHAR_MAX or UCHAR_MAX            |
| MB_LEN_MAX | Maximum number of bytes in a multibyte character, for any locale | 1 or greater*                            |
| SHRT_MIN   | Minimum value for an object of type short int                | -32767 (-215+1) or less*                 |
| SHRT_MAX   | Maximum value for an object of type short int                | 32767 (215-1) or greater*                |
| USHRT_MAX  | Maximum value for an object of type unsigned short int       | 65535 (216-1) or greater*                |
| INT_MIN    | Minimum value for an object of type int                      | -32767 (-215+1) or less*                 |
| INT_MAX    | Maximum value for an object of type int                      | 32767 (215-1) or greater*                |
| UINT_MAX   | Maximum value for an object of type unsigned int             | 65535 (216-1) or greater*                |
| LONG_MIN   | Minimum value for an object of type long int                 | -2147483647 (-231+1) or less*            |
| LONG_MAX   | Maximum value for an object of type long int                 | 2147483647 (231-1) or greater*           |
| ULONG_MAX  | Maximum value for an object of type unsigned long int        | 4294967295 (232-1) or greater*           |
| LLONG_MIN  | Minimum value for an object of type long long int            | -9223372036854775807 (-263+1) or less*   |
| LLONG_MAX  | Maximum value for an object of type long long int            | 9223372036854775807 (263-1) or greater*  |
| ULLONG_MAX | Maximum value for an object of type unsigned long long int   | 18446744073709551615 (264-1) or greater* |

最后修改：2019 年 10 月 18 日