c++ 内置宏

最新推荐文章于 2024-05-08 08:51:11 发布

Nicholas_Liu2017

最新推荐文章于 2024-05-08 08:51:11 发布

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内置类型的最大值宏定义

本文地址: http://blog.csdn.NET/caroline_wendy/article/details/24311895

C++中, 经常会使用, 某些类型的最大值, 如int的最大整数(INT_MAX), C的函数中, 包含了这些宏定义.

头文件: #include <climits>

具体参见:

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*