13.8 <climits>
The <climits> header (from the C standard < limits.h> header) defines parameters that characterize integral types in the same way <cfloat> does for the floating point types. The native C++ header, <limits> , defines the same information (and more) using templates instead of macros.
The types used in the descriptions of the _MIN and _MAX macros are meant as reminders and are not descriptive of the actual types of the macro expansions. The actual types are implementation-defined and can be any integral type that would be the result of normal integral promotions for the corresponding typee.g., if unsigned char is promoted to int , UCHAR_MAX might have type int .
All of the macros in <climits> expand to constant expressions.
| CHAR_BIT macro | Bits per character |
Number of bits per character. The value is always at least 8.
| CHAR_MAX macro | Maximum char value |
Maximum value for the char type. (Remember that the char type is the same as either signed char or unsigned char , so CHAR_MAX has the same value as SCHAR_MAX or UCHAR_MAX .)
See Also
WCHAR_MAX in <cwchar>
| CHAR_MIN macro | Minimum char value |
Minimum value for the char type (the same value as SCHAR_MIN or ).
See Also
WCHAR_MIN in <cwchar>
| INT_MAX macro | Maximum int value |
Maximum value for the int type. The value is always at least 32,767.
| INT_MIN macro | Minimum int value |
Minimum value for the int type. The value is always less than or equal to -32,767.
| LONG_MAX macro | Maximum long value |
Maximum value for the long int type. The value is always at least 2,147,483,647.
| LONG_MIN macro | Minimum long value |
Minimum value for the long int type. The value is always less than or equal to -2,147,483,647.
| MB_LEN_MAX macro | Maximum bytes in a multibyte character |
Maximum number of bytes in any multibyte character, in any locale. The value is always at least 1.
| SCHAR_MAX macro | Maximum signed char value |
Maximum value for the signed char type. The value is always at least 127.
| SCHAR_MIN macro | Minimum signed char value |
Minimum value for the signed char type. The value is always less than or equal to -127.
| SHRT_MAX macro | Maximum short value |
Maximum value for the short type. The value is always at least 32,767.
| SHRT_MIN macro | Minimum short value |
Minimum value for the short type. The value is always less than or equal to -32,767.
| UCHAR_MAX macro | Maximum unsigned char value |
Maximum value for the unsigned char type. The value is always at least 255.
| UINT_MAX macro | Maximum unsigned int value |
Maximum value for the unsigned int type. The value is always at least 65,535.
| ULONG_MAX macro | Maximum unsigned long value |
Maximum value for the unsigned long type. The value is always at least 4,294,967,295.
| USHRT_MAX macro | Maximum unsigned short value |
Maximum value for the unsigned short type. The value is always at least 65,535.
