C and C++ Integer Limits
Microsoft Specific
The limits for integer types in C and C++ are listed in the following table. These limits are defined in the C standard header file <limits.h>. The C++ Standard Library header <limits> includes <climits>, which includes <limits.h>.
Microsoft C also permits the declaration of sized integer variables, which are integral types of size 8-, 16-, 32- or 64-bits. For more information on sized integers in C, see Sized Integer Types.
Limits on Integer Constants
| Constant | Meaning | Value |
|---|---|---|
| CHAR_BIT | Number of bits in the smallest variable that is not a bit field. | 8 |
| SCHAR_MIN | Minimum value for a variable of type signed char. |
-128 |
| SCHAR_MAX | Maximum value for a variable of type signed char. |
127 |
| UCHAR_MAX | Maximum value for a variable of type unsigned char. |
255 (0xff) |
| CHAR_MIN | Minimum value for a variable of type char. |
-128; 0 if /J option used |
| CHAR_MAX | Maximum value for a variable of type char. |
127; 255 if /J option used |
| MB_LEN_MAX | Maximum number of bytes in a multibyte character. | 5 |
| SHRT_MIN | Minimum value for a variable of type short. |
-32768 |
| SHRT_MAX | Maximum value for a variable of type short. |
32767 |
| USHRT_MAX | Maximum value for a variable of type unsigned short. |
65535 (0xffff) |
| INT_MIN | Minimum value for a variable of type int. |
-2147483647 - 1 |
| INT_MAX | Maximum value for a variable of type int. |
2147483647 |
| UINT_MAX | Maximum value for a variable of type unsigned int. |
4294967295 (0xffffffff) |
| LONG_MIN | Minimum value for a variable of type long. |
-2147483647 - 1 |
| LONG_MAX | Maximum value for a variable of type long. |
2147483647 |
| ULONG_MAX | Maximum value for a variable of type unsigned long. |
4294967295 (0xffffffff) |
| LLONG_MIN | Minimum value for a variable of type long long. |
-9,223,372,036,854,775,807 - 1 |
| LLONG_MAX | Maximum value for a variable of type long long. |
9,223,372,036,854,775,807 |
| ULLONG_MAX | Maximum value for a variable of type unsigned long long. |
18,446,744,073,709,551,615 (0xffffffffffffffff) |
If a value exceeds the largest integer representation, the Microsoft compiler generates an error.
END Microsoft Specific