C++ Integer Limits
The latest version of this topic can be found at C++ Integer Limits.
Microsoft Specific**
The limits for integer types are listed in the following table. These limits are defined in the standard header file LIMITS.H. Microsoft C also permits the declaration of sized integer variables, which are integral types of size 8-, 16-, or 32-bits. For more information on sized integers, 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 multicharacter constant. | 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) |
If a value exceeds the largest integer representation, the Microsoft compiler generates an error.
END Microsoft Specific