c语言的头文件#include <limits.h>

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. 2

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)