#inlcude <limits.h> 其中有定义如下 #define MB_LEN_MAX 5 /* max. # bytes in multibyte char */ #define SHRT_MIN (-32768) /* minimum (signed) short value */ #define SHRT_MAX 32767 /* maximum (signed) short value */ #define USHRT_MAX 0xffff /* maximum unsigned short value */ #define INT_MIN (-2147483647 - 1) /* minimum (signed) int value */ #define INT_MAX 2147483647 /* maximum (signed) int value */ #define UINT_MAX 0xffffffff /* maximum unsigned int value */ #define LONG_MIN (-2147483647L - 1) /* minimum (signed) long value */ #define LONG_MAX 2147483647L /* maximum (signed) long value */ #define ULONG_MAX 0xffffffffUL /* maximum unsigned long value */ #define LLONG_MAX 9223372036854775807i64 /* maximum signed long long int value */ #define LLONG_MIN (-9223372036854775807i64 - 1) /* minimum signed long long int value */ #define ULLONG_MAX 0xffffffffffffffffui64 /* maximum unsigned long long int value */ 不同的软硬件环境下这些值会变化 一切以 limits.h 为准
第4个回答 2013-11-10
如果是32位的int可以存放2的31次方等于2147483647~-2147483647 如果用超过这个范围的数,可以用long int