想不出骚话的一天,很难过

基础库提供limits.h,定义了C++基本数据类型最大最小值
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//
// limits.h
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// The C Standard Library <limits.h> header.
//
#pragma once
#define _INC_LIMITS

#include <vcruntime.h>

_CRT_BEGIN_C_HEADER



#define CHAR_BIT 8 // number of bits in a char
#define SCHAR_MIN (-128) // minimum signed char value
#define SCHAR_MAX 127 // maximum signed char value
#define UCHAR_MAX 0xff // maximum unsigned char value

#ifndef _CHAR_UNSIGNED
#define CHAR_MIN SCHAR_MIN // mimimum char value
#define CHAR_MAX SCHAR_MAX // maximum char value
#else
#define CHAR_MIN 0
#define CHAR_MAX UCHAR_MAX
#endif

#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

#define _I8_MIN (-127i8 - 1) // minimum signed 8 bit value
#define _I8_MAX 127i8 // maximum signed 8 bit value
#define _UI8_MAX 0xffui8 // maximum unsigned 8 bit value

#define _I16_MIN (-32767i16 - 1) // minimum signed 16 bit value
#define _I16_MAX 32767i16 // maximum signed 16 bit value
#define _UI16_MAX 0xffffui16 // maximum unsigned 16 bit value

#define _I32_MIN (-2147483647i32 - 1) // minimum signed 32 bit value
#define _I32_MAX 2147483647i32 // maximum signed 32 bit value
#define _UI32_MAX 0xffffffffui32 // maximum unsigned 32 bit value

// minimum signed 64 bit value
#define _I64_MIN (-9223372036854775807i64 - 1)
// maximum signed 64 bit value
#define _I64_MAX 9223372036854775807i64
// maximum unsigned 64 bit value
#define _UI64_MAX 0xffffffffffffffffui64

#if _INTEGRAL_MAX_BITS >= 128
// minimum signed 128 bit value
#define _I128_MIN (-170141183460469231731687303715884105727i128 - 1)
// maximum signed 128 bit value
#define _I128_MAX 170141183460469231731687303715884105727i128
// maximum unsigned 128 bit value
#define _UI128_MAX 0xffffffffffffffffffffffffffffffffui128
#endif

#ifndef SIZE_MAX
#ifdef _WIN64
#define SIZE_MAX _UI64_MAX
#else
#define SIZE_MAX UINT_MAX
#endif
#endif

#if __STDC_WANT_SECURE_LIB__
#ifndef RSIZE_MAX
#define RSIZE_MAX (SIZE_MAX >> 1)
#endif
#endif



_CRT_END_C_HEADER