int float double 各类型的最大值最小值
- //========================================================
- //type.cpp
- //by leo
- //5.13.2011
- //========================================================
- #include <iostream>
- #include <float.h>
- #include <iomanip>
- #include <limits.h>
- using namespace std;
- //--------------------------------------------------------
- int main()
- {
- cout << "int 类型能存储的最大值和最小值" << endl;
- cout << "INT_MAX = " << scientific << INT_MAX << endl;
- cout << "INT_MIN = " << scientific << INT_MIN << endl;
- cout << "long 类型能存储的最大值和最小值" << endl;
- cout << "LONG_MAX = " << scientific << LONG_MAX << endl;
- cout << "LONG_MIN = " << scientific << LONG_MIN << endl;
- cout << "float 类型能存储的最大值和最小值" << endl;
- cout << "FLT_MAX = " << FLT_MAX << endl;
- cout << "FLT_MIN = " << FLT_MIN << endl;
- cout << "double 类型能存储的最大值和最小值" << endl;
- cout << "DBL_MAX = " << DBL_MAX << endl;
- cout << "DBL_MIN = " << DBL_MIN << endl;
- return 0;
- }
- //========================================================
- vc6.0//vc98/Include
- /***
- *limits.h - implementation dependent values
- *
- * Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
- *
- *Purpose:
- * Contains defines for a number of implementation dependent values
- * which are commonly used in C programs.
- * [ANSI]
- *
- * [Public]
- *
- ****/
- #if _MSC_VER > 1000
- #pragma once
- #endif
- #ifndef _INC_LIMITS
- #define _INC_LIMITS
- #if !defined(_WIN32) && !defined(_MAC)
- #error ERROR: Only Mac or Win32 targets supported!
- #endif
- #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 /* _CHAR_UNSIGNED */
- #define MB_LEN_MAX 2 /* 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 */
- #if _INTEGRAL_MAX_BITS >= 8
- #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 */
- #endif
- #if _INTEGRAL_MAX_BITS >= 16
- #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 */
- #endif
- #if _INTEGRAL_MAX_BITS >= 32
- #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 */
- #endif
- #if _INTEGRAL_MAX_BITS >= 64
- /* 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
- #endif
- #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
- #ifdef _POSIX_
- #define _POSIX_ARG_MAX 4096
- #define _POSIX_CHILD_MAX 6
- #define _POSIX_LINK_MAX 8
- #define _POSIX_MAX_CANON 255
- #define _POSIX_MAX_INPUT 255
- #define _POSIX_NAME_MAX 14
- #define _POSIX_NGROUPS_MAX 0
- #define _POSIX_OPEN_MAX 16
- #define _POSIX_PATH_MAX 255
- #define _POSIX_PIPE_BUF 512
- #define _POSIX_SSIZE_MAX 32767
- #define _POSIX_STREAM_MAX 8
- #define _POSIX_TZNAME_MAX 3
- #define ARG_MAX 14500 /* 16k heap, minus overhead */
- #define LINK_MAX 1024
- #define MAX_CANON _POSIX_MAX_CANON
- #define MAX_INPUT _POSIX_MAX_INPUT
- #define NAME_MAX 255
- #define NGROUPS_MAX 16
- #define OPEN_MAX 32
- #define PATH_MAX 512
- #define PIPE_BUF _POSIX_PIPE_BUF
- #define SSIZE_MAX _POSIX_SSIZE_MAX
- #define STREAM_MAX 20
- #define TZNAME_MAX 10
- #endif /* POSIX */
- #endif /* _INC_LIMITS */