int float double 各型別的最大值最小值

//======================================================== //type.cpp //by leo //5.13.2011 //======================================================== #include <iostream> #include <float.h> #include <iomanip> #include <limits.h> using namespace std; //-------------------------------------------------------- int main() { cout << "int 型別能儲存的最大值和最小值" << endl; cout << "INT_MAX = " << scientific << INT_MAX << endl; cout << "INT_MIN = " << scientific << INT_MIN << endl; cout << "long 型別能儲存的最大值和最小值" << endl; cout << "LONG_MAX = " << scientific << LONG_MAX << endl; cout << "LONG_MIN = " << scientific << LONG_MIN << endl; cout << "float 型別能儲存的最大值和最小值" << endl; cout << "FLT_MAX = " << FLT_MAX << endl; cout << "FLT_MIN = " << FLT_MIN << endl; cout << "double 型別能儲存的最大值和最小值" << 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 */