int float double 最大值，最小值
1. 显示整型(int)的最小、最大值:
#include <stdio.h>
#include <limits.h>
int main(void)
{
int n1,n2;
n1 = INT_MIN;
n2 = INT_MAX;
printf("%d .. %d", n1,n2);
getchar();
return 0;
}
2. 显示单精度类型(float)的最小、最大值:
#include <stdio.h>
#include <float.h>
int main(void)
{
float f1 = FLT_MIN;
float f2 = FLT_MAX;
printf("%e .. %e ", f1,f2);
getchar();
return 0;
}
3. 显示双精度类型(double)的最小、最大值:
#include <stdio.h>
#include <float.h>
int main(void)
{
double d1 = DBL_MIN;
double d2 = DBL_MAX;
printf("%e .. %e ", d1,d2);
getchar();
return 0;
}
附：
\Microsoft Visual Studio\VC98\Include\LIMITS.H中定义的：
#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
\Microsoft Visual Studio\VC98\Include\FLOAT.H中定义：
#define DBL_DIG 15 /* # of decimal digits of precision */
#define DBL_EPSILON 2.2204460492503131e-016 /* smallest such that 1.0+DBL_EPSILON != 1.0 */
#define DBL_MANT_DIG 53 /* # of bits in mantissa */
#define DBL_MAX 1.7976931348623158e+308 /* max value */
#define DBL_MAX_10_EXP 308 /* max decimal exponent */
#define DBL_MAX_EXP 1024 /* max binary exponent */
#define DBL_MIN 2.2250738585072014e-308 /* min positive value */
#define DBL_MIN_10_EXP (-307) /* min decimal exponent */
#define DBL_MIN_EXP (-1021) /* min binary exponent */
#define _DBL_RADIX 2 /* exponent radix */
#define _DBL_ROUNDS 1 /* addition rounding: near */
#define FLT_DIG 6 /* # of decimal digits of precision */
#define FLT_EPSILON 1.192092896e-07F /* smallest such that 1.0+FLT_EPSILON != 1.0 */
#define FLT_GUARD 0
#define FLT_MANT_DIG 24 /* # of bits in mantissa */
#define FLT_MAX 3.402823466e+38F /* max value */
#define FLT_MAX_10_EXP 38 /* max decimal exponent */
#define FLT_MAX_EXP 128 /* max binary exponent */
#define FLT_MIN 1.175494351e-38F /* min positive value */
#define FLT_MIN_10_EXP (-37) /* min decimal exponent */
#define FLT_MIN_EXP (-125) /* min binary exponent */
#define FLT_NORMALIZE 0
#define FLT_RADIX 2 /* exponent radix */
#define FLT_ROUNDS 1 /* addition rounding: near */
#ifndef _M_M68K
#define LDBL_DIG DBL_DIG /* # of decimal digits of precision */
#define LDBL_EPSILON DBL_EPSILON /* smallest such that 1.0+LDBL_EPSILON != 1.0 */
#define LDBL_MANT_DIG DBL_MANT_DIG /* # of bits in mantissa */
#define LDBL_MAX DBL_MAX /* max value */
#define LDBL_MAX_10_EXP DBL_MAX_10_EXP /* max decimal exponent */
#define LDBL_MAX_EXP DBL_MAX_EXP /* max binary exponent */
#define LDBL_MIN DBL_MIN /* min positive value */
#define LDBL_MIN_10_EXP DBL_MIN_10_EXP /* min decimal exponent */
#define LDBL_MIN_EXP DBL_MIN_EXP /* min binary exponent */
#define _LDBL_RADIX DBL_RADIX /* exponent radix */
#define _LDBL_ROUNDS DBL_ROUNDS /* addition rounding: near */
#else
#define LDBL_DIG 18 /* # of decimal digits of precision */
#define LDBL_EPSILON 1.08420217248550443412e-019L /* smallest such that 1.0+LDBL_EPSILON != 1.0 */
#define LDBL_MANT_DIG 64 /* # of bits in mantissa */
#define LDBL_MAX 1.189731495357231765e+4932L /* max value */
#define LDBL_MAX_10_EXP 4932 /* max decimal exponent */
#define LDBL_MAX_EXP 16384 /* max binary exponent */
#define LDBL_MIN 3.3621031431120935063e-4932L /* min positive value */
#define LDBL_MIN_10_EXP (-4931) /* min decimal exponent */
#define LDBL_MIN_EXP (-16381) /* min binary exponent */
#define _LDBL_RADIX 2 /* exponent radix */
#define _LDBL_ROUNDS 1 /* addition rounding: near */
#endif
引自：http://hi.baidu.com/%CD%E6%CA%AF%CD%B7%B5%C4%D0%A1%BA%A2/blog/item/5d8480c64ee2ead6d0006052.html
浙公网安备 33010602011771号