float.h

eC++编译器源码

#pragma float

const unsigned int FLT_DIG  =   6;           /* # of decimal digits of precision */
const float FLT_EPSILON= 1.192092896e-07;    /* smallest such that 1.0+FLT_EPSILON != 1.0 */
const unsigned int FLT_GUARD =  0;
const unsigned int FLT_MANT_DIG =   24;          /* # of bits in mantissa */
const float FLT_MAX  =   3.402823466e+38;    /* max value */
const unsigned int FLT_MAX_10_EXP = 38;          /* max decimal exponent */
const unsigned int FLT_MAX_EXP= 128;         /* max binary exponent */
const float FLT_MIN  =   1.175494351e-38;    /* min positive value */
const unsigned int FLT_MIN_10_EXP=  (-37);           /* min decimal exponent */
const unsigned int FLT_MIN_EXP= (-125);          /* min binary exponent */
const unsigned int FLT_NORMALIZE =  0;
const unsigned int FLT_RADIX =  2;           /* exponent radix */
const unsigned int FLT_ROUNDS = 1;           /* addition rounding: near */