/* math.h
Definitions for the math floating point package.
Copyright (c) Borland International 1987,1988 All Rights Reserved. */ #if __STDC__ #define _Cdecl #else #define _Cdecl cdecl #endif
#ifndef _MATH_H #define _MATH_H 1
#define EDOM 33 /* Math argument */ #define ERANGE 34 /* Result too large */
#define HUGE_VAL _huge_dble extern double _Cdecl _huge_dble;
int _Cdecl abs (int x); double _Cdecl acos (double x); double _Cdecl asin (double x); double _Cdecl atan (double x); double _Cdecl atan2 (double y, double x); double _Cdecl atof (const char *s); double _Cdecl ceil (double x); double _Cdecl cos (double x); double _Cdecl cosh (double x); double _Cdecl exp (double x); double _Cdecl fabs (double x); double _Cdecl floor (double x); double _Cdecl fmod (double x, double y); double _Cdecl frexp (double x, int *exponent); long _Cdecl labs (long x); double _Cdecl ldexp (double x, int exponent); double _Cdecl log (double x); double _Cdecl log10 (double x); double _Cdecl modf (double x, double *ipart); double _Cdecl pow (double x, double y); double _Cdecl sin (double x); double _Cdecl sinh (double x); double _Cdecl sqrt (double x); double _Cdecl tan (double x); double _Cdecl tanh (double x);
struct exception { int type; char *name; double arg1, arg2, retval; };
int _Cdecl matherr (struct exception *e);
#if !__STDC__ double cdecl hypot (double x, double y); double cdecl poly (double x, int degree, double coeffs []); double cdecl pow10 (int p);
struct complex /* as used by "cabs" function */ { double x, y; };
#define cabs(z) (hypot ((z).x, (z).y))
/* The customary matherr() exception handler for maths functions is not compatible with the x3j11 draft standard for C. _matherr() is provided as a compromise. */
typedef enum { DOMAIN = 1, /* argument domain error -- log (-1) */ SING, /* argument singularity -- pow (0,-2)) */ OVERFLOW, /* overflow range error -- exp (1000) */ UNDERFLOW, /* underflow range error -- exp (-1000) */ TLOSS, /* total loss of significance -- sin(10e70) */ PLOSS, /* partial loss of signif. -- not used */ } _mexcep;
double _Cdecl _matherr (_mexcep why, char *fun, double *arg1p, double *arg2p, double retval);
/* Constants rounded for 21 decimals. */ #define M_E 2.71828182845904523536 #define M_LOG2E 1.44269504088896340736 #define M_LOG10E 0.434294481903251827651 #define M_LN2 0.693147180559945309417 #define M_LN10 2.30258509299404568402 #define M_PI 3.14159265358979323846 #define M_PI_2 1.57079632679489661923 #define M_PI_4 0.785398163397448309116 #define M_1_PI 0.318309886183790671538 #define M_2_PI 0.636619772367581343076 #define M_1_SQRTPI 0.564189583547756286948 #define M_2_SQRTPI 1.12837916709551257390 #define M_SQRT2 1.41421356237309504880 #define M_SQRT_2 0.707106781186547524401
#endif /* __STDC__ */
#endif 谁能解释下~~~~~~看到我都晕了
