Question

能不能介绍下c语言中math.h中的函数的名称和功能？

Answer 1

int abs(int);//绝对值
//三角函数
double acos(double);
double asin(double);
double atan(double);
double atan2(double, double);
double cos(double);
double cosh(double);
double exp(double);
double fabs(double);
double fmod(double, double);
long labs(long);
double log(double);
double log10(double);
double pow(double, double);
double sin(double);
double sinh(double);
double tan(double);
double tanh(double);
double sqrt(double);

double atof(const char *);
double _cabs(struct _complex);//复数

double ceil(double);
double floor(double);

double frexp(double, int *);
double _hypot(double, double);
double _j0(double);
double _j1(double);
double _jn(int, double);
double ldexp(double, int);
int _matherr(struct _exception *);
double modf(double, double *);
double _y0(double);
double _y1(double);
double _yn(int, double);

Answer 2

math.h
The math header defines several mathematic functions. 

Functions: 

acos();
asin();
atan();
atan2();
ceil();
cos();
cosh();
exp();
fabs();
floor();
fmod();
frexp();
ldexp();
log();
log10();
modf();
pow();
sin();
sinh();
sqrt();
tan();
tanh();

都是数学计算