1、三角函數(shù)
double sin (double);正弦
double cos (double);余弦
double tan (double);正切
2 潮针、反三角函數(shù)
double asin (double); 結(jié)果介于[-PI/2, PI/2]
double acos (double); 結(jié)果介于[0, PI]
double atan (double); 反正切(主值), 結(jié)果介于[-PI/2, PI/2]
double atan2 (double, double); 反正切(整圓值), 結(jié)果介于[-PI, PI]
3 、雙曲三角函數(shù)
double sinh (double);
double cosh (double);
double tanh (double);
4 、指數(shù)與對(duì)數(shù)
double exp (double);求取自然數(shù)e的冪
double sqrt (double);開(kāi)平方
double log (double); 以e為底的對(duì)數(shù)
double log10 (double);以10為底的對(duì)數(shù)
double pow(double x, double y）;計(jì)算以x為底數(shù)的y次冪
float powf(float x, float y); 功能與pow一致滚婉，只是輸入與輸出皆為浮點(diǎn)數(shù)
5 、取整
double ceil (double); 取上整
double floor (double); 取下整
6 吨拗、絕對(duì)值
int abs(int);
double fabs (double);求絕對(duì)值
double cabs(struct complex znum) ;求復(fù)數(shù)的絕對(duì)值
7 满哪、標(biāo)準(zhǔn)化浮點(diǎn)數(shù)
double frexp (double f, int *p); 標(biāo)準(zhǔn)化浮點(diǎn)數(shù), f = x * 2^p, 已知f求x, p ( x介于[0.5, 1] )
double ldexp (double x, int p); 與frexp相反, 已知x, p求f
8 、取整與取余
double modf (double, double*); 將參數(shù)的整數(shù)部分通過(guò)指針回傳, 返回小數(shù)部分
double fmod (double, double); 返回兩參數(shù)相除的余數(shù)
9 劝篷、其他
double hypot(double x, double y);已知直角三角形兩個(gè)直角邊長(zhǎng)度哨鸭，求斜邊長(zhǎng)度
double ldexp(double x, int exponent);計(jì)算x*(2的exponent次冪)
double poly(double x, int degree, double coeffs [] );計(jì)算多項(xiàng)式
nt matherr(struct exception *e);數(shù)學(xué)錯(cuò)誤計(jì)算處理程序
