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你好，請教一下c語言中math頭文件中的函數(shù)有哪些？

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元芳怎么了 2021-02-02 16:07:59

c語言中math頭文件中的函數(shù)有哪些

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牧羊人nacy

TA貢獻(xiàn)1862條經(jīng)驗獲得超7個贊

數(shù)學(xué)函數(shù)庫,一些數(shù)學(xué)計算的公式的具體實現(xiàn)是放在math.h里,具體有：
1 三角函數(shù)
double sin (double);
double cos (double);
double tan (double);
2 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/2, PI/2]
3 雙曲三角函數(shù)
double sinh (double);
double cosh (double);
double tanh (double);
4 指數(shù)與對數(shù)
double exp (double);
double sqrt (double);
double log (double); 以e為底的對數(shù)
double log10 (double);
double pow(double x, double y)//計算以x為底數(shù)的y次冪
5 取整
double ceil (double); 取上整
double floor (double); 取下整
6 絕對值
double fabs (double);
double cabs(struct complex znum) //求復(fù)數(shù)的絕對值
7 標(biāo)準(zhǔn)化浮點數(shù)
double frexp (double f, int *p); 標(biāo)準(zhǔn)化浮點數(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其他
double hypot(double x, double y);//已知直角三角形兩個直角邊長度，求斜邊長度
double ldexp(double x, int exponent);//計算x*(2的exponent次冪)
double poly(double x, int degree, double coeffs [] )//計算多項式
nt matherr(struct exception *e)//數(shù)學(xué)錯誤計算處理程序
source: 《C & C++ Code Capsules》

反對回復(fù) 2021-03-28

aluckdog

TA貢獻(xiàn)1847條經(jīng)驗獲得超7個贊

你自己可以打開那個文件看看那
用記事本程序
可以看到
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);
這些，后面就是常用的函數(shù)名