catanh
计算复数的双曲反正切值。
接口定义
C interface：
float complex catanhf(float complex x);
double complex catanh(double complex x);
参数
参数名 |
类型 |
描述 |
输入/输出 |
|---|---|---|---|
x |
|
表示输入数据的浮点值。 |
输入 |
返回值
- 返回x的双曲反正切结果y。
- 特殊值说明如下所示。
输入值实部（x.real）
输入值虚部（x.imag）
输出值实部（y.real）
输出值虚部（y.imag）
inf
/
+0.0
/
-inf
/
-0.0
/
+0.0
nan
+0.0
nan
nan
±inf
+0.0
/
nan
非±inf
nan
nan
依赖
C: "km.h"
示例
C interface：
// typical usage
double x1 = 1.0, x2 = 2.0, x3 = 3.0, x4 = 4.0;
double complex cx1 = __builtin_complex(x1, x2);
double complex cx2 = __builtin_complex(x3, x4);
double complex cx3 = __builtin_complex(NAN, NAN);
double complex cx4 = __builtin_complex(INFINITY, -INFINITY);
// print result
double ry;
double iy;
ry = __real__ catanh(cx1);
iy = __imag__ catanh(cx1);
printf("catanh(cx1) = %.15f, %.15f\n", ry, iy);
ry = __real__ catanh(cx2);
iy = __imag__ catanh(cx2);
printf("catanh(cx2) = %.15f, %.15f\n", ry, iy);
ry = __real__ catanh(cx3);
iy = __imag__ catanh(cx3);
printf("catanh(cx3) = %.15f, %.15f\n", ry, iy);
ry = __real__ catanh(cx4);
iy = __imag__ catanh(cx4);
printf("catanh(cx4) = %.15f, %.15f\n", ry, iy);
result:
/*
* catanh(cx1) = 0.173286795139986, 1.178097245096172
* catanh(cx2) = 0.117500907311434, 1.409921049596575
* catanh(cx3) = nan, nan
* catanh(cx4) = 0.000000000000000, -1.570796326794897
*/
父主题： 复数函数
