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   csqrt    ( 3 )

комплексный квадратный корень (complex square root)

Имя (Name)

csqrt, csqrtf, csqrtl - complex square root


Синопсис (Synopsis)

#include <complex.h>

double complex csqrt(double complex z); float complex csqrtf(float complex z); long double complex csqrtl(long double complex z);

Link with -lm.


Описание (Description)

These functions calculate the complex square root of z, with a branch cut along the negative real axis. (That means that csqrt(-1+eps*I) will be close to I while csqrt(-1-eps*I) will be close to -I, if eps is a small positive real number.)


Версии (Versions)

These functions first appeared in glibc in version 2.1.


Атрибуты (Attributes)

For an explanation of the terms used in this section, see attributes(7).

┌──────────────────────────────────────┬───────────────┬─────────┐ │Interface Attribute Value │ ├──────────────────────────────────────┼───────────────┼─────────┤ │csqrt(), csqrtf(), csqrtl() │ Thread safety │ MT-Safe │ └──────────────────────────────────────┴───────────────┴─────────┘


Стандарты (Conforming to)

C99, POSIX.1-2001, POSIX.1-2008.


Смотри также (See also)

cabs(3), cexp(3), complex(7)