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HP-UX Reference > Ccsqrt(3M)HP Integrity Server OnlyHP-UX 11i Version 3: February 2007 |
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NAMEcsqrt(), csqrtf(), csqrtl(), csqrtw(), csqrtq() — complex square root functions SYNOPSIS#include <complex.h> double complex csqrt(double complex z); float complex csqrtf(float complex z); long double complex csqrtl(long double complex z); extended complex csqrtw(extended complex z); quad complex csqrtq(quad complex z); DESCRIPTIONThese functions are available only for Integrity servers. csqrt() returns the complex square root of z in the range of the right half-plane (including the imaginary axis). There is a branch cut along the negative real axis. csqrtf() is a float complex version of csqrt(); it takes a float complex argument and returns a float complex result. csqrtl() is a long double complex version of csqrt(); it takes a long double complex argument and returns a long double complex result. csqrtw() is an extended complex version of csqrt(); it takes an extended complex argument and returns an extended complex result. csqrtq() is equivalent to csqrtl() on HP-UX systems. USAGETo use these functions, compile with the default -Ae option. To use csqrtw() or csqrtq(), compile with the -fpwidetypes option. Make sure your program includes <complex.h>. Link in the math library by specifying -lm on the compiler or linker command line. RETURN VALUEcsqrt(conj(z)) = conj(csqrt(z)). csqrt(±0+i0) returns +0+i0. csqrt(x+iInf) returns +Inf+iInf, for all x (including NaN). csqrt(x+iNaN) returns NaN+iNaN and optionally raises the invalid floating-point exception, for finite x. csqrt(-Inf+iy) returns +0+iInf, for finite positive-signed y. csqrt(+Inf+iy) returns +Inf+i0, for finite positive-signed y. csqrt(-Inf+iNaN) returns NaN±iInf (where the sign of the imaginary part of the result is unspecified). csqrt(+Inf+iNaN) returns +Inf+iNaN. csqrt(NaN+iy) returns NaN+iNaN and optionally raises the invalid floating-point exception, for finite y. csqrt(NaN+iNaN) returns NaN+iNaN. |
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