csqrt(3M) Mathematical Library Functions csqrt(3M)NAME
csqrt, csqrtf, csqrtl - complex square root functions
SYNOPSIS
c99 [ flag... ] file... -lm [ library... ]
#include <complex.h>
double complex csqrt(double complex z);
float complex csqrtf(float complex z);
long double complex csqrtl(long double complex z);
DESCRIPTION
These functions compute the complex square root of z, with a branch cut along the negative real axis.
RETURN VALUES
These functions return the complex square root value, in the range of the right half-plane (including the imaginary axis).
ERRORS
No errors are defined.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO cabs(3M), complex.h(3HEAD), cpow(3M), attributes(5), standards(5)SunOS 5.11 12 Jul 2006 csqrt(3M)
Check Out this Related Man Page
CSQRT(3) BSD Library Functions Manual CSQRT(3)NAME
csqrt -- complex square root function
SYNOPSIS
#include <complex.h>
double complex
csqrt(double complex z);
long double complex
csqrtl(long double complex z);
float complex
csqrtf(float complex z);
DESCRIPTION
csqrt(z) computes the square root of the complex floating-point number z, with a branch cut on the negative real axis. The result is in the
right half-plane, including the imaginary axis. For all complex z, csqrt(conj(z)) = conj(csqrt(z)).
SPECIAL VALUES
The conjugate symmetry of csqrt() is used to abbreviate the specification of special values.
csqrt(+-0 + 0i) returns +0 + 0i.
csqrt(x + inf i) returns inf + inf i for all x (including NaN).
csqrt(x + NaN i) returns NaN + NaN i.
csqrt(-inf + yi) returns 0 + inf i for any positively-signed finite y.
csqrt(inf + yi) returns inf + 0i for any positively-signed finite y.
csqrt(-inf + NaN i) returns NaN + inf i.
csqrt(inf + NaN i) returns inf + NaN i.
csqrt(NaN + yi) returns NaN + NaN i.
csqrt(NaN + NaN i) returns NaN + NaN i.
NOTES
If z is in the upper half-plane, then csqrt(z) is in the upper-right quadrant of the complex plane. If z is in the lower half-plane, then
csqrt(z) is in the lower-right quadrant of the complex plane.
SEE ALSO complex(3)STANDARDS
The csqrt() function conforms to ISO/IEC 9899:2011.
4th Berkeley Distribution December 11, 2006 4th Berkeley Distribution
I have written a shell script called square, which prints the square of the input number, eg.
> square 4
16
There is a program called shc which compiles the shell scirpt and create a executable file and a c library file, namely square.x and square.x.c repectively.
If I would like to... (1 Reply)
Hi frieds, I don't understand the difference between single square bracket and double square brackets in a IF condition.
Ex.
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It run, but this
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