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90 lines
3.3 KiB
HTML
90 lines
3.3 KiB
HTML
4 years ago
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<title>csqrt (LIBM)</title>
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<meta name="description" content="csqrt (LIBM)">
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<link href="Document-Index.html#Document-Index" rel="index" title="Document Index">
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<link href="Document-Index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Complex.html#Complex" rel="up" title="Complex">
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<body lang="en">
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<a name="csqrt"></a>
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<div class="header">
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<p>
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Next: <a href="ctan.html#ctan" accesskey="n" rel="next">ctan</a>, Previous: <a href="csinh.html#csinh" accesskey="p" rel="prev">csinh</a>, Up: <a href="Complex.html#Complex" accesskey="u" rel="up">Complex</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="csqrt_002c-csqrtf_002d_002d_002dcomplex-square-root"></a>
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<h3 class="section">2.21 <code>csqrt</code>, <code>csqrtf</code>—complex square root</h3>
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<a name="index-csqrt"></a>
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<a name="index-csqrtf"></a>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">#include <complex.h>
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double complex csqrt(double complex <var>z</var>);
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float complex csqrtf(float complex <var>z</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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These functions compute the complex square root of <var>z</var>, with
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a branch cut along the negative real axis.
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</p>
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<p><code>csqrtf</code> is identical to <code>csqrt</code>, except that it performs
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its calculations on <code>floats complex</code>.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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The csqrt functions return the complex square root value, in
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the range of the right halfplane (including the imaginary axis).
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</p>
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<br>
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<p><strong>Portability</strong><br>
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<code>csqrt</code> and <code>csqrtf</code> are ISO C99
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</p>
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<br>
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