| <html lang="en"> |
| <head> |
| <title>copysign - Untitled</title> |
| <meta http-equiv="Content-Type" content="text/html"> |
| <meta name="description" content="Untitled"> |
| <meta name="generator" content="makeinfo 4.13"> |
| <link title="Top" rel="start" href="index.html#Top"> |
| <link rel="up" href="Math.html#Math" title="Math"> |
| <link rel="prev" href="cbrt.html#cbrt" title="cbrt"> |
| <link rel="next" href="cosh.html#cosh" title="cosh"> |
| <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> |
| <meta http-equiv="Content-Style-Type" content="text/css"> |
| <style type="text/css"><!-- |
| pre.display { font-family:inherit } |
| pre.format { font-family:inherit } |
| pre.smalldisplay { font-family:inherit; font-size:smaller } |
| pre.smallformat { font-family:inherit; font-size:smaller } |
| pre.smallexample { font-size:smaller } |
| pre.smalllisp { font-size:smaller } |
| span.sc { font-variant:small-caps } |
| span.roman { font-family:serif; font-weight:normal; } |
| span.sansserif { font-family:sans-serif; font-weight:normal; } |
| --></style> |
| </head> |
| <body> |
| <div class="node"> |
| <a name="copysign"></a> |
| <p> |
| Next: <a rel="next" accesskey="n" href="cosh.html#cosh">cosh</a>, |
| Previous: <a rel="previous" accesskey="p" href="cbrt.html#cbrt">cbrt</a>, |
| Up: <a rel="up" accesskey="u" href="Math.html#Math">Math</a> |
| <hr> |
| </div> |
| |
| <h3 class="section">1.12 <code>copysign</code>, <code>copysignf</code>—sign of <var>y</var>, magnitude of <var>x</var></h3> |
| |
| <p><a name="index-copysign-33"></a><a name="index-copysignf-34"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <math.h> |
| double copysign (double <var>x</var>, double <var>y</var>); |
| float copysignf (float <var>x</var>, float <var>y</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| <code>copysign</code> constructs a number with the magnitude (absolute value) |
| of its first argument, <var>x</var>, and the sign of its second argument, |
| <var>y</var>. |
| |
| <p><code>copysignf</code> does the same thing; the two functions differ only in |
| the type of their arguments and result. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| <code>copysign</code> returns a <code>double</code> with the magnitude of |
| <var>x</var> and the sign of <var>y</var>. |
| <code>copysignf</code> returns a <code>float</code> with the magnitude of |
| <var>x</var> and the sign of <var>y</var>. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| <code>copysign</code> is not required by either ANSI C or the System V Interface |
| Definition (Issue 2). |
| |
| <p><br> |
| |
| </body></html> |
| |
