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| <h3 class="section">1.44 <code>nextafter</code>, <code>nextafterf</code>—get next number</h3> |
| |
| <p><a name="index-nextafter-123"></a><a name="index-nextafterf-124"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <math.h> |
| double nextafter(double <var>val</var>, double <var>dir</var>); |
| float nextafterf(float <var>val</var>, float <var>dir</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| <code>nextafter</code> returns the double-precision floating-point number |
| closest to <var>val</var> in the direction toward <var>dir</var>. <code>nextafterf</code> |
| performs the same operation in single precision. For example, |
| <code>nextafter(0.0,1.0)</code> returns the smallest positive number which is |
| representable in double precision. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| Returns the next closest number to <var>val</var> in the direction toward |
| <var>dir</var>. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| Neither <code>nextafter</code> nor <code>nextafterf</code> is required by ANSI C |
| or by the System V Interface Definition (Issue 2). |
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