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| <h3 class="section">1.39 <code>lround</code>, <code>lroundf</code>, <code>llround</code>, <code>llroundf</code>–round to integer, to nearest</h3> |
| |
| <p><a name="index-lround-112"></a><a name="index-lroundf-113"></a><a name="index-llround-114"></a><a name="index-llroundf-115"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <math.h> |
| long int lround(double <var>x</var>); |
| long int lroundf(float <var>x</var>); |
| long long int llround(double <var>x</var>); |
| long long int llroundf(float <var>x</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| The <code>lround</code> and <code>llround</code> functions round their argument to the |
| nearest integer value, rounding halfway cases away from zero, regardless |
| of the current rounding direction. If the rounded value is outside the |
| range of the return type, the numeric result is unspecified (depending |
| upon the floating-point implementation, not the library). A range |
| error may occur if the magnitude of x is too large. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| <var>x</var> rounded to an integral value as an integer. |
| |
| <p><br> |
| <strong>See Also</strong><br> |
| See the <code>round</code> functions for the return being the same floating-point type |
| as the argument. <code>lrint</code>, <code>llrint</code>. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| ANSI C, POSIX |
| |
| <p><br> |
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