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| <h3 class="section">8.4 <code>difftime</code>—subtract two times</h3> |
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| <p><a name="index-difftime-433"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <time.h> |
| double difftime(time_t <var>tim1</var>, time_t <var>tim2</var>); |
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| </pre> |
| <p><strong>Description</strong><br> |
| Subtracts the two times in the arguments: `<var>tim1</var><code> - </code><var>tim2</var>'. |
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| <p><br> |
| <strong>Returns</strong><br> |
| The difference (in seconds) between <var>tim2</var> and <var>tim1</var>, as a <code>double</code>. |
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| <p><br> |
| <strong>Portability</strong><br> |
| ANSI C requires <code>difftime</code>, and defines its result to be in seconds |
| in all implementations. |
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| <p><code>difftime</code> requires no supporting OS subroutines. |
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