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| <h3 class="section">5.30 <code>strncmp</code>—character string compare</h3> |
| |
| <p><a name="index-strncmp-398"></a><strong>Synopsis</strong> |
| <pre class="example"> #include <string.h> |
| int strncmp(const char *<var>a</var>, const char * <var>b</var>, size_t <var>length</var>); |
| |
| </pre> |
| <p><strong>Description</strong><br> |
| <code>strncmp</code> compares up to <var>length</var> characters |
| from the string at <var>a</var> to the string at <var>b</var>. |
| |
| <p><br> |
| <strong>Returns</strong><br> |
| If <code>*</code><var>a</var> sorts lexicographically after <code>*</code><var>b</var>, |
| <code>strncmp</code> returns a number greater than zero. If the two |
| strings are equivalent, <code>strncmp</code> returns zero. If <code>*</code><var>a</var> |
| sorts lexicographically before <code>*</code><var>b</var>, <code>strncmp</code> returns a |
| number less than zero. |
| |
| <p><br> |
| <strong>Portability</strong><br> |
| <code>strncmp</code> is ANSI C. |
| |
| <p><code>strncmp</code> requires no supporting OS subroutines. |
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