http://www.ethernut.de/nutwiki/index.php?action=history&feed=atom&title=Strchr 2026-04-26T15:46:00Z Revision history for this page on the wiki MediaWiki 1.26.2 http://www.ethernut.de/nutwiki/index.php?title=Strchr&diff=266&oldid=prev 2016-10-27T16:03:01Z

<p>1 revision imported</p> <table class='diff diff-contentalign-left'> <tr style='vertical-align: top;' lang='en'> <td colspan='1' style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan='1' style="background-color: white; color:black; text-align: center;">Revision as of 16:03, 27 October 2016</td> </tr><tr><td colspan='2' style='text-align: center;' lang='en'><div class="mw-diff-empty">(No difference)</div> </td></tr></table>

Harald http://www.ethernut.de/nutwiki/index.php?title=Strchr&diff=265&oldid=prev 2008-03-12T06:09:43Z

<p>New page: == Description == One day i find strchr in NutApi: char *strchr( const char * p, int ch) { for (;; ++p) { if (*p == ch) return ((char *) p); if (!*p...</p> <p><b>New page</b></p><div>== Description ==<br /> One day i find strchr in NutApi:<br /> char *strchr( const char * p, int ch)<br /> {<br /> for (;; ++p) {<br /> if (*p == ch)<br /> return ((char *) p);<br /> if (!*p)<br /> return ((char *) NULL);<br /> }<br /> /* NOTREACHED */<br /> }<br /> == Test Environment ==<br /> This sample should run on all platforms. I actually used: <br /> Nut/OS: Version 4.5.0 <br /> Hardware: ATmega128. <br /> Compiler: icc 7<br /> Debug tool: AVR Studio<br /> == ''Source Code 1''==<br /> #include &lt;stdio.h&gt;<br /> char * test=&quot;ethernut&quot;;<br /> char *strchr_test( char * const p, int ch)<br /> {<br /> for (;; ++p) {<br /> if (*p == ch)<br /> return ((char *) p);<br /> if (!*p)<br /> return ((char *) NULL);<br /> }<br /> /* NOTREACHED */<br /> }<br /> int main(void)<br /> {<br /> char * temp;<br /> temp=strchr_test(test,'e');<br /> printf(&quot;%s\r\n&quot;, temp);<br /> }<br /> <br /> the result is : temp=NULL;<br /> [[Image:UnExpected.JPG]]<br /> <br /> == ''Source Code 2'' ==<br /> #include &lt;string.h&gt;<br /> #include &lt;stdio.h&gt;<br /> char * test=&quot;ethernut&quot;;<br /> char *strchr_test( const char * p, int ch)<br /> {<br /> for (;; ++p) {<br /> if (*p == ch)<br /> return ((char *) p);<br /> if (!*p)<br /> return ((char *) NULL);<br /> }<br /> /* NOTREACHED */<br /> }<br /> int main(void)<br /> {<br /> char * temp;<br /> temp=strchr(test,'e');<br /> printf(&quot;%s\r\n&quot;, temp);<br /> }<br /> And this time the result is as we expected: <br /> [[Image:Expected.JPG]]<br /> <br /> == seek help ==<br /> Anyone who knows reasons, please keep in touch with me.<br /> I will be very grateful to him.<br /> <br /> email: liyongming1982@163.com<br /> from: Guangzhou,China</div>

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