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<TD class=title_td><FONT
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<DIV align=center>[ 作者:dexin 加入时间:2006-10-16
12:15:46 来自:Linux联盟收集
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<TD><FONT class=f14 id=zoom><FONT color=#000000><SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR><SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>以上介绍了网络编程的有关库函数的调用方法，下面举一个客户机/服务器程序的小例子具体说明如何设计网络程序。本例介绍如何查看服务器上的时间和日期，由于daytime服务器的通用端口为13，客户机程序将通过调用13号端口对服务器上的时间和日期进行操作。<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR><SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR><SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>/*timeserve.c*/<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>/*服务器程序伪代码如下：<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR><SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>打开daytime监听端口；<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>while(客户机与服务器成功连接——成功返回通信文件描述符)<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>{<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>fork()<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>子进程：<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>{<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>读出当前时间；<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>将当前时间写入通信文件描述符；<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>关闭通信文件描述符；<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>}<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>父进程：<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>关闭通信文件描述符；<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>}<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>*/<SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR><SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>#include <SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>#include <SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>#include <SPAN
style="DISPLAY: none">it6Linux联盟</SPAN><BR>#include <SPAN
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