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📁 一份很好的linux入门资料
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<HTML><HEAD>  <TITLE>BBS水木清华站∶精华区</TITLE></HEAD><BODY><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER>发信人:&nbsp;althea&nbsp;(边缘人),&nbsp;信区:&nbsp;Linux&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>标&nbsp;&nbsp;题:&nbsp;Re:&nbsp;time函数怎么调用啊？&nbsp;<BR>发信站:&nbsp;BBS&nbsp;水木清华站&nbsp;(Fri&nbsp;Jan&nbsp;14&nbsp;20:55:09&nbsp;2000)&nbsp;<BR>&nbsp;<BR>【&nbsp;在&nbsp;linuxrat&nbsp;(叫我老鼠错不了)&nbsp;的大作中提到:&nbsp;】&nbsp;<BR>∶<I>&nbsp;&nbsp;gene,&nbsp;I&nbsp;tried&nbsp;time(tt),time(NULL)&nbsp;and&nbsp;time(&amp;ta).&nbsp;All&nbsp;are&nbsp;available!&nbsp;</I><BR>∶<I>&nbsp;&nbsp;I&nbsp;don't&nbsp;know&nbsp;why&nbsp;you&nbsp;took&nbsp;errors.&nbsp;:(&nbsp;</I><BR>∶<I>&nbsp;&nbsp;here's&nbsp;my&nbsp;source:&nbsp;</I><BR>∶<I>&nbsp;&nbsp;====timetest.c======&nbsp;</I><BR>∶<I>&nbsp;&nbsp;#include&nbsp;&lt;stdio.h&gt;&nbsp;</I><BR>∶<I>&nbsp;&nbsp;#include&nbsp;&lt;time.h&gt;&nbsp;</I><BR>∶<I>&nbsp;&nbsp;int&nbsp;main()&nbsp;</I><BR>∶<I>&nbsp;&nbsp;{&nbsp;</I><BR>∶<I>&nbsp;&nbsp;&nbsp;&nbsp;time_t&nbsp;t,&nbsp;*tt;&nbsp;</I><BR>∶<I>&nbsp;&nbsp;&nbsp;&nbsp;time_t&nbsp;tr,&nbsp;ta;&nbsp;</I><BR>∶<I>&nbsp;&nbsp;&nbsp;&nbsp;time_t&nbsp;hello;&nbsp;</I><BR>∶<I>&nbsp;&nbsp;&nbsp;t=time(tt);&nbsp;</I><BR>rat,&nbsp;你这样的写法不太好吧,&nbsp;tt如果初始就是NULL就没问题(相当于直接传NULL),&nbsp;&nbsp;<BR>否则会出错的&nbsp;<BR>当然,&nbsp;这依赖于编译器,&nbsp;不一定会报错.&nbsp;我见过有人写的程序返回局部变量的地址(显然&nbsp;<BR>不正确),&nbsp;但运行却没报错&nbsp;<BR>∶<I>&nbsp;&nbsp;&nbsp;tr=time(ta);&nbsp;</I><BR>这样写也通过了???&nbsp;需要的是&nbsp;time_t*&nbsp;<BR>∶<I>&nbsp;&nbsp;&nbsp;hello=time(NULL);&nbsp;</I><BR>∶<I>&nbsp;&nbsp;&nbsp;printf(&quot;Time1=%ld\nTime2=%ld\nTime3=%ld\n&quot;,&nbsp;t,&nbsp;tr,&nbsp;hello);&nbsp;</I><BR>∶<I>&nbsp;&nbsp;&nbsp;exit(0);&nbsp;</I><BR>∶<I>&nbsp;&nbsp;}&nbsp;&nbsp;&nbsp;</I><BR>∶<I>&nbsp;&nbsp;gcc&nbsp;-o&nbsp;timetest&nbsp;timetest.c&nbsp;</I><BR>∶<I>&nbsp;&nbsp;./timetest&nbsp;</I><BR>∶<I>&nbsp;&nbsp;Result:&nbsp;</I><BR>∶<I>&nbsp;&nbsp;time=947853049&nbsp;</I><BR>∶<I>&nbsp;&nbsp;time=947853049&nbsp;</I><BR>∶<I>&nbsp;&nbsp;time=947853049&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</I><BR>&nbsp;<BR>&nbsp;<BR>--&nbsp;<BR>※&nbsp;修改:·althea&nbsp;於&nbsp;Jan&nbsp;14&nbsp;21:00:02&nbsp;修改本文·[FROM:&nbsp;&nbsp;&nbsp;162.105.39.43]&nbsp;<BR>※&nbsp;来源:·BBS&nbsp;水木清华站&nbsp;smth.org·[FROM:&nbsp;162.105.39.43]&nbsp;<BR><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER></BODY></HTML>
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