??xml version="1.0" encoding="utf-8" standalone="yes"?>99这里只有久久精品视频,中文在线资源观看视频网站免费不卡,久久爱另类一区二区小说 http://m.shnenglu.com/sdfond/category/12446.html世事z明皆学问,人情l达x?/description>zh-cn Sun, 25 Apr 2010 06:30:21 GMT Sun, 25 Apr 2010 06:30:21 GMT 60 _辟 http://m.shnenglu.com/sdfond/archive/2010/03/18/109973.htmlsdfond sdfond Thu, 18 Mar 2010 04:35:00 GMT http://m.shnenglu.com/sdfond/archive/2010/03/18/109973.html http://m.shnenglu.com/sdfond/comments/109973.html http://m.shnenglu.com/sdfond/archive/2010/03/18/109973.html#Feedback 0 http://m.shnenglu.com/sdfond/comments/commentRss/109973.html http://m.shnenglu.com/sdfond/services/trackbacks/109973.html If it's not there and you can see it —?it's virtual If it's there and you can't see it —?it's transparent If it's not there and you can't see it —?you erased it! ]]> 关于UM操作 http://m.shnenglu.com/sdfond/archive/2009/12/03/102438.htmlsdfond sdfond Thu, 03 Dec 2009 01:31:00 GMT http://m.shnenglu.com/sdfond/archive/2009/12/03/102438.html http://m.shnenglu.com/sdfond/comments/102438.html http://m.shnenglu.com/sdfond/archive/2009/12/03/102438.html#Feedback 2 http://m.shnenglu.com/sdfond/comments/commentRss/102438.html http://m.shnenglu.com/sdfond/services/trackbacks/102438.html
1 #include < iostream > 2 using namespace std; 3 4 int main() 5 { 6 int i = 10 , d = 32 ; 7 8 printf( " %d\n " , i >> d); 9 10 return 0 ; 11 } 12
q里输出仍然?0。一直不理解Z么是q样Q正常理解输出是0才对。后来到|上查阅了一下,原来在C99标准中规定如果移位操作的位数大于{于位宽那么l果是未定义的。这句话居然在K & R的著作中有提到Q实在是牛?br> q段代码实际执行的时候,据说g会自动对字长取模Q因此可以认为值没有改变。当Ӟ如果换一U写法:
#include < iostream > using namespace std; int main() { int i = 10 >> 32 ; printf( " %d\n " , i); return 0 ; }
q样输出是零了Q但是有~译警告Q看来编译器的想法和一般的x是一LQ呵c?br> ]]> 开始读CSAPP http://m.shnenglu.com/sdfond/archive/2009/11/30/102261.htmlsdfond sdfond Mon, 30 Nov 2009 01:40:00 GMT http://m.shnenglu.com/sdfond/archive/2009/11/30/102261.html http://m.shnenglu.com/sdfond/comments/102261.html http://m.shnenglu.com/sdfond/archive/2009/11/30/102261.html#Feedback 0 http://m.shnenglu.com/sdfond/comments/commentRss/102261.html http://m.shnenglu.com/sdfond/services/trackbacks/102261.html q本书基本上늛了计机专业的许多主q课E,包括计算机组成原理、操作系l、编译原理等{,q些评重要且不是很好懂。虽然这些课E我已学q,但是现在回想h有许多细节都忘记了。这本书把那些课E中的重要部分抽成若q章节讲qͼ对于我来_是一U不错的回顾知识的方式?br> 书中_学习计算机知识最重要的是动手实践。的,那些Uh的知识如果没有亲自验证,很难真正理解和记忆。可惜的是我在大学课堂上学习q些知识的时候,老师没有实验和知识的兌Q更多时候我们像是在完成一Q务而已Qƈ没有把它当成学习知识、理解知识必要的步骤。这也许不是评设计者的初衷吧,不过现在发展成这P实是一U悲哀?br> ]]> 青青草原综合久久大伊人导航_色综合久久天天综合_日日噜噜夜夜狠狠久久丁香五月_热久久这里只有精品
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