欧几里德算法:辗转求余 原理: gcd(a,b)=gcd(b,a mod b) 当b为0时,两数的最大公约数即为a getchar()会接受前一个scanf的回车符
上传时间: 2014-01-10
上传用户:2467478207
This book is intended as a thorough introduction to both PCI and PCI-X. Is as a “companion” to the specifications. If you’re designing boards or systems using offthe-shelf PCI interface silicon, this book together with the silicon vendor’s data sheets should be sufficient for your needs. On the other hand, if your goal is to design PCI silicon, motherboards or backplanes, you will undoubtedly need to reference the specifications for additional detail.
标签: introduction companion intended thorough
上传时间: 2014-08-18
上传用户:hoperingcong
数据结构课程设计 数据结构B+树 B+ tree Library
上传时间: 2013-12-31
上传用户:semi1981
本文介绍一种基于PCI Express 总线的高速数据采集卡的设计方案及功能实现。给出系统的基本结构及单元组成,重点阐述系统硬件设计的关键技术和本地总线的控制逻辑,详细探讨了基于DriverWorks 的设备驱动程序的开发以及上层应用软件的设计。该系统通过实践验证,可用于卫星下行高速数据的接收并可适用于其他高速数据采集与处理系统。关键词:PCI Express 总线 PCIE PEX8311 DMA 板卡驱动 随着空间科学和空间电子学技术的飞速发展,空间科学实验的种类和数量以及科学实验所产生的数据量不断增加。为了使地面接收处理系统能够实时处理和显示科学图像数据,必须要设计出新的地面数据接收处理系统,实现大量高速数据的正确接收采集、处理以及存储。为了满足地面系统的要求,并为以后的计算机系统升级提供更广阔的空间,本系统拟采用第三代I/O 互连技术PCI Express(简称PCI-E)作为本数据采集卡的进机总线形式。本文通过对PCI-E 总线专用接口芯片PLX 公司的PEX8311 性能分析,特别是对突发读、写和DMA读操作的时序研究,设计出本地总线的可编程控制逻辑,并详细讨论了整个PCI-E 高速数据采集卡的硬件设计方案,以及WDM 驱动程序和上层应用程序的设计方法。
上传时间: 2013-10-28
上传用户:tianyi996
The government of a small but important country has decided that the alphabet needs to be streamlined and reordered. Uppercase letters will be eliminated. They will issue a royal decree in the form of a String of B and A characters. The first character in the decree specifies whether a must come ( B )Before b in the new alphabet or ( A )After b . The second character determines the relative placement of b and c , etc. So, for example, "BAA" means that a must come Before b , b must come After c , and c must come After d . Any letters beyond these requirements are to be excluded, so if the decree specifies k comparisons then the new alphabet will contain the first k+1 lowercase letters of the current alphabet. Create a class Alphabet that contains the method choices that takes the decree as input and returns the number of possible new alphabets that conform to the decree. If more than 1,000,000,000 are possible, return -1. Definition
标签: government streamline important alphabet
上传时间: 2015-06-09
上传用户:weixiao99
* 高斯列主元素消去法求解矩阵方程AX=B,其中A是N*N的矩阵,B是N*M矩阵 * 输入: n----方阵A的行数 * a----矩阵A * m----矩阵B的列数 * b----矩阵B * 输出: det----矩阵A的行列式值 * a----A消元后的上三角矩阵 * b----矩阵方程的解X
上传时间: 2015-07-26
上传用户:xauthu
We have a group of N items (represented by integers from 1 to N), and we know that there is some total order defined for these items. You may assume that no two elements will be equal (for all a, b: a<b or b<a). However, it is expensive to compare two items. Your task is to make a number of comparisons, and then output the sorted order. The cost of determining if a < b is given by the bth integer of element a of costs (space delimited), which is the same as the ath integer of element b. Naturally, you will be judged on the total cost of the comparisons you make before outputting the sorted order. If your order is incorrect, you will receive a 0. Otherwise, your score will be opt/cost, where opt is the best cost anyone has achieved and cost is the total cost of the comparisons you make (so your score for a test case will be between 0 and 1). Your score for the problem will simply be the sum of your scores for the individual test cases.
标签: represented integers group items
上传时间: 2016-01-17
上传用户:jeffery
(1) 、用下述两条具体规则和规则形式实现.设大写字母表示魔王语言的词汇 小写字母表示人的语言词汇 希腊字母表示可以用大写字母或小写字母代换的变量.魔王语言可含人的词汇. (2) 、B→tAdA A→sae (3) 、将魔王语言B(ehnxgz)B解释成人的语言.每个字母对应下列的语言.
上传时间: 2013-12-30
上传用户:ayfeixiao
1.有三根杆子A,B,C。A杆上有若干碟子 2.每次移动一块碟子,小的只能叠在大的上面 3.把所有碟子从A杆全部移到C杆上 经过研究发现,汉诺塔的破解很简单,就是按照移动规则向一个方向移动金片: 如3阶汉诺塔的移动:A→C,A→B,C→B,A→C,B→A,B→C,A→C 此外,汉诺塔问题也是程序设计中的经典递归问题
上传时间: 2016-07-25
上传用户:gxrui1991
1. 下列说法正确的是 ( ) A. Java语言不区分大小写 B. Java程序以类为基本单位 C. JVM为Java虚拟机JVM的英文缩写 D. 运行Java程序需要先安装JDK 2. 下列说法中错误的是 ( ) A. Java语言是编译执行的 B. Java中使用了多进程技术 C. Java的单行注视以//开头 D. Java语言具有很高的安全性 3. 下面不属于Java语言特点的一项是( ) A. 安全性 B. 分布式 C. 移植性 D. 编译执行 4. 下列语句中,正确的项是 ( ) A . int $e,a,b=10 B. char c,d=’a’ C. float e=0.0d D. double c=0.0f
上传时间: 2017-01-04
上传用户:netwolf