Description The C library function FILE *freopen(const char *filename, const char *mode, FILE *stream) associates a new filename with the given open stream and at the same time closes the old file in the stream. Declaration Following is the declarati…

Description The C library function void rewind(FILE *stream) sets the file position to the beginning of the file of the given stream. Declaration Following is the declaration for rewind() function. void rewind(FILE *stream) Parameters stream − This i…

Description The C library function FILE *tmpfile(void) creates a temporary file in binary update mode (wb+). The temporary file created is automatically deleted when the stream is closed (fclose) or when the program terminates. Declaration Following…

Macro definition of snprintf conflicts with Standard Library function declaration 即将此处的宏定义注释掉,因为在VS2015中已经对snprintf提供了官方支持 D:\dev\libvpx\libvpx-v1.3.0\vp9\common\vp9_systemdependent.h #ifdef _MSC_VER #include <math.h> //#define snprintf _snprintf #e…

常用数学函数 1. 三角函数 double sin (double);//正弦 double cos (double);//余弦 double tan (double);//正切 2 .反三角函数 double asin (double); //结果介于[-PI/2, PI/2] double acos (double); //结果介于[0, PI] double atan (double); //反正切(主值), 结果介于[-PI/2, PI/2] double atan2 (double,…

import timedef date2mktime(date, format_='%Y-%m-%d'): return int(time.mktime(time.strptime(date, format_)))d=date2mktime('4000-01-01')print(d) C:\Users\Public\py36\python.exe D:/bizPythonDouban/selfPlatformAskAnswerProjeect/b.py Traceback (most recen…

题目传送门 /* 题意:1~1e9的数字里,各个位数数字相加和为s的个数 递推DP:dp[i][j] 表示i位数字,当前数字和为j的个数 状态转移方程:dp[i][j] += dp[i-1][j-k],为了不出现负数 改为:dp[i][j+k] += dp[i-1][j] */ #include <cstdio> #include <cstring> #include <cmath> #include <algorithm> #include <str…

Bionic libc doesn't load dependencies for current .so file (diff from Windows or Linux) so a explicit calling of Java's System.loadLibrary() is needed, in order to load depedency libraries. otherwise the original .so will fail to load. JNI_OnLoad wil…

百度云及其他网盘下载地址:点我 作者简介 Björn Karlsson works as a Senior Software Engineer at ReadSoft, where he spends most of his time designing and programming in C++. He has written a number of articles about C++ and the Boost libraries for publications such as C/C…

1.Link: http://poj.org/problem?id=2389 http://bailian.openjudge.cn/practice/2389/ 2.Content: Bull Math Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 13067   Accepted: 6736 Description Bulls are so much better at math than the cows. The…

Description Bulls are so much better at math than the cows. They can multiply huge integers together and get perfectly precise answers ... or so they say. Farmer John wonders if their answers are correct. Help him check the bulls' answers. Read in tw…

Instruments 用户指南 http://cdn.cocimg.com/bbs/attachment/Fid_6/6_24457_90eabb4ed5b3863.pdf 原著:Apple Inc. 翻译:謝業蘭[老狼] 联系:xyl.layne@gmail.com 鸣谢:有米移动广告平台 CocoaChina 社区 Instruments User Guide 目录 INSTRUMENTS用户指南...............................................…

1754: [Usaco2005 qua]Bull Math Time Limit: 5 Sec  Memory Limit: 64 MBSubmit: 374  Solved: 227[Submit][Status] Description Bulls are so much better at math than the cows. They can multiply huge integers together and get perfectly precise answers ... o…

“strcmp()” Anyone? strcmp() is a library function in C/C++ which compares two strings. It takes two strings as input parameter and decides which one is lexicographically larger or smaller: If the first string is greater then it returns a positive val…

起因 在极客学院讲授<使用Python编写远程控制程序>的课程中,涉及到查看被控制电脑屏幕截图的功能. 如果使用PIL,这个需求只需要三行代码: from PIL import ImageGrab pic = ImageGrab.grab() pic.save('1.jpg') 但是考虑到被控端应该尽量的精简,对其他模块尽量少的依赖,这样才能比较方便的部署,因此我考虑能否有一种方法,不依赖PIL来实现截图的功能. 思路 由于被控端使用了win32api, 因此有一个方法: win32api.k…

"Life is short, you need Python!" Python (British pronunciation:/ˈpaɪθən/ American pronunciation:/ˈpaɪθɑːn/)), is an object-oriented computer programming language, literal translation, with nearly 20 years of development history. It contains a s…

Given a positive integer num, write a function which returns True if num is a perfect square else False. Note: Do not use any built-in library function such as sqrt. Example 1: Input: 16 Returns: True Example 2: Input: 14 Returns: False Credits:Speci…

Implement a basic calculator to evaluate a simple expression string. The expression string contains only non-negative integers, +, -, *, / operators and empty spaces . The integer division should truncate toward zero. You may assume that the given ex…

Implement a basic calculator to evaluate a simple expression string. The expression string may contain open ( and closing parentheses ), the plus + or minus sign -, non-negative integers and empty spaces . You may assume that the given expression is…

strcmp() Anyone? Time Limit: 2000MS   Memory Limit: Unknown   64bit IO Format: %lld & %llu [Submit]   [Go Back]   [Status] Description   J “strcmp()” Anyone? Input: Standard Input Output: Standard Output strcmp() is a library function in C/C++ which…

HTTrack可以克隆指定网站-把整个网站下载到本地.可以用在离线浏览上,免费的噢! 强大的Httrack类似于搜索引擎的爬虫,也可以用来收集信息.记得之前写过篇http://www.cnblogs.com/dcb3688/p/4607985.html Python 爬取网站资源文件 现在我们用这个工具很easy的完成 安装: 官网:http://www.httrack.com/ 最新版本:httrack-3.48.22  (2016-5-16) linux wget http://downlo…

原文链接:https://swlaschin.gitbooks.io/fsharpforfunandprofit/content/posts/fvsc-sum-of-squares.html Comparing F# with C#: A simple sumF# PK C#:简单的求和 To see what some real F# code looks like, let's start with a simple problem: "sum the squares from 1 to N…

Implement a basic calculator to evaluate a simple expression string. The expression string contains only non-negative integers, +, -, *, / operators and empty spaces . The integer division should truncate toward zero. You may assume that the given ex…

使用PHP的cURL库可以简单和有效地去抓网页.你只需要运行一个脚本,然后分析一下你所抓取的网 页,然后就可以以程序的方式得到你想要的数据了.无论是你想从从一个链接上取部分数据,或是取一个XML文件并把其导入数据库,那怕就是简单的获取网页内 容,cURL 是一个功能强大的PHP库. PHP中的CURL函数库(Client URL Library Function) curl_close — 关闭一个curl会话 curl_copy_handle — 拷贝一个curl连接资源的所有内容和参数 cu…

NPTL vs PThread POSIX threads (pthread) is not an implementation, it is a API specification (a standard, on paper, in english) of several functions whose name starts with pthread_ and which are defined in <pthread.h> header. POSIX is also a set of s…

参考: http://edu.51cto.com/lesson/id-11222.html CPU中有计算单元 控制单元.它通过桥接芯片与存储器进行匹配 其中北桥是高速 南桥是低速 包括IDE USB等 通过中断控制器进行相应输入设备 例如鼠标等 MULTICS -> unics Unics-> unix bell实验室 这个设备版权 linux->是芬兰一个大学生开发 类Unix系统 不涉及版权 GUN 协议 GNU is Not Unix copyright copyleft VI…

463. Island Perimeterhttps://leetcode.com/problems/island-perimeter/就是逐一遍历所有的cell,用分离的cell总的的边数减去重叠的边的数目即可.在查找重叠的边的数目的时候有一点小技巧,就是沿着其中两个方向就好,这种题目都有类似的规律,就是可以沿着上三角或者下三角形的方向来做.一刷一次ac,但是还没开始注意codestyle的问题,需要再刷一遍. class Solution { public: int islandPerime…

mac上eclipse用gdb调试 With its new OS release, Apple has discontinued the use of GDB in OS X. Since 2005 Apple has steadily been moving away from the GNU toolchain in favor of LLVM. This means that Xcode now uses LLDB instead. LLDB looks to be a very nic…

使用PHP的cURL库可以简单和有效地去抓网页.你只需要运行一个脚本,然后分析一下你所抓取的网 页,然后就可以以程序的方式得到你想要的数据了.无论是你想从从一个链接上取部分数据,或是取一个XML文件并把其导入数据库,那怕就是简单的获取网页内 容,cURL 是一个功能强大的PHP库. PHP中的CURL函数库(Client URL Library Function) curl_close — 关闭一个curl会话curl_copy_handle — 拷贝一个curl连接资源的所有内容和参数curl…

这段时间复习了一下内核调试系统,注意看了一下printk的实现以及内核日志的相关知识,这里做一下总结. 1.问题的引出: 做DPDK项目时,调试rte_kni.ko时,发现printk并不会向我们想想的那样把log信息显示在我们的终端上.有人总结了三个原因: 原因1:printk()有一个控制日志级别的字段,如果该字段的日记级别高于console默认的日志级别那么才会打印出来(数值越小日志级别越高,分为从0-7共计8个日志级别).有一种简单的改变当前终端的日志级别的方法,echo 8 > /sy…