嘟嘟嘟 题意:按逆时针或顺时针给出一个多边形,求面积. 解法:直接套用公式:\(S = \frac{1}{2}|\sum _ {i = 1} ^ {n} {v_i \times v_{i + 1}}|\) 别忘了POJ实数输出的时候必须%\(f\),不能%\(lf\)-- #include<cstdio> #include<iostream> #include<cmath> #include<algorithm> #include<cstring>…

http://poj.org/problem?id=3907 题目大意:求多边形面积,结果四舍五入. ———————————————————— 多边形面积公式板子题. #include<cstdio> #include<queue> #include<cmath> #include<cstring> #include<vector> #include<algorithm> using namespace std; ; typedef…

问题: Springboot启动报错: Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.…

eclipse maven clean install 报错 1. 修改properties-->resource-->utf-8仍然报错 2.修改项目pom.xml文件,增加: <properties> <project.build.sourceEncoding> UTF-8 </project.build.sourceEncoding> </properties> 3.重新clean install 编译ok…

今天拉同事最新的代码,编译时老是报如下错误: Error:Could not find com.android.tools.build:gradle:2.2.0.Searched in the following locations: file:/D:/software/android-studio/gradle/m2repository/com/android/tools/build/gradle/2.2.0/gradle-2.2.0.pom file:/D:/software/android…

Download the build agent Downloading the build agent is really simple. Navigate to your TFS control panel, click on Agent pools and then Download agent. This post will assume you have setup your agent pool already but that's as simple as click New po…

Go语言有一个不(奇)错(葩)的设计,就是build constraints(构建约束).可以在源码中通过注释的方式指定编译选项,比如只允许在linux下,或者在386的平台上编译啊之类的:还可以通过文件名来约束构造,比如xxxx_linux.go,就是只允许在linux下编译,xxx_windows_amd64.go就是只允许在windows x64下编译. 构建约束可以在很多文件中使用,不单单是GO文件.但是必须要注意的是,通过注释实施构建约束的话,比如要放在文件的开头,要优先于空行或和其他…

1.Install gcc-arm-none-eabi https://devzone.nordicsemi.com/tutorials/7/This link shows that development with GCC and Eclipse, As it say we should download .extract and configure arm-none-eabi-gcc. But I find it's hard to download arm-none-eabi-gcc in…

Microsoft Build 2016 Day 1 记录 Microsoft Build 2016 进行到了第二天,我觉得这一天的内容非常精彩,因为主要和开发者相关…

去年今日:Microsoft Build 2015 汇总 今年的 Bulid 时间是 3.30-4.1,第一天的主角主要是 Windows 10.人工智能.HoloLens.小娜等,详细介绍:3 分钟看完 Build2016 Day 1 Keynote,对于 .NET 开发者来说,内容相对较少,但也有一些透露出来的内容,值得我们关注,下面介绍我搜刮到的一些. 1. Visual Studio "15" Preview and VS 2015 Update 2 RTM Now Avail…