当前位置:网站首页 > C++编程 > 正文

ubuntuvscode配置c++环境_python环境搭建

Swift+Ubuntu环境配置

首先假定我们已经安装好Ubuntu Linux操作系统了,这个系统安装很简单,网上很多的步骤教程,虚拟机的话推荐用VirtualBox。Swift支持Ubuntu 14.04和15.10两个发型版,我这选择15.10版本的包。

第一步:下载 Swift 2.2 工具链压缩包,打开终端,输入命令新建目录并下载(可以自行到 swift.org 搜索)  

diveinedu@diveinedu-VirtualBox:~$ mkdir swift && cd swift; diveinedu@diveinedu-VirtualBox:~/swift$ wget https://swift.org/builds/swift-2.2-release/ubuntu1510/swift-2.2-RELEASE/swift-2.2-RELEASE-ubuntu15.10.tar.gz 

第二步:用tar命令解压 Swift 2.2 工具链压缩包到当前目录,并配置环境变量

先解压,再进入目录,目录下会有usr/binusr/lib等等子目录:

diveinedu@diveinedu-VirtualBox:~/swift$ tar xvf swift-2.2-RELEASE-ubuntu15.10.tar.gz diveinedu@diveinedu-VirtualBox:~/swift$ cd swift-2.2-RELEASE-ubuntu15.10/ 

然后配置用户级别的环境变量,编辑$HOME/.bashrc配置文件

diveinedu@diveinedu-VirtualBox:~/swift/swift-2.2-RELEASE-ubuntu15.10$ gedit $HOME/.bashrc 

上面命令会调出图形界面文本编辑器GEdit来编辑这个配置文件,在文件的最后输入如下配置行并保存退出编辑器

export SWIFT_HOME=$HOME/swift/swift-2.2-RELEASE-ubuntu15.10 export PATH=$SWIFT_HOME/usr/bin:$PATH export LD_LIBRARY_PATH=$SWIFT_HOME/usr/lib:$LD_LIBRARY_PATH export LIBRARY_PATH=$SWIFT_HOME/usr/lib:$LIBRARY_PATH 

这样环境变量就配置OK啦。这个时候我们只需要关闭我们的Shell终端重新打开终端就生效了。

3.Swift+Ubuntu初次体验

搞过iOS开发的都知道,2014年6月Swift刚出世时就随Xcode带了Playground功能,可以边写边看运行结果,辣么在Ubuntu Linux下有没有类似的呢,也有,只是没那么强大的IDE支持,我们一样可以运行类似Pyhton脚本解析器一样的Swift解析器,同步输入Swift代码来“解析”运行。这个命令就是swift,在上面的环境变量设置完后重开终端就可以直接使用了,如下所示。

diveinedu@diveinedu-VirtualBox:~$ swift Welcome to Swift version 2.2-dev (LLVM 46be9ff861, Clang 4deb154edc, Swift 778f82939c). Type :help for assistance. 1> let hello = "hello"; hello: String = "hello" 2> let world = "diveinedu" world: String = "diveinedu" 3> let space = " " space: String = " " 4> print(hello+space+world); hello diveinedu 5>hello. Available completions: append(c: Character) -> Void append(x: UnicodeScalar) -> Void appendContentsOf(newElements: S) -> Void appendContentsOf(other: String) -> Void characters: String.CharacterView debugDescription: String endIndex: Index hashValue: Int insert(newElement: Character, atIndex: Index) -> Void insertContentsOf(newElements: S, at: Index) -> Void isEmpty: Bool lowercaseString: String nulTerminatedUTF8: ContiguousArray<CodeUnit> removeAll() -> Void removeAll(keepCapacity: Bool) -> Void removeAtIndex(i: Index) -> Character removeRange(subRange: Range<Index>) -> Void replaceRange(subRange: Range<Index>, with: C) -> Void replaceRange(subRange: Range<Index>, with: String) -> Void reserveCapacity(n: Int) -> Void startIndex: Index unicodeScalars: String.UnicodeScalarView uppercaseString: String utf16: String.UTF16View utf8: String.UTF8View withCString(f: UnsafePointer<Int8> throws -> ResultUnsafePointer<Int8> throws -> Result) -> Result withMutableCharacters(body: (inout String.CharacterView) -> R(inout String.CharacterView) -> R) -> R write(other: String) -> Void writeTo(&target: Target) -> Void 6> hello.isEmpty $R0: Bool = false 

在这个解析执行界面还有自动提示补全功能!简直四国矣.上面第五行是输入hello后再输入一点.然后按tab键,一下就出来这么多关于字符串的方法,妈妈再也不担心我在终端模式下不记得方法名了。

上面这特简单的几行代码还没包含类和对象,下面看看在swift解析器中直接输入类的定义和对象创建和简单使用。

diveinedu@diveinedu-VirtualBox:~$ swift Welcome to Swift version 2.2-dev (LLVM 46be9ff861, Clang 4deb154edc, Swift 778f82939c). Type :help for assistance. 1> struct Resolution { 2. var width = 0 3. var height = 0 4. } 5. class VideoMode { 6. var resolution = Resolution() 7. var interlaced = false 8. var frameRate = 0.0 9. var name: String? 10. func description() 11. { 12. print("name:\(name) frameRate:\(frameRate)") 13. } 14. } 15> let mode = VideoMode() mode: VideoMode = { resolution = { width = 0 height = 0 } interlaced = false frameRate = 0 name = nil } 16> mode.name = "1080p HD" 17> mode.frameRate = 30.0 18> mode.description() name:Optional("1080p HD") frameRate:30.0 19> 

这些都只是在swift解析器中临时性的运行一些代码,如果我们需要新建.swift格式文件然后编译成可执行二进制文件形式又要怎样做呢,同样很简单,我们可以用swiftc这个命令来编译。 我们可以新建一个目录来存放swift代码文件,然后编辑一个test.swift

diveinedu@diveinedu-VirtualBox:~$ mkdir -p $HOME/swift/swiftcode diveinedu@diveinedu-VirtualBox:~$ cd $HOME/swift/swiftcode diveinedu@diveinedu-VirtualBox:~/swift/swiftcode$ gedit test.swift 

当打开gedit文本编辑器后,输入上面的类和对象创建以及方法调用的代码,列出在下面

struct Resolution { var width = 0 var height = 0 } class VideoMode { var resolution = Resolution() var interlaced = false var frameRate = 0.0 var name: String? func description() { print("name:\(name) frameRate:\(frameRate)") } } let mode = VideoMode() mode.name = "1080p HD" mode.frameRate = 30.0 mode.description() 

保存后关闭编辑器,然后执行swiftc test.swift来编译源文件,会出现如下链接错误:

diveinedu@diveinedu-VirtualBox:~/swift/swiftcode$ swiftc test.swift <unknown>:0: error: link command failed with exit code 127 (use -v to see invocation) diveinedu@diveinedu-VirtualBox:~/swift/swiftcode$ 

解决办法是安装编译依赖clang libicu-dev,输入下面命令回车(会询问当前用户密码)

diveinedu@diveinedu-VirtualBox:~/swift/swiftcode$ sudo apt-get install clang libicu-dev 

安装完成后再次执行编译命令swiftc test.swift就顺利编译成功,再当前目录下输出test可执行文件。

diveinedu@diveinedu-VirtualBox:~/swift/swiftcode$ swiftc test.swift diveinedu@diveinedu-VirtualBox:~/swift/swiftcode$ ./test name:Optional("1080p HD") frameRate:30.0 

而且执行ldd ./test查看此二进制文件依赖的动态库可知,它链接了libswiftCore,这是所有swift程序都会需要的。

diveinedu@diveinedu-VirtualBox:~/swift/swiftcode$ ldd ./test linux-vdso.so.1 => (0x00007ffcef3f5000) libswiftCore.so => /home/diveinedu/swift/swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu15.10/usr/lib/swift/linux/libswiftCore.so (0x00007f1cd2f75000) libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f1cd2bdd000) libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f1cd28d5000) libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f1cd26be000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f1cd22f3000) libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f1cd20d5000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f1cd1ed1000) libicuuc.so.55 => /usr/lib/x86_64-linux-gnu/libicuuc.so.55 (0x00007f1cd1b3c000) libicui18n.so.55 => /usr/lib/x86_64-linux-gnu/libicui18n.so.55 (0x00007f1cd16d9000) libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007f1cd14c9000) /lib64/ld-linux-x86-64.so.2 (0x0000556e488b7000) libicudata.so.55 => /usr/lib/x86_64-linux-gnu/libicudata.so.55 (0x00007f1ccfa11000) 

细心的读者会发现好像不见main函数或者main相关的函数,程序照样可以运行,不管是脚本还是编译成二进制可执行文件,这个我以后再细说了。

The Swift Programming Language 2.2

TheSwiftProgrammingLanguage(Swift2.2)

到此这篇ubuntuvscode配置c++环境_python环境搭建的文章就介绍到这了,更多相关内容请继续浏览下面的相关推荐文章,希望大家都能在编程的领域有一番成就!

版权声明


相关文章:

  • vscode运行php配置_php编程软件2024-11-11 16:09:08
  • Harmony Native C++ 开发简单计算器2024-11-11 16:09:08
  • Mac C++编译安装OpenCV2024-11-11 16:09:08
  • c++编程自学_c++编程用什么软件2024-11-11 16:09:08
  • c++类和对象_python怎么导入math库2024-11-11 16:09:08
  • completablefuture异步编程_pycharm好用的插件2024-11-11 16:09:08
  • 异步编程 js_编程scratch32024-11-11 16:09:08
  • jacobi迭代法迭代次数_迭代法的基本原理2024-11-11 16:09:08
  • cam编程步骤_CAM软件编程2024-11-11 16:09:08
  • cam-tool编程教程_cam编程的基本流程2024-11-11 16:09:08
  • 全屏图片