go语言之hello world

看到一篇新闻,莫名的想试一试被某些人推崇备至的go语言......

1. 开发环境搭建

【当然可以直接安装已经编译好的二进制包,而且Ubuntu的傻瓜式安装很给力,这里给出的是Ubuntu中的编译步骤】

(1)安装 mercurial工具,为了获得hg命令;

(2)设置环境变量GOROOT

export GOROOT=~/Go

这里当然需要你新建一个Go目录用来作为存放源码的目录......微笑

(3)获取go的源代码

hg clone -r release https://go.googlecode.com/hg/ $GOROOT

网速不好,竟然花了几分钟才把代码搞下来......睡觉

(4)这下终于可以编译源码了......

cd $GOROOT/src

./all.bash

虚拟机里面的Ubuntu编译起来慢得要死......睡觉,慢慢等吧......

编译完成后可以看到输出:

ALL TESTS PASSED

---
Installed Go for linux/386 in /home/xiaohuan/Go
Installed commands in /home/xiaohuan/Go/bin
*** You need to add /home/xiaohuan/Go/bin to your PATH.

(5)需要继续设置环境变量

export PATH=$GOROOT/bin:$PATH

2. 开始写hello world

(1)编写源码

package main
import "fmt"
func main(){
 fmt.Printf("Hello Go!\n")
}

(2)编译源码

go build helloworld.go

(3)执行,可以看到结果

./helloworld

可以看到输出:Hello Go!

3. go语言

【直接copy过来,英文太差就不翻译了】

Go aims to provide the efficiency of astatically typed compiled language with the ease of programming of a dynamiclanguage.[9] Other goals include:

Safety: Type-safe and memory-safe.

Good support for concurrency and communication.

Efficient, latency-free garbage collection.

High-speed compilation.

特性很多,以后有空再玩......微笑

本文来自:CSDN博客

感谢作者:xiaohuan_study

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