(Go)04.go工作区目录规范及简单例子

一.规范目录结构

D:\project\src\go_dev\day1\example1

二.设置GOPAH环境变量

三.hello world

1.hello world

 package main

 import (

     "fmt"

 )

 func main () {

     fmt.Println("Hello World!")

 }

go build go_dev\day1\example1

生成example1.exe

执行example1.exe

2.goroute循环

goroute.go

 package main

 import (

     "fmt"

 )

 func test_goroute(a int) {

     fmt.Println(a)

 }

main.go

 package main

 import (

     "time"

 )

 func main() {

     for i :=; i <; i++ {

         go test_goroute(i)

     }

     time.Sleep(*time.Second)

 }

3.goroute_example

代码目录结构

 package goroute

 func Add(a int, b int, c chan int) {

     sum := a + b

     c <- sum

 }

add.go

 package main

 import (

     "go_dev/day1/goroute_example/goroute"

     "fmt"

 )

 func main() {

     //var pipe chan int

     //pipe = make(chan int, 1) 

     pipe := make(chan int, )   //等同于上二行

     go goroute.Add(, , pipe)

     sum := <- pipe

     fmt.Println("sum =", sum)

 }

main.go

构建代码

D:\project>go build -o bin/goroute_example.exe go_dev/day1/goroute_example/main

D:\project\bin>goroute_example.exe

sum = 400

巴特西