04.go工作区目录规范

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 package main
2 
3 import (
4     "fmt"
5 )
6 
7 func main () {
8     fmt.Println("Hello World!")
9 }

go build go_dev\day1\example1

 

生成example1.exe

执行example1.exe

goroute循环

goroute.go

1 package main
2 
3 import (
4     "fmt"
5 )
6 
7 func test_goroute(a int) {
8     fmt.Println(a) 
9 }

main.go

 1 package main
 2 
 3 import (
 4     "time"
 5 )
 6 
 7 
 8 func main() {
 9 
10     for i :=0; i <100; i++ {
11         go test_goroute(i)
12     }
13     time.Sleep(2*time.Second)
14 }