go 基本语法

Posted 2021-03-22 dqh123

====type====

import (
	"fmt"
	)

func main()  {
	type bigint byte //定义类型
	var a  bigint
	fmt.Printf("a type is %T
",a)
	type(
		long int64
		char byte
	)
	var b char =‘a‘
    var c long =1000

	fmt.Printf("b=%c,c=%d",b,c)




========channel========

package main

import (
	"time"
	"fmt"
)

func test_channel()  {
	//ch:=make(chan int)
	ch<-1
	ch<-1
	fmt.Println("come to end go runtime 1")
}

var  ch  chan  int
func main()  {
	ch =make(chan int,0)
	go test_channel()
	time.Sleep(2* time.Second)
	fmt.Println("runing end")
	<-ch
	time.Sleep(time.Second)
}

=====协程==========
package main

import (
	"fmt"
	"time"
)

func test_Rou(){
	fmt.Println("ddd")
}
func Add (x,y int){
	z:=x+y
	fmt.Println(z)
}
func main()  {	
	go test_Rou()
	for index := 0; index < 10; index++ {
		go Add(index,index)
	}
	time.Sleep(10)
}