go语言简单的并发控制 —— WaitGroup

package main

import (
	"fmt"
	"sync"
)

func main() {
	wg := sync.WaitGroup{}
	for i := 0; i < 10; i++ {
		wg.Add(1)
		go work(i, &wg)
	}
	wg.Wait()
}
func work(i int, wg *sync.WaitGroup) {
	fmt.Println(i)
	wg.Done()
}