快看点丨go的数据类型-其他数据类型-channel（二）

package mainimport ("fmt""time")func worker(id int, jobs <-chan int, results chan<- int) {for j := range jobs {fmt.Printf("worker %d started job %d\n", id, j)time.Sleep(time.Second)fmt.Printf("worker %d finished job %d\n", id, j)results <- j * 2}}func main() {jobs := make(chan int, 100)results := make(chan int, 100)for w := 1; w <= 3; w++ {go worker(w, jobs, results)}for j := 1; j <= 9; j++ {jobs <- j}close(jobs)for a := 1; a <= 9; a++ {<-results}}