初学乍练，求教怎么让协程交替执行

```go package main import ( "fmt" "time" ) func main() { waitOdd := make(chan struct{}, 1) waitEnev := make(chan struct{}, 1) waitEnev <- struct{}{} go odd(waitOdd, waitEnev) go enev(waitOdd, waitEnev) time.Sleep(3 * time.Minute) } func odd(waitodd, waitenev chan struct{}) { for i := 0; i < 10; i++ { <-waitodd fmt.Println(i*2 + 1) waitenev <- struct{}{} } } func enev(waitodd, waitenev chan struct{}) { for i := 0; i < 10; i++ { <-waitenev fmt.Println(i * 2) waitodd <- struct{}{} } } ```

试试这样： ```go func main() { runtime.GOMAXPROCS(1) c1 := make(chan struct{}, 1) c2 := make(chan struct{}, 1) for i := 1; i <= 10; i++ { go func(i int) { <-c1 fmt.Println(2*i - 1) c2 <- struct{}{} }(i) } for i := 1; i <= 10; i++ { go func(i int) { <-c2 fmt.Println(2 * i) c1 <- struct{}{} }(i) } c1 <- struct{}{} c2 <- struct{}{} time.Sleep(3 * time.Second) } ```

试试我的歪招，哈哈 ```go package main import ( "fmt" "time" ) func main() { c1 := make(chan int) c2 := make(chan int) go func() { for i := 1; i <= 10; i++ { <-c1 go func(i int) { fmt.Println(2*i - 1) c2<-1 }(i) } }() go func() { for i := 1; i <= 10; i++ { <-c2 go func(i int) { fmt.Println(2 * i) c1 <- 1 }(i) } }() c1<-1 time.Sleep(3 * time.Second) } ```