让两个协程交替打印1-100

package main

import "fmt"

func main() {
   numChan := make(chan int)
   exitChan := make(chan struct{})
   go func() {
      for i := 1; i <= 101; i = i + 2 {
         result, ok := <-numChan
         if ok && result <= 100 {
            fmt.Println("goroutine0 : ", result)
            }
         numChan <- i
         }
      }()
   go func() {
      defer close(exitChan)
      for i := 0; i <= 100; i = i + 2 {
         numChan <- i
         result, ok := <-numChan
         if ok && result <= 100 {
            fmt.Println("goroutine1 : ", result)
            }
         }
      }()
   <-exitChan
   }