golang：协程通信小case

题目：
	A协程只输出0；
	B协程只输出奇数；
	C协程只输出偶数；
	三个协程完成协程间通信：
	例：PrintNumber(5)
	输出：0 1 0 2 0 3 0 4 0 5

package test

import (
	"fmt"
	"testing"
)

func PrintNumber(n int){
	ch := make(chan bool, n)
	inOdd := make(chan int, n)
	inEven := make(chan int, n)
	exitChan := make(chan bool, n)
	go printZero(ch, inEven, inOdd, n, exitChan)
	go printEven(inEven, ch)
	go printOdd(inOdd, ch)
	for i:=0; i<n; i++ {
		<- exitChan
	}
}


func printZero(ch chan bool, inEven chan int, inOdd chan int, n int, exitChan chan bool){
	for i:=0; i<n; i++ {
		fmt.Printf("0 ")
		if i%2 == 0 {
			inOdd <- i+1
		} else {
			inEven <- i+1
		}
		<- ch
		exitChan <- true
	}
}

func printOdd(ch chan int, inZero chan bool){
	for{
		num := <- ch
		fmt.Printf("%v ", num)
		inZero <- true
	}
}

func printEven(ch chan int, inZero chan bool){
	for{
		num := <- ch
		fmt.Printf("%v ", num)
		inZero <- true
	}
}


func TestChan(t *testing.T){
	PrintNumber(10)
}