channels.go

package main

import ("fmt"
"time"
"strconv")

var pizzaNum = 0
var pizzaName = ""

func makeDough(stringChan chan string) {
	pizzaNum++

	pizzaName = "Pizza #" + strconv.Itoa(pizzaNum)

	fmt.Println("Make Dough and Send for sauce")

	stringChan <- pizzaName

	time.Sleep(time.Millisecond * 10)
}

func addSauce(stringChan chan string) {
	pizza := <- stringChan

	fmt.Println("Add Sauce and Send ", pizza, " for toppings")

	stringChan <- pizzaName

	time.Sleep(time.Millisecond * 10)
}

func addToppings(stringChan chan string) {
	pizza := <- stringChan

	fmt.Println("Add Toppings to", pizza, "and ship")

	time.Sleep(time.Millisecond * 10)
}

func main() {
	stringChan := make(chan string)

	for i := 0; i < 3; i++ {
		go makeDough(stringChan)
		go addSauce(stringChan)
		go addToppings(stringChan)

		time.Sleep(time.Millisecond * 5000)
	}
}