pingpong.go

package main

import (
	"fmt"
	"time"
)

func player(from chan int, to chan int, end chan int) {
	for {
		v := <-from
		to <- v + 1
		if v >= 100000 {
			end <- v
			return
		}
	}
}

func main() {
	t0 := time.Now()
	c1 := make(chan int)
	c2 := make(chan int)
	c3 := make(chan int)
	go player(c1, c2, c3)
	go player(c2, c1, c3)
	c1 <- 1
	res := <-c3
	t1 := time.Now()
	fmt.Println("got ", res, " ", t1.Sub(t0))
}