mirror of
https://github.com/gopl-zh/gopl-zh.github.com.git
synced 2024-11-05 14:03:45 +00:00
30 lines
488 B
Go
30 lines
488 B
Go
|
// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
|
||
|
|
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
|
||
|
|
|
||
|
|
// See page 244.
|
||
|
|
|
||
|
|
// Countdown implements the countdown for a rocket launch.
|
||
|
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"time"
|
||
|
|
)
|
||
|
|
|
||
|
|
//!+
|
||
|
|
func main() {
|
||
|
|
fmt.Println("Commencing countdown.")
|
||
|
|
tick := time.Tick(1 * time.Second)
|
||
|
|
for countdown := 10; countdown > 0; countdown-- {
|
||
|
|
fmt.Println(countdown)
|
||
|
|
<-tick
|
||
|
|
}
|
||
|
|
launch()
|
||
|
|
}
|
||
|
|
|
||
|
|
//!-
|
||
|
|
|
||
|
|
func launch() {
|
||
|
|
fmt.Println("Lift off!")
|
||
|
|
}
|