gopl-zh.github.com/vendor/gopl.io/ch7/sleep/sleep.go

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// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
// See page 179.
// The sleep program sleeps for a specified period of time.
package main
import (
"flag"
"fmt"
"time"
)
//!+sleep
var period = flag.Duration("period", 1*time.Second, "sleep period")
func main() {
flag.Parse()
fmt.Printf("Sleeping for %v...", *period)
time.Sleep(*period)
fmt.Println()
}
//!-sleep