如何给Go程序添加暂停功能?

huangapple go评论90阅读模式
英文:

How to add pause to a Go program?

问题

当我执行一个Go控制台程序时,它只会在一秒钟内执行完毕,我已经在Google、Go官网和Stackoverflow上搜索过了。

import (
    "fmt"
)

func main() {
    fmt.Println()
}

当我执行它时,它立即关闭。

编辑2
实际上,我希望程序能够永久暂停,直到用户按下一个按钮。

英文:

When i ever execute a Go Console program it just executes in one second, I've been looking on Google, the Go website and Stackoverflow.

import (
    "fmt"
)

func main() {
    fmt.Println()
}

It closes immediately when i execute it.

EDIT 2
actually i wanted the program to permanently stay paused untill the user presses a button

答案1

得分: 87

你可以使用time.Sleep()来暂停程序任意长的时间。例如:

package main
import ("fmt"
        "time"
       )   

func main() {
  fmt.Println("Hello world!")
  duration := time.Second
  time.Sleep(duration)
}

要任意增加暂停的时间,可以这样做:

duration := time.Duration(10)*time.Second // 暂停10秒

编辑:由于问题的提问者增加了额外的限制,上面的答案不再适用。你可以通过创建一个新的缓冲读取器来暂停,直到按下<kbd>Enter</kbd>键为止,该读取器等待读取换行符(\n)字符。

package main
import ("fmt"
        "bufio"
        "os"
       )

func main() {
  fmt.Println("Hello world!")
  fmt.Print("按下'Enter'键继续...")
  bufio.NewReader(os.Stdin).ReadBytes('\n') 
}
英文:

You can pause the program for an arbitrarily long time by using time.Sleep(). For example:

package main
import ( &quot;fmt&quot;
         &quot;time&quot;
       )   

func main() {
  fmt.Println(&quot;Hello world!&quot;)
  duration := time.Second
  time.Sleep(duration)
}

To increase the duration arbitrarily you can do:

duration := time.Duration(10)*time.Second // Pause for 10 seconds

EDIT: Since the OP added additional constraints to the question the answer above no longer fits the bill. You can pause until the <kbd>Enter</kbd> key is pressed by creating a new buffer reader which waits to read the newline (\n) character.

package main
import ( &quot;fmt&quot;
         &quot;bufio&quot;
         &quot;os&quot;
       )

func main() {
  fmt.Println(&quot;Hello world!&quot;)
  fmt.Print(&quot;Press &#39;Enter&#39; to continue...&quot;)
  bufio.NewReader(os.Stdin).ReadBytes(&#39;\n&#39;) 
}

答案2

得分: 26

package main

import "fmt"

func main() {
fmt.Println("按下回车键以终止控制台屏幕!")
fmt.Scanln() // 等待回车键
}

英文:
package main

import &quot;fmt&quot;

func main() {
    fmt.Println(&quot;Press the Enter Key to terminate the console screen!&quot;)
    fmt.Scanln() // wait for Enter Key
}

答案3

得分: 15

最简单的另一种方法是使用最少的导入,使用以下两行代码:

var input string
fmt.Scanln(&input)

在程序的末尾添加这行代码,将暂停屏幕,直到用户按下回车键,例如:

package main

import "fmt"

func main() {
    fmt.Println("按下回车键以终止控制台屏幕!")
    var input string
    fmt.Scanln(&input)
}
英文:

The easiest another way with minimal imports use this 2 lines :

var input string
fmt.Scanln(&amp;input)

Adding this line at the end of the program, will pause the screen until user press the Enter Key, for example:

package main

import &quot;fmt&quot;

func main() {
    fmt.Println(&quot;Press the Enter Key to terminate the console screen!&quot;)
    var input string
    fmt.Scanln(&amp;input)
}

答案4

得分: 0

我只使用了一行代码fmt.Scanln

英文:
import &quot;fmt&quot;

func main() {
    fmt.Scanln()
}

I use fmt.Scanln just one line.

huangapple
  • 本文由 发表于 2013年7月17日 11:51:37
  • 转载请务必保留本文链接:https://go.coder-hub.com/17690776.html
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