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fmt: How can I empty input stream? The fmt.Scanf in a main cannot use more than 2 times, the second will appear to skip a need for input. #13608

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CodyGuo opened this issue Dec 14, 2015 · 4 comments
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fmt: How can I empty input stream? The fmt.Scanf in a main cannot use more than 2 times, the second will appear to skip a need for input. #13608

CodyGuo opened this issue Dec 14, 2015 · 4 comments
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@CodyGuo
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CodyGuo commented Dec 14, 2015

How can I empty input stream?

package main

import (
"fmt"
)

func main() {
var a int
var f float32
var str string

fmt.Print("Please input : ")
fmt.Scanf("%d %f %s", &a, &f, &str)
fmt.Println("Output: ", a, f, str)

fmt.Println("----------------------------")

var sIP, sMac string
fmt.Print("Please input: ")
fmt.Scanf("%s %s", &sIP, &sMac)

fmt.Println("Output: ", sIP, sMac)

}

OUTPUT：
Please input : 1 3.24 hello

Output: 1 3.24 hello

Please input: Output:
@davecheney
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Duplicate of #13607.

Please do not ask questions on the issue tracker. The issue tracker is only for bugs.

Please see https://github.com/golang/go/wiki/Questions

@CodyGuo
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CodyGuo commented Dec 14, 2015

I'm sorry, I don't have access to mailing lists and BBS address.

@davecheney
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@CodyGuo I'm sorry to hear that. We cannot have a discussion on the issue tracker. I have heard there is a cn language mailing list, perhaps they can help. /cc @minux

@CodyGuo
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CodyGuo commented Dec 14, 2015

Thank you, I found the solution.
/ / initialize the stdin
os. Stdin = os. NewFile (uintptr (syscall. Stdin), "/ dev/stdin")

@dr2chase dr2chase mentioned this issue May 20, 2016
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@davecheney @gopherbot @CodyGuo