dowaw80220
2014-10-23 20:23 阅读 64
已采纳

fmt.Scanf在Go中无法正常工作

I'm trying out a snippet that is supposed to test out fmt.Scanf, but it doesn't seem to work as expected:

package main

import (
    "fmt"
    "time"
)

func main() {
    fmt.Println("What is your favorite color?")
    var favoriteColor string
    fmt.Scanf("%s", &favoriteColor)
    fmt.Println("Fave color is", favoriteColor)
    fmt.Println("What is your favorite food?")
    var myfood string
    fmt.Scanf("%s", &myfood)
    fmt.Printf("I like %s too!
", myfood)
    fmt.Printf("Wait two seconds please...
")
    time.Sleep(2000 * time.Millisecond)
    fmt.Printf("Your favorite color is %s, and the food you like best is %q
", favoriteColor, myfood)
}

However only the first answer is taken, the program continues to the end and then returns:

What is your favorite color?
red
Fave color is red
What is your favorite food?
I like  too!
Wait two seconds please...
Your favorite color is red, and the food you like best is ""

Why is the second scanf function being ignored? It makes no sense to me.

I installed Go using the most recent 64bit package on Windows 7.

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1条回答 默认 最新

  • 已采纳
    drbvm26000 drbvm26000 2014-10-23 20:30

    Put a after the %s so it consumes the newline you type. Otherwise the newline goes into the next scan.

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