不在 golang 中打印一系列变量

Question

我正在学习 Golang 使用 go v1.18 得到一些奇怪的输出当我打印时firstName, lastName, birthday, created只得到结果因为created 我已经打印声明变量并再次打印整个东西它工作正常问题是var reader = bufio.NewReader(os.Stdin)package mainimport (    "bufio"    "fmt"    "os"    "strings"    "time")var reader = bufio.NewReader(os.Stdin)func main() {    firstName := getUserData("Enter First Name: ")    lastName := getUserData("Enter Last Name: ")    birthdate := getUserData("Enter Date of Birth: ")    created := time.Now()    fmt.Println(firstName, lastName, birthdate, created) //only prints created    fmt.Println(firstName) // prints firstName    fmt.Println(lastName) // prints lastName    fmt.Println(birthdate) // prints birthdate    fmt.Println(created) // prints created}func getUserData(promptText string) string {    fmt.Print(promptText)    userInput, _ := reader.ReadString('\n')    cleanedInput := strings.Replace(userInput, "\n", "", -1)    return cleanedInput}

Answer 1

你必须使用strings.TrimSpace而不是strings.Replace 因为在你的代码中你没有删除回车\r

请参阅下面更正后的代码。

package main

import (

    "bufio"

    "fmt"

    "os"

    "strings"

    "time"

)

var reader = bufio.NewReader(os.Stdin)

func main() {

    firstName := getUserData("Enter First Name: ")

    lastName := getUserData("Enter Last Name: ")

    birthdate := getUserData("Enter Date of Birth: ")

    created := time.Now()

    fmt.Println(firstName, lastName, birthdate, created) //will print all

    fmt.Println(firstName)                               // prints firstName

    fmt.Println(lastName)                                // prints lastName

    fmt.Println(birthdate)                               // prints birthdate

    fmt.Println(created)                                 // prints created

}

func getUserData(promptText string) string {

    fmt.Print(promptText)

    userInput, _ := reader.ReadString('\n')

    cleanedInput := strings.TrimSpace(userInput)

    return cleanedInput

}