在golang阅读一行 [英] Read line in golang
问题描述
scanner:= bufio.NewScanner(os.Stdin)
for scanner.Scan(){
fmt.Println(scanner.Text())
}
或 p>
reader:= bufio.NewReader(os.Stdin)
text,_:= reader.ReadString('\\\
')
两者都不适用于我的情况。我无法找到新行扫描无效的原因。
以下是我正在处理的问题: https://www.hackerrank.com/challenges/30-dictionaries-and-maps
以下是我的代码:
package main
import(
fmt
bufio
os
strings
)
func main(){
var count int
fmt.Scan(& count)
m:= make(map [string] string)
for i:= 0; I<计数; i ++ {
reader:= bufio.NewReader(os.Stdin)
text,err:= reader.ReadString('\\\
')
if err!= nil {
fmt.Println(err)
}
value:= strings.Fields(text)
m [value [0]] = value [1]
}
var name [] string
for i:= 0; I<计数; i ++ {
var name name
fmt.Scan(& name)
names = append(names,name)
}
for j:= 0; j< len(names); j ++ {
if m [names [j]]!={
fmt.Println(names [j] +=+ m [names [j]] )
} else {
fmt.Println(未找到)
}
}
}
code>
它在我的编辑器中工作,但当我使用问题的输入时,它不起作用。
按照评论的要求,这是我的工作示例:
func main(){
phonebook:= make(map [string] int)
var count int
fmt.Scan(& count)
for i := 0;我<计数; i ++ {
var name string
var number int
fmt.Scan(& name,& number)
phonebook [name] = number
}
scanner:= bufio.NewScanner(os.Stdin)
用于scanner.Scan(){
名称:= scanner.Text()
如果数字,ok:= phonebook [名称]; OK {
fmt.Printf(%s =%d \ n,姓名,号码)
}其他{
fmt.Println(找不到)
}
}
}
There are so many option to do this in Go. For example:
scanner := bufio.NewScanner(os.Stdin)
for scanner.Scan() {
fmt.Println(scanner.Text())
}
or
reader := bufio.NewReader(os.Stdin)
text, _ := reader.ReadString('\n')
Neither is working in my case. I am unable to find the reason why new line scan is not working.
Here's the question I'm working on: https://www.hackerrank.com/challenges/30-dictionaries-and-maps
And here's my code:
package main
import (
"fmt"
"bufio"
"os"
"strings"
)
func main() {
var count int
fmt.Scan(&count)
m := make(map[string]string)
for i := 0; i<count; i++{
reader := bufio.NewReader(os.Stdin)
text,err := reader.ReadString('\n')
if err != nil {
fmt.Println(err)
}
value := strings.Fields(text)
m[value[0]] = value[1]
}
var names []string
for i := 0; i<count; i++{
var name string
fmt.Scan(&name)
names = append(names,name)
}
for j:= 0; j<len(names);j++{
if m[names[j]] != ""{
fmt.Println(names[j] +" = "+ m[names[j]])
}else{
fmt.Println("Not found")
}
}
}
It is working in my editor, but when I use the question's input, it doesn't work.
As requested in the comments, here was my working example:
package main
import (
"bufio"
"fmt"
"os"
)
func main() {
phonebook := make(map[string]int)
var count int
fmt.Scan(&count)
for i := 0; i < count; i++ {
var name string
var number int
fmt.Scan(&name, &number)
phonebook[name] = number
}
scanner := bufio.NewScanner(os.Stdin)
for scanner.Scan() {
name := scanner.Text()
if number, ok := phonebook[name]; ok {
fmt.Printf("%s=%d\n", name, number)
} else {
fmt.Println("Not found")
}
}
}
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