###### dongxibo2095
2016-09-19 03:47 阅读 237

# 在Golang中读取一组由空格分隔的整数

I want to read a set of integer values from stdin and put it into integer slice. What is the fastest way to do that without using `for` loop.

e.g.

``````Enter the number of integers
3
Enter the integers
23 45 66
``````

How can I put these values in an integer slice?

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#### 2条回答默认 最新

• 已采纳
dpd2349 2016-09-19 04:51

Anyway there is a loop, Here without `for` and `goto` loop ( try it on The Go Playground):

``````package main

import "fmt"

func main() {
fmt.Println(`Enter the number of integers`)
var n int
if m, err := Scan(&n); m != 1 {
panic(err)
}
fmt.Println(`Enter the integers`)
all := make([]int, n)
ReadN(all, 0, n)
fmt.Println(all)
}

func ReadN(all []int, i, n int) {
if n == 0 {
return
}
if m, err := Scan(&all[i]); m != 1 {
panic(err)
}
ReadN(all, i+1, n-1)
}

func Scan(a *int) (int, error) {
return fmt.Scan(a)
}
``````

io:

``````Enter the number of integers
3
Enter the integers
10 20 30
[10 20 30]
``````

For faster input scanning rewrite:

``````func Scan(a *int) (int, error) {
return fmt.Scan(a)
}
``````

using:
Faster input scanning

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• duanhe1976 2017-11-09 19:58

Simpler solution using loop without the need for using recursion function:

``````    var n int

if _, err := fmt.Scan(&n); err != nil {
panic(err)
}

arr := make([]int, n)

for i := 0;i<n;i++{

if _, err := fmt.Scan(&arr[i]); err != nil {
panic(err)
}
}

fmt.Println(arr)
``````
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