读取用户的输入数据

我们怎样读取用户从键盘（控制台）输入的数据？输入指从键盘或其它标准输入（os.Stdin）读取数据。最简单的方法是使用fmt包里的Scan-或Sscan-系列函数，下面用个例子说明一下：

package main

import "fmt"

func main() {
    var name, school, str, sex string
    var height float64
    str = "1.81 man"
    fmt.Scanln(&name)
    fmt.Println("your name is: ", name)
    fmt.Scanf("%s", &school)
    fmt.Printf("your school is : %s\n", school)
    fmt.Sscanf(str, "%f %s", &height, &sex)
    fmt.Println("your height is : ", height, "m", ", and you are a ", sex)
}

程序运行:

siskinc
your name is:  siskinc
suse
your school is : suse
your height is :  1.81 m , and you are a  man

Process finished with exit code 0

另外，我们也可以使用 bufio包里带缓冲的Reader,例如:

package main

import (
    "bufio"
    "os"
    "fmt"
)

func main() {
    inputReader := bufio.NewReader(os.Stdin)
    fmt.Println("Please input your name:")
    input, err := inputReader.ReadString('\n')
    if err != nil {
        fmt.Printf("Found an error: %s\n", err)
    } else {
        input = input[:len(input)-1]
        fmt.Printf("Hello, %s\n", input)
    }
}

程序运行:

package main

import (
    "bufio"
    "os"
    "fmt"
)

func main() {
    inputReader := bufio.NewReader(os.Stdin)
    fmt.Println("Please input your name:")
    input, err := inputReader.ReadString('\n')
    if err != nil {
        fmt.Printf("Found an error: %s\n", err)
    } else {
        input = input[:len(input)-1]
        fmt.Printf("Hello, %s\n", input)
    }
}