题解 | #配置文件恢复#

Golang题解

package main

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

var output = map[string]string {
    "reset": "reset what",
    "reset board": "board fault",
    "board add": "where to add",
    "board delete": "no board at all",
    "reboot backplane": "impossible",
    "backplane abort": "install first",
}

var cmds = [][]string {
    []string{"reset"},
    []string{"reset", "board"},
    []string{"board", "add"},
    []string{"board", "delete"},
    []string{"reboot", "backplane"},
    []string{"backplane", "abort"},
}

func main() {
    sc := bufio.NewScanner(os.Stdin)
    for sc.Scan() {
        cmd := sc.Text()
        subCmd := strings.Fields(cmd)
        switch len(subCmd) {
        case 1:
            if strings.HasPrefix("reset", cmd) {
                fmt.Println(output["reset"])
            } else {
                fmt.Println("unknown command")
            }
        case 2:
            index := -1
            for i := 1; i < 6; i++ {
                if strings.HasPrefix(cmds[i][0], subCmd[0]) && strings.HasPrefix(cmds[i][1], subCmd[1]) {
                    if index != -1 {
                        index = -1
                        break
                    }
                    index = i
                }
            }
            if index != -1 {
                fmt.Println(output[strings.Join(cmds[index], " ")])
            } else {
                fmt.Println("unknown command")
            }
        default:
            fmt.Println("unknown command")
        }
    }
}