package huawei import (     "errors"     "fmt"     "strconv"     "strings" ) func Test6Base() {     s := "2115 22 2128 3115 4119 2016 2119"     findIndex := 2     result, err := findString(s, findIndex)     if err == nil {         fmt.Println("result:", result)     } else {         fmt.Println("Error:", err.Error())     } } //将resString按照指定规则排序，然后返回索引为findIndex位置的字符串 func findString(resString string, findIndex int) (result int, err error) {     if resString == "" {         return -1, errors.New("Param resString is an empty string.")     }     numsStr := strings.Fields(resString)     if findIndex < 0 || findIndex > len(numsStr)-1 {         return -1, errors.New("Param findIndex is invalid.")     }     numsInt := convertToInt(numsStr)     //冒泡排序(稳定)     var change bool = false     for i := 0; i < len(numsInt)-1; i++ {         change = false         for j := 1; j < len(numsInt)-i; j++ {             if numsInt[j]00 < numsInt[j-1]00 {                 change = true                 numsInt[j], numsInt[j-1] = numsInt[j-1], numsInt[j]             }         }         if !change {             break         }     }     fmt.Println(numsInt)     return numsInt[findIndex], nil } //将[]string转为[]int func convertToInt(numsStr []string) []int {     numsInt := make([]int, len(numsStr))     for i, v := range numsStr {         n, err := strconv.Atoi(v)         checkError(err, "string to integer")         numsInt[i] = n     }     return numsInt }