package mainimport (    "bufio"    "flag"    "fmt"    "io"    "os"    "strconv")var infile *string = flag.String("i", "infile", "File contains values for sorting")var outfile *string = flag.String("o", "outfile", "File to receive sorted values")var algorithm *string = flag.String("a", "qsort", "Sort algorithm")func main() {    flag.Parse()    if infile != nil {        fmt.Println("infile = ", *infile, "outfile = ", *outfile, "algorithm = ", *algorithm)    }    file, err := os.Open(*infile)    if err != nil {        fmt.Println("Failed to open the input file ", *infile)        return    }    defer file.Close()    br := bufio.NewReader(file)    values := make([]int, 0)    for {        line, isPrefix, err1 := br.ReadLine()        if err1 != nil {            if err1 != io.EOF {                err = err1            }            break        }        if isPrefix {            fmt.Println("A too long line,seems unexpected.")            return        }        str := string(line)        value, err1 := strconv.Atoi(str)        if err1 != nil {            err = err1            return        }        values = append(values, value)    }    wfile, ferr := os.Create(*outfile)    if ferr != nil {        fmt.Println("Failed to create the output file", *outfile)        return    }    defer wfile.Close()    length := len(values)    for i := 0; i < length; i++ {        for j := i; j < length; j++ {            if values[i] > values[j] {                values[i], values[j] = values[j], values[i]            }        }        wfile.WriteString(strconv.Itoa(values[i]) + "\n")    }}