pflag.IntVarP(&(args.startPage), "startPage", "s", -1, "Define startPage")
	pflag.IntVarP(&(args.endPage), "endPage", "e", -1, "Define endPage")
	pflag.IntVarP(&(args.pageLen), "pageLength", "l", 72, "Define pageLength")
	pflag.StringVarP(&(args.printDest), "printDest", "d", "", "Define printDest")
    pflag.BoolVarP(&(args.pageType), "pageType", "f", false, "Define pageType")
```  
### 检查变量和参数名
```go
func checkArgs(args *selpgArgs) {
	if len(os.Args) < 3 {
		fmt.Fprintf(os.Stderr, "\n[Error]The arguments are not enough!\n")
		pflag.Usage()
		os.Exit(1)
	} else if (args.startPage == -1) || (args.endPage == -1) {
		fmt.Fprintf(os.Stderr, "\n[Error]The startPage and endPage can't be empty! Please check your command!\n")
		pflag.Usage()
		os.Exit(2)
	} else if (args.startPage <= 0) || (args.endPage <= 0) {
		fmt.Fprintf(os.Stderr, "\n[Error]The startPage and endPage can't be negative! Please check your command!\n")
		pflag.Usage()
		os.Exit(3)
	} else if args.startPage > args.endPage {
		fmt.Fprintf(os.Stderr, "\n[Error]The startPage can't be bigger than the endPage! Please check your command!\n")
		pflag.Usage()
		os.Exit(4)
	} else if (args.pageType == true) && (args.pageLen != 72) {
		fmt.Fprintf(os.Stderr, "\n[Error]The command -l and -f are exclusive, you can't use them together!\n")
		pflag.Usage()
		os.Exit(5)
	} else if args.pageLen <= 0 {
		fmt.Fprintf(os.Stderr, "\n[Error]The pageLen can't be less than 1 ! Please check your command!\n")
		pflag.Usage()
		os.Exit(6)
	} else {
		pageType := "page length."
		if args.pageType == true {
			pageType = "The end sign /f."
		}
		fmt.Printf("\n[ArgsStart]\n")
		fmt.Printf("startPage: %d\nendPage: %d\ninputFile: %s\npageLength: %d\npageType: %s\nprintDestation: %s\n[ArgsEnd]", args.startPage, args.endPage, args.inFileName, args.pageLen, pageType, args.printDest)
	}

}

func excuteCMD(args *selpgArgs) {
	var fin *os.File
	if args.inFileName == "" {
		fin = os.Stdin
	} else {
		checkFileAccess(args.inFileName)
		var err error
		fin, err = os.Open(args.inFileName)
		checkError(err, "File input")
	}

	if len(args.printDest) == 0 {
		output2Des(os.Stdout, fin, args.startPage, args.endPage, args.pageLen, args.pageType)
	} else {
		output2Des(cmdExec(args.printDest), fin, args.startPage, args.endPage, args.pageLen, args.pageType)
	}
}