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Command Line Option Validation

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  Command Line Option Validation willmann817@gmail.com - 2014-04-14 17:08 -0700
    Re: Command Line Option Validation Ian Collins <ian-news@hotmail.com> - 2014-04-15 12:36 +1200
    Re: Command Line Option Validation Malcolm McLean <malcolm.mclean5@btinternet.com> - 2014-04-15 00:58 -0700

#42926 — Command Line Option Validation

when the user runs my program from the command line I require them to type

myProgram -k <some_value> 

<some_value> needs to be a positive integer between 1 and 100.  How do I assure they do not type in a string or something like that.  Here is what I have so far but I am not sure what to do from here?

int main(int argc, char *argv []){
    //Getting command line arguments using getopt.
    while((ch = getopt(argc, argv, "k:m:s")) != EOF){ 
        switch(ch){
            case "k":
                if

        }
    }


}

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#42928

willmann817@gmail.com wrote:
> when the user runs my program from the command line I require them to
> type
>
> myProgram -k <some_value>
>
> <some_value> needs to be a positive integer between 1 and 100.  How
> do I assure they do not type in a string or something like that.
> Here is what I have so far but I am not sure what to do from here?
>
 > int main(int argc, char *argv []){
 >      //Getting command line arguments using getopt.
 >      while((ch = getopt(argc, argv, "k:m:s")) != EOF){
 >          switch(ch){
 >              case "k":
 >                  if

Use strtol to parse the the appropriate argv value and check the result.

-- 
Ian Collins

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#42953

On Tuesday, April 15, 2014 1:08:11 AM UTC+1, William Koch wrote:
> when the user runs my program from the command line I require them to type
>
> myProgram -k <some_value> 
> 
> <some_value> needs to be a positive integer between 1 and 100.  How do 
> I assure they do not type in a string or something like that.  Here is 
> what I have so far but I am not sure what to do from here?
>
> int main(int argc, char *argv []){
> 
>     //Getting command line arguments using getopt. 
>     while((ch = getopt(argc, argv, "k:m:s")) != EOF){ 
>         switch(ch){
>             case "k":
>                 if
>
>         }
> 
>     } 
> 
> }

Go onto my website
http://www.malcolmmclean.site11.com/www/

and download the options parser. It does that type of validation for you.
The code's easy to read.

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