Re: [Boost-users] [boost-users] [program options]

The problem is that your user still has to enter the keys like: appname.exe --key="public key" --key="secret key" And if the user enters: appname.exe --key="secret key" --key="public key" How do you know which is the right one? The best solution would be to enforce to specify public and secret params: appname.exe public="public key" secret="secret key" The last point also applies to my previous post. This way you will avoid some errors for your users. Best Regards, Ovanes On 11/2/07, Edwin Savarimuthu wrote:

You can use something like this as well.

std::vectorstd::string key_pair; ("secert", boost::program_options::value< std::vectorstd::string

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(&key_pair), "creates the share secret key");

Then you can do you error checks ...

if ( key_pair.size() == 2 ) { // Do your processing here } else { // error }

This example uses string vector. I guess std::vector<BigInteger> should also work for you.

Thanks, Edwin

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One more addition:

boost::tuple key_pair;

This will not parse your key. You need to do it manually. So your param should be std::string. And than you can tokenize you string. Or you define 2 separate params and let program_options parse them into Integers for you. But I am unsure if this is supported. Probably yes. I am 100% sure

On 10/31/07, Ovanes Markarian wrote: program

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options will not tokenize one param for you. May be only if your key_pair supports construction from a space separted string.

Regards, Ovanes

On 10/31/07, Ovanes Markarian wrote:

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Hi!

On 10/31/07, chun ping wang wrote:

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HI how would I use program options to accept multiple input.

The thing compiles but when I do DiffieHellman.exe --secert 817 697

I get this error. C:\CPW\cs_classes>DiffieHellmanEncrypt --secert 817 697 terminate called after throwing an instance of 'boost::program_options::invalid_ option_value' what(): in option 'secert': invalid option value '817'

This application has requested the Runtime to terminate it in an

unusual

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way. Please contact the application's support team for more information.

the option is in your case:

--secert="817 697"

Regards, Ovanes

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