Re: [boost] Concatenating int value to string ..??

Subject: Re: [boost] Concatenating int value to string ..??
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2013-11-02 05:09:29

On Saturday 02 November 2013 14:14:18 Rahul Mathur wrote:
> All,
> 
> I wish to have string (combination of string value and int value) which
> increments until 100. The code is as below -
> 
> ---
> #include <iostream>
> #include <cstdlib>
> #include <string>
> #include <boost/lexical_cast.hpp>
> 
> using namespace std;
> 
> int main() {
>         std::string TID = "Apple";
>         int TagID = 01, Value = 000 /* 100 IDs*/;
>         std::string TagName, TagInitial, TagUId;
>         TagName = TID + boost::lexical_cast<std::string>(TagID); // Should
> be as -> Apple01
>         TagInitial = TagName + boost::lexical_cast<std::string>(Value); //
> Should be as -> Apple01000
>         int i = boost::lexical_cast<int>(TagInitial) + 1; // Should be as
> -> Apple01001
>         TagUId = boost::lexical_cast<std::string>(i);
>         std::cout << "Tag ID .." << TagUId << endl;
> }
> 
> I get below error message -
> 
> --
> terminate called after throwing an instance of
> 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_inj
> ector<boost::bad_lexical_cast>
> >'
> 
>   what():  bad lexical cast: source type value could not be interpreted as
> target
> Aborted (core dumped)
> --
> 
> Any clue?

Apple01000 cannot be interpreted as an integer, that's why 
boost::lexical_cast<int>(TagInitial) throws.