dev-cpp-users

[Dev-C++] Vector and algorithms

[Alessandro B. <ale...@is...>]

Hello, I wrote this method and I receive an error message in compilation:

bool Dizionario::inDictionary(const string &a) const
{
    vector<string>::iterator result =
        find( elenco.begin(), elenco.end(), a );
    if (result == elenco.end()) return false;
    return true;  
}

598 C:\Programmi\Dev-Cpp\include\c++\3.3.1\bits\stl_iterator.h invalid  
conversion from `const std::string* const' to `std::string*'

I wonder the problem is in elenco.begin() and elenco.end() and the const 
method (if I erase the keyword const the program is OK, but I don't want 
remove const because the method is const).
Have I cast elenco.begin() and elenco.end()? In which mode?
Thanks
Alessandro

-- 
************************************************
Prof. Alessandro Bugatti
Docente di Informatica
Istituto Tecnico Industriale Statale B. Castelli
E-mail: ale...@is...
Sito web: www.imparando.net
************************************************

Re: [Dev-C++] Vector and algorithms

[Per W. <pw...@ia...>]

Don't you think it would help if your mail also contains the
declaration for elenco?

/pwm

On Mon, 12 Nov 2007, Alessandro Bugatti wrote:

> Hello, I wrote this method and I receive an error message in compilation:
>
> bool Dizionario::inDictionary(const string &a) const
> {
>     vector<string>::iterator result =
>         find( elenco.begin(), elenco.end(), a );
>     if (result == elenco.end()) return false;
>     return true;
> }
>
> 598 C:\Programmi\Dev-Cpp\include\c++\3.3.1\bits\stl_iterator.h invalid
> conversion from `const std::string* const' to `std::string*'
>
> I wonder the problem is in elenco.begin() and elenco.end() and the const
> method (if I erase the keyword const the program is OK, but I don't want
> remove const because the method is const).
> Have I cast elenco.begin() and elenco.end()? In which mode?
> Thanks
> Alessandro
>
> --
> ************************************************
> Prof. Alessandro Bugatti
> Docente di Informatica
> Istituto Tecnico Industriale Statale B. Castelli
> E-mail: ale...@is...
> Sito web: www.imparando.net
> ************************************************
>
>
> -------------------------------------------------------------------------
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Re: [Dev-C++] Vector and algorithms

[Per W. <pw...@ia...>]

Anyway, it is a common problem with C++ and const methods

EMA System        email: pw...@ia...
Per Westermark    web: http://iapetus.neab.net
Vargvaegen 174B   phone: +46 70 214 74 48
S-906 42 Umeaa
Sweden


On Tue, 13 Nov 2007, Per Westermark wrote:

> Don't you think it would help if your mail also contains the
> declaration for elenco?
>
> /pwm
>
> On Mon, 12 Nov 2007, Alessandro Bugatti wrote:
>
> > Hello, I wrote this method and I receive an error message in compilation:
> >
> > bool Dizionario::inDictionary(const string &a) const
> > {
> >     vector<string>::iterator result =
> >         find( elenco.begin(), elenco.end(), a );
> >     if (result == elenco.end()) return false;
> >     return true;
> > }
> >
> > 598 C:\Programmi\Dev-Cpp\include\c++\3.3.1\bits\stl_iterator.h invalid
> > conversion from `const std::string* const' to `std::string*'
> >
> > I wonder the problem is in elenco.begin() and elenco.end() and the const
> > method (if I erase the keyword const the program is OK, but I don't want
> > remove const because the method is const).
> > Have I cast elenco.begin() and elenco.end()? In which mode?
> > Thanks
> > Alessandro
> >
> > --
> > ************************************************
> > Prof. Alessandro Bugatti
> > Docente di Informatica
> > Istituto Tecnico Industriale Statale B. Castelli
> > E-mail: ale...@is...
> > Sito web: www.imparando.net
> > ************************************************
> >
> >
> > -------------------------------------------------------------------------
> > This SF.net email is sponsored by: Splunk Inc.
> > Still grepping through log files to find problems?  Stop.
> > Now Search log events and configuration files using AJAX and a browser.
> > Download your FREE copy of Splunk now >> http://get.splunk.com/
> > _______________________________________________
> > Dev-cpp-users mailing list
> > Dev...@li...
> > TO UNSUBSCRIBE: http://www23.brinkster.com/noicys/devcpp/ub.htm
> > https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
> >
>
>
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Re: [Dev-C++] Vector and algorithms

[Alessandro B. <ale...@is...>]

Sorry,

vector <string> elenco;

Alessandro

Per Westermark ha scritto:
> Don't you think it would help if your mail also contains the
> declaration for elenco?
>
> /pwm
>
> On Mon, 12 Nov 2007, Alessandro Bugatti wrote:
>
>   
>> Hello, I wrote this method and I receive an error message in compilation:
>>
>> bool Dizionario::inDictionary(const string &a) const
>> {
>>     vector<string>::iterator result =
>>         find( elenco.begin(), elenco.end(), a );
>>     if (result == elenco.end()) return false;
>>     return true;
>> }
>>
>> 598 C:\Programmi\Dev-Cpp\include\c++\3.3.1\bits\stl_iterator.h invalid
>> conversion from `const std::string* const' to `std::string*'
>>
>> I wonder the problem is in elenco.begin() and elenco.end() and the const
>> method (if I erase the keyword const the program is OK, but I don't want
>> remove const because the method is const).
>> Have I cast elenco.begin() and elenco.end()? In which mode?
>> Thanks
>> Alessandro
>>
>> --
>> ************************************************
>> Prof. Alessandro Bugatti
>> Docente di Informatica
>> Istituto Tecnico Industriale Statale B. Castelli
>> E-mail: ale...@is...
>> Sito web: www.imparando.net
>> ************************************************
>>
>>
>> -------------------------------------------------------------------------
>> This SF.net email is sponsored by: Splunk Inc.
>> Still grepping through log files to find problems?  Stop.
>> Now Search log events and configuration files using AJAX and a browser.
>> Download your FREE copy of Splunk now >> http://get.splunk.com/
>> _______________________________________________
>> Dev-cpp-users mailing list
>> Dev...@li...
>> TO UNSUBSCRIBE: http://www23.brinkster.com/noicys/devcpp/ub.htm
>> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
>>
>>     
>
>
>
>   

-- 
************************************************
Prof. Alessandro Bugatti
Docente di Informatica
Istituto Tecnico Industriale Statale B. Castelli
E-mail: ale...@is...
Sito web: www.imparando.net
************************************************

Re: [Dev-C++] Vector and algorithms

[Alessandro B. <ale...@is...>]

Thanks, now it works.
Alessandro.

Wobien Doyer ha scritto:
> Hello Alessandro,
> I had problems like that with iterators in const methods.
> It was solved by using const_iterator instead, so:
>
> vector<string>::const_iterator result =
>        find( elenco.begin(), elenco.end(), a );
>
> The strings in the vector are, inside a const method considered to be 
> const, but a non const iterator points to a non const string.
>
>
> Wobien
>
> ----- Original Message ----- From: "Alessandro Bugatti" 
> <ale...@is...>
> To: <dev...@li...>
> Sent: Monday, November 12, 2007 11:59 PM
> Subject: [Dev-C++] Vector and algorithms
>
>
>> Hello, I wrote this method and I receive an error message in 
>> compilation:
>>
>> bool Dizionario::inDictionary(const string &a) const
>> {
>>    vector<string>::iterator result =
>>        find( elenco.begin(), elenco.end(), a );
>>    if (result == elenco.end()) return false;
>>    return true;
>> }
>>
>> 598 C:\Programmi\Dev-Cpp\include\c++\3.3.1\bits\stl_iterator.h invalid
>> conversion from `const std::string* const' to `std::string*'
>>
>> I wonder the problem is in elenco.begin() and elenco.end() and the const
>> method (if I erase the keyword const the program is OK, but I don't want
>> remove const because the method is const).
>> Have I cast elenco.begin() and elenco.end()? In which mode?
>> Thanks
>> Alessandro
>>
>> -- 
>> ************************************************
>> Prof. Alessandro Bugatti
>> Docente di Informatica
>> Istituto Tecnico Industriale Statale B. Castelli
>> E-mail: ale...@is...
>> Sito web: www.imparando.net
>> ************************************************
>>
>>
>> ------------------------------------------------------------------------- 
>>
>> This SF.net email is sponsored by: Splunk Inc.
>> Still grepping through log files to find problems?  Stop.
>> Now Search log events and configuration files using AJAX and a browser.
>> Download your FREE copy of Splunk now >> http://get.splunk.com/
>> _______________________________________________
>> Dev-cpp-users mailing list
>> Dev...@li...
>> TO UNSUBSCRIBE: http://www23.brinkster.com/noicys/devcpp/ub.htm
>> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users 
>
>
>

-- 
************************************************
Prof. Alessandro Bugatti
Docente di Informatica
Istituto Tecnico Industriale Statale B. Castelli
E-mail: ale...@is...
Sito web: www.imparando.net
************************************************