Re: [Dev-C++] (code correction) Help with vectors

[Maya <Esc...@ne...>]

Yes, that was my solution too, but now I a faced with another problem. 
When calling the function member
'const jme::Account& jme::Index::getData()  const; ' I don't have the 
means of knowing the number of elements in the vector, but I am sure 
that HP must have anticipated this problem and add a method that will 
return the number of elements in the array.

Mike, thank you so very much for your help!!

mu...@cb... wrote:

>Oops.
>
>You need to declare "it" as being of type iterator. So in the for
>definition, you want:
>
>for (iterator it = myvec.begin(); it != myvec.end(); ++it)
>
>The iterator as assigned above is a pointer to the first element of the
>vector.
>
>Mike
>
>On Wed, 7 Jan 2004, Michael C Urban wrote:
>
>  
>
>>You get the data from a vector the same way you get the data from an
>>array. So you can either use the subscript operator:
>>
>>myvec[0] // 1st vector element
>>myvec[1] // 2nd vector element, etc.
>>
>>Or you can use pointer arithmetic to iterate through the elements:
>>
>>for (it = myvec.begin(); it != myvec.end(); ++it)
>>{
>>    cout << *it << endl;
>>}
>>
>>Does that answer your question?
>>
>>Mike
>>
>>On Wed, 7 Jan 2004, Maya wrote:
>>
>>    
>>
>>>Ok I have managed to store data in a std::vector<...> object, but how
>>>can I get the data from it?
>>>
>>>Thanks folks!!
>>>
>>>
>>>jme::error_t jme::Index::bagIt(){
>>>   // temporary stream
>>>   jme::gnu_io tmp_stream;
>>>
>>>   // temporary account object
>>>   jme::Account tmp_acc;
>>>
>>>   // set file name
>>>   tmp_stream.setFileName(fname);
>>>
>>>   // if the file stream does not exist return return error value
>>>   if(tmp_stream.notExist()){ return jme::fe_no_not_exist;   }
>>>
>>>   //set file mode
>>>   tmp_stream.setMode(tmp_stream.read_bin);
>>>
>>>   // open file for reading
>>>   tmp_stream.Read();
>>>
>>>   // if the file is empty let the class know and return error value
>>>   if(tmp_stream.is_empty()){
>>>      bag_empty = false;
>>>      return jme::fe_empty;
>>>   }
>>>
>>>   // get the stream size
>>>   std::streampos fsz = tmp_stream.getFileSize();
>>>   do{
>>>      // Read a record into the jme::Account object
>>>      tmp_stream >> tmp_acc;
>>>      // add record to the container
>>>      bag.push_back(tmp_acc);
>>>    // do this while the maximum number of bits in the file are not
>>>    // reached
>>>   }while(fsz != tmp_stream.getNextRead());
>>>
>>>  // sort the container
>>>   std::make_heap(bag.begin(), bag.end());
>>>   std::sort_heap(bag.begin(), bag.end());
>>>
>>>   // Return jme::error_t::good
>>>   return jme::good;
>>>}
>>>
>>>--
>>>
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>
>
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-- 

FYI
http://www.astro.umd.edu/~marshall/abbrev.html

E-Mail Policy
http://www.vif.com/users/escalante/Email_Policy.html

* You cannot exercise your power to a point of humiliation.
                               - Jean Chretien

* The media's the most powerful entity on earth. They have the 
  power to make the innocent guilty and to make the guilty 
  innocent, and that's power. 
                                - Malcom X
* "Innocent until proven guilty", no... not in Canada!!