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

[Michael C U. <mu...@cb...>]

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;
> > }
> >
> > --
> >
> > FYI
> > http://www.astro.umd.edu/~marshall/abbrev.html
> >
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