Re: problem in stl

From:
"Alf P. Steinbach" <alfps@start.no>
Newsgroups:
comp.lang.c++
Date:
Mon, 15 Feb 2010 11:19:15 +0100
Message-ID:
<hlb6vc$nup$2@news.eternal-september.org>
* Alf P. Steinbach:

* vicky:

On Feb 15, 1:29 am, Andr? Schreiter <andre.schrei...@gmx.de> wrote:

Am 15.02.2010 10:18, schrieb vicky:

i declares a vector and uses its sort function, acc. to a tutorial.

std::vector hasn't a sort function. Use the header <algorithm>:

#include <algorithm>
#include <vector>

...
std::vector<int> c;
...
std::sort(c.begin(), c.end());
...


but i m reading a book of "Nicolai M. Josuttis". it is highly
recommended one.He has used it many a times.
Is it like it was before and now removed.?


I think you may have seen use of

   list<int> someList;
   someList.sort()

but not vector.

It may not appear to be very unified, but the unification is via the
std::sort routine.

The headers for types like vector and sort provide overloads of
std::sort where appropriate. For a type where there's no such override
std::sort uses a general algorithm that requires random access, like
indexing of a vector. But that doesn't work for std::list, so std::list
has a sort() member function (presumably it uses merge sorting or some
such that's better suited for linked lists), and overrides std::sort to
call that member function.

Cheers & hth.,

- Alf


Sorry about the brain-to-keyboard errors. I meant to write headers for types
like vector and list, and at the end there I meant to write overload not override.

But anyway...

Cheers,

- Alf

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