Displaying contents of STL std::set unsorted

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Hi all,

a STL std::set does not store the elements in the same sequence as it is input, rather it stores the elements sorted. Can anyone suggest any idea of displaying the contents of the set unsorted (in the input sequence).

Thank you.

Posted 15-Jun-10 0:18am

Prasad A

Updated 16-Jun-10 0:52am

Moak

v4

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Moak 15-Jun-10 7:02am

Updated subject and tags, hope this is what you are looking for. Perhaps use an unsorted STL container instead.

3 solutions

Solution 2

Take a look at Boost.MultiIndex[^] library.

Posted 15-Jun-10 6:21am

Nemanja Trifunovic

Solution 3

If you want to store a bunch of elements unsorted may I humbly recommend using either std::vector (if you know roughly how many elements you're going to add) or std::list? Both of them provide a push_back function that'll preserve the insertion order for you.

[Oh, and you'll have to find some other way of checking for uniqueness as well if that was why you were using std::set in the first place.]

Cheers,

Ash

Posted 15-Jun-10 9:09am

Aescleal

Updated 15-Jun-10 9:11am

v2

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CPallini · Accepted Answer · 2010-06-15T01:49:00

Solution 1

You need an auxiliary container (with all the caveats of the case).
:)

Posted 15-Jun-10 1:49am

CPallini

Comments

Prasad A 15-Jun-10 8:11am

Since std::set is an associative container, does it mean that it is not possible to print the the contents unsorterd(in input sequence) ??

CPallini 15-Jun-10 8:47am

The input sequence (unless already sorted) is lost on insertion.