Re: initializing a vector with a sequence of 0, ..., N-1

From:

"kanze" <kanze@gabi-soft.fr>

Newsgroups:

comp.lang.c++.moderated

Date:

25 Apr 2006 18:22:41 -0400

Message-ID:

<1145956479.573417.221090@y43g2000cwc.googlegroups.com>

Carlos Moreno wrote:

Irek Szczesniak wrote:

I want to initialize a vector of N elements with the integer
numbers from 0 to N-1. What I came up with is this:

#include <vector>
#include <algorithm>
#include <iterator>
#include <iostream>

using namespace std;

int main()
{
vector<int> index(10);
for(int i = index.size(); i--; index[i] = i);

Why wouldn't you code something so simple with a more
straightforward code? (i.e., less twisted and tricky)

However, I don't like this, because I can introduce a but
when coding the "for" loop. Do you know some better way of
doing it?

For instance, it would be cool to have something like this:

vector<int> index(seq<vector<int> >(0, 9));

How about introducing a counting iterator?

You mean like
http://www.boost.org/libs/iterator/doc/counting_iterator.html.

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