cycling through a vector?

[JoeC]

I have a vector of elements, how can I take the first element of a
vector and put it in the end and have all the other elements cycle
down? Ex:
1, 2, 3, 4...
cycle
4, 1, 2 ,3

I still want to use the vector vec[x] or is there a liberary that is
better for this?

 

[aep]

I have a vector of elements, how can I take the first element of a
vector and put it in the end and have all the other elements cycle
down? Ex:
1, 2, 3, 4...
cycle
4, 1, 2 ,3

I still want to use the vector vec[x] or is there a liberary that is
better for this?

You'll be better off using a deque.

#include <iostream>
#include <deque>
#include <iterator>
#include <algorithm>

int main(int argc, char* argv[])
{
std::deque<int> d;
d.push_back(1);
d.push_back(2);
d.push_back(3);
d.push_back(4);

std::copy(d.begin(), d.end(),
std:stream_iterator<int>(std::cout, "\n"));

d.push_back(d.front());
d.pop_front();
std::copy(d.begin(), d.end(),
std:stream_iterator<int>(std::cout, "\n"));
}