Here my code (I'm a C++ novice):

#include <iostream>
#include <deque>

int main(void)
{
    // games per team: n - 1
    std::deque<int> tournament;
    int c;
    int first = 0;
    // simple example with integers
    for (int i = 1; i < 8; i++)
    {
        tournament.push_back(i);
    }
    bool even = !(tournament.size() & 1);
    if (even)
    {
        first = tournament.front();
        tournament.pop_front();
    }
    for (int j = 0; j < tournament.size() - 1; j++)
    {
        std::cout << "Round " << j + 1 << ":" << std::endl;
        if (even)
        {
            std::cout << first << " vs " << tournament.back() <<
std::endl;
        }
        for (int i = 0; i < tournament.size()/2; i++)
        {
            std::cout << tournament[i] << " vs " << tournament
[tournament.size() - i - 2] << std::endl;
        }
        tournament.push_front(tournament.back());
        tournament.pop_back();
    }
    c = getchar();
    return 0;