#include <iostream>
#include <queue>
using std::cout;
using std::endl;
using std::queue;
void print(queue<int> q)
{
while (!q.empty()) {
cout << q.front() << " ";
q.pop();
}
cout << endl;
}
int main()
{
queue<int> q;
for (auto i : { 1,2,3,4,5,6 }) q.push(i);
print(q);
return 0;
}
/*
run:
1 2 3 4 5 6
*/