#include <iostream>
#include <deque>
using namespace std;
void show(const char *msg, deque<int> q);
int main() {
deque<int> dq(10);
for(unsigned i=0; i < dq.size(); ++i) dq[i] = i*i;
show("Contents of dq: ", dq);
// clear dq by popping elements one at a time.
cout << "Front popping elements from dq.\n";
while(dq.size() > 0) {
cout << "Popping: " << dq.front() << endl;
dq.pop_front();
}
if(dq.empty()) cout << "dq is now empty.\n";
return 0;
}
// Display the contents of a deque<int>.
void show(const char *msg, deque<int> q) {
cout << msg;
for(unsigned i=0; i < q.size(); ++i)
cout << q[i] << " ";
cout << "\n";
}
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