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P_QUEUE.CPP
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1997-02-28
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#include <queue>
#include <deque>
#include <vector>
#include <string>
using namespace std;
int main ()
{
//
// Make a priority queue of int using a deque container.
//
priority_queue<int, vector<int>, less<int> > pq;
//
// Push a couple of values.
//
pq.push(1);
pq.push(2);
//
// Pop a couple of values and examine the ends.
//
cout << pq.top() << endl;
pq.pop();
cout << pq.top() << endl;
pq.pop();
//
// Make a priority queue of strings.
//
priority_queue<string,deque<string>, less<string> > pqs;
//
// Push on a few strings then pop them back off.
//
int i;
for (i = 0; i < 10; i++)
{
pqs.push(string(i+1,'a'));
cout << pqs.top() << endl;
}
for (i = 0; i < 10; i++)
{
cout << pqs.top() << endl;
pqs.pop();
}
//
// Make a priority queue of strings using greater.
//
priority_queue<string,deque<string>, greater<string> > pgqs;
//
// Push on a few strings then pop them back off.
//
for (i = 0; i < 10; i++)
{
pgqs.push(string(i+1,'a'));
cout << pgqs.top() << endl;
}
for (i = 0; i < 10; i++)
{
cout << pgqs.top() << endl;
pgqs.pop();
}
return 0;
}