C++ priority_queue emplace()

C++ priority_queue emplace() function is used to add a new element in priority-queue. This new element is added to the top of the priority-queue.

Syntax

Consider priority_queue 'pq' as a priority_queue object.

Parameter

Value: This element is inserted into the priority-queue is passed as the parameter.

Return value

None

Example 1

#include <iostream>
#include <queue>
#include <string>
using namespace std;
int main()
{
  priority_queue<string> mp; 
mp.emplace("India");
mp.emplace("Bharat");
mp.emplace("Hindustan");
cout<< "mypqueue = " ;
while (!mp.empty())
 {
		cout<<mp.top() << " ";
		mp.pop();
}
return 0;
}

Output:

mypqueue = India Hindustan Bharat

Example 2

#include <iostream>
#include <queue>
using namespace std;
int main()
{
  priority_queue<int> mp;
mp.emplace(1);
mp.emplace(2);
mp.emplace(3);
cout<< "mypqueue = " ;
while (!mp.empty()) 
{
cout<<mp.top() << " ";
mp.pop();
}
return 0;
}

Output:

mypqueue = 3 2 1

Example 3

#include <iostream>
#include <queue>
using namespace std;
int main()
{
  priority_queue<char> mp;
  mp.emplace('a');
mp.emplace('b');
mp.emplace('c');
cout<< "mypqueue = " ;
while (!mp.empty()) 
{
	cout<<mp.top() << " ";
	mp.pop();
}
	return 0;
}

Output:

mypqueue = c b a

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