Check out example codes for "priority queue c++ code stl". It will help you in understanding the concepts better.

Code Example 1

// C++ program to demonstrate min heap 
#include <iostream> 
#include <queue> 
  
using namespace std; 
  
void showpq(priority_queue <int, vector<int>, greater<int>> gq) 
{ 
    priority_queue <int, vector<int>, greater<int>> g = gq; 
    while (!g.empty()) 
    { 
        cout << '\t' << g.top(); 
        g.pop(); 
    } 
    cout << '\n'; 
} 
  
int main () 
{ 
   //for max heap // by default use 
  // priority_queue<type>name;
  // for min heap//
    priority_queue <int, vector<int>, greater<int>> gquiz; 
    gquiz.push(10); 
    gquiz.push(30); 
    gquiz.push(20); 
    gquiz.push(5); 
    gquiz.push(1); 
  
    cout << "The priority queue gquiz is : "; 
    showpq(gquiz); 
  
    cout << "\ngquiz.size() : " << gquiz.size(); 
    cout << "\ngquiz.top() : " << gquiz.top(); 
  
  
    cout << "\ngquiz.pop() : "; 
    gquiz.pop(); 
    showpq(gquiz); 
  
    return 0; 
}

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