Pairs.cpp

// used to combine two entity
// declare a data with two pair

/*
default constructor use 0 0 for int
string for empty string
*/

#include <iostream>
#include <bits/stdc++.h>
using namespace std;
int main()
{
    pair<int, char> pair1;

    pair<int, int> pair2(10, 20);

    pair<int, char> p2;

    pair<int, string> p1;

    p1 = {10, "twitter"};

    pair1.first = 100;
    pair1.second = 'G';
    cout << pair1.first << " ";
    cout << pair1.second << " "
         << "\n";

    cout << pair2.first << " " << pair2.second << "\n";
    cout << p2.first << " " << p2.second << "\n";
    cout << p1.first << " " << p1.second << "\n";

    // function for make pair

    pair<int, int> p3;
    p3 = make_pair(100, 200);
    cout << p3.first << " " << p3.second << "\n";

    // comparision operators in pair comparison will be on first element in vector in heap
    pair<int, int> l1(1, 23), l2(1, 42);
    cout << (l1 == l2) << "\n"; // two values need to match
    cout << (l1 != l2) << "\n"; // false is both same if anyone different then true
    cout << (l1 > l2) << "\n";  // compare the first value if first values are same the n compare the second value
    cout << (l1 < l2) << "\n";  // compare the first value
}