#include <utility>	// header containing pair and various other STL primitives

#include <iostream>

#include <string>

using namespace std;



typedef pair<int, string> isp;	// typedef is useful in creating abbreviations for template instantiations



void main()

{

	isp	p(0,"Demonstrating use of the pair<T1, T2> template");	



	cout << "The integer: " << p.first << endl		// print first element of p, i.e. the int value

		  << "The string:" << p.second << endl;		// print second element of p, i.e. the string value



	isp::first_type i_val;		// declare new variable with same type as first element of i_s_pair

	isp::second_type s_val;		// declare new variable with same type as second element of i_s_pair

	

	cout << "Input new int and string for first pair:" << endl;

	cin >> i_val >> s_val;

	p = make_pair(i_val,s_val);	// create new pair using helper function make_pair(first,second)

	cout << "Input new int and string for second pair:" << endl;

	cin >> i_val >> s_val;

	isp	p2(i_val, s_val);	



	if (p < p2)	// true if (p.first < p2.first) OR (p.first == p2.first AND p.second < p2.second), false otherwise

	{	cout << "p is less than p2" << endl;	}

	else

	{	cout << "p2 is less than p" << endl;	}

}