#include <iostream>
#include <iomanip>    //for the i/o manipulator setw
#include <cstdlib>
#include <algorithm>  //for the algorithm sort
using namespace std;

//Create a new data type, named "month".
struct month {
	string name;
	int length;
};

int main()
{
	month a[] {
		{"January",   31},
		{"February",  28},  //non-leap
		{"March",     31},
		{"April",     30},
		{"May",       31},
		{"June",      30},
		{"July",      31},
		{"August",    31},
		{"September", 30},
		{"October",   31},
		{"November",  30},
		{"December",  31}
	};

	//Sort the array of structures into increasing numerical order.

	sort(begin(a), end(a),
		[](const month& a, const month& b) {return a.length < b.length;});

	//make sure they were sorted correctly.

	for (const auto& value: a) {
		cout << left  << setw(9) << value.name   << " "
		     << right << setw(2) << value.length << "\n";
	}

	return EXIT_SUCCESS;
}