#include <iostream>
#include <cstdlib>
#include <string>
#include <chrono>     //for chrono::system_clock
#include <random>     //for default_random_engine
#include <functional> //for bind
using namespace std;

int main()
{
	struct duty {
		string platform;
		string duty_station;
	};

	const duty a[] {
		{"CVN",  "Virginia"},   //Aircraft Carrier (Nuclear)
		{"LHD",  "California"}, //Landing Helicopter Dock
		{"LPD",  "Japan"},      //Landing Platform Dock
		{"LSD",  "Florida"},    //Landing Ship, Dock
		{"DDG",  "Italy"},      //Guided-Missle Destroyer
		{"CG",   "Spain"},      //Cruiser
		{"SSN",  "Bahrain"},    //Nuclear Submarine
		{"SSBN", "Greece"},     //nuclear-powered ballistic missile sub
		{"SSGN", "Hawaii"}      //subsurface guided missle nuc pow sub
	};

	const int n {size(a)};          //the number of structures in the array

	const unsigned seed =
		chrono::system_clock::now().time_since_epoch().count();
	const default_random_engine engine {seed};
	const uniform_int_distribution<int> distribution;
	auto r {bind(distribution, engine)};
    
	const int orders {r() % n};      //Random orders from 0 to n-1 inclusive

	cout << "I was stationed on a " << a[orders].platform
		 << " in " << a[orders].duty_station << ".\n";

	return EXIT_SUCCESS;
}