#include <iostream>

using namespace std;

int main() {

//var createGreeting = function(greeting) { // JavaScript version https://aspiringcraftsman.com/2012/02/17/javascript-closures-explained/

//return function(name) {

//document.write(greeting + ', ' + name + '.');

//};

//};

//helloGreeting = createGreeting("Hello");

//howdyGreeting = createGreeting("Howdy");

//helloGreeting("John"); // Hello, John.{

//howdyGreeting("Jane"); // Hello, John.{

//auto greeting_lambda = [] (std::string greeting) {

//auto greeting_lambda = [&] (std::string greeting) { // makes no difference

//auto greeting_lambda = [=] (std::string greeting) { // makes no difference

auto greeting_lambda = [] (std::string & greeting) { // ?

//auto greeting_lambda = [&] (std::string & greeting) { // ?

//auto greeting_lambda = [=] (std::string & greeting) { // ?

//static string my_greeting {greeting};

//auto name_lambda = [&] (std::string name) { cout << my_greeting << ", " << name << endl; }; // why always prints "hello"?

string my_greeting {greeting};

auto name_lambda = [&] (std::string name) { cout << my_greeting << ", " << name << endl; }; // why crashes?

//string my_greeting {greeting};

//auto name_lambda = [=] (std::string name) { cout << my_greeting << ", " << name << endl; };

//auto name_lambda = [&] (std::string name) { cout << my_greeting << ", " << name << endl; };

return name_lambda;

};

// string yo_string {"Yo"};

static string yo_string {"Yo"};

//auto hello_greeting = greeting_lambda("Hello");

//auto howdy_greeting = greeting_lambda("Howdy");

auto yo_greeting = greeting_lambda(yo_string);

//hello_greeting("John");

//hello_greeting("Sally");

//howdy_greeting("John");

//howdy_greeting("Sally");

yo_greeting( "John");

yo_greeting( "Sally");

cout << "###" << endl;

return 0;

}