Added sample solution for testing C++ 11

Author: NikolayIT

Documentation/Installation/sample-solution-cpp11.cpp

@@ -0,0 +1,86 @@
+#include<iostream>
+#include<random>
+#include<unordered_map>
+#include<vector>
+#include<algorithm>
+
+void nptr(int x)
+{
+	std::cout<<"This function shouldn't be called\n";
+}
+void nptr(char*x)
+{
+	std::cout<<"This function should be called\n";
+	if(x) std::cout<<"... but something is wrong!\n";
+}
+
+constexpr long long fib(int x)
+{
+	return x<2?1:fib(x-1)+fib(x-2);
+}
+
+int main()
+{
+	std::cout<<"If the program freezes now it's bad\n";
+	const long long bigfib=fib(80);
+	std::cout<<"It didn't froze\n";
+	std::cout<<bigfib<<'\n';
+
+	std::mt19937 gen{std::random_device{}()};
+
+	std::vector<int> v;
+	std::cout<<"Initialised\n";
+
+	v.resize((1<<18)/sizeof(int));
+	std::cout<<"Allocated\n";
+
+	for(auto &x:v) x=gen();
+	std::cout<<"Filled\n";
+
+	decltype(v) v2=v;
+	std::cout<<"Copied\n";
+	if(v.size()==v2.size()) std::cout<<"It's okay\n";
+	else std::cout<<"It's not okay\n";
+	v.clear();
+
+	v=std::move(v2);
+	std::cout<<"Moved\n";
+	if(v2.size()==0) std::cout<<"It's okay\n";
+	else std::cout<<"It's not okay\n";
+
+	v.resize(1<<12);
+	v.shrink_to_fit();
+	v2.shrink_to_fit();
+
+	std::sort(std::begin(v), std::end(v), [](int a, int b){
+		return abs(a)>abs(b);
+	});
+	std::cout<<"Sorted\n";
+
+	std::shuffle(std::begin(v), std::end(v), gen);
+	std::cout<<"Shuffled\n";
+
+	std::unordered_map<int, char> um = {{1, 'a'}, {6, 'b'}, {2, 'x'}};
+	std::uniform_int_distribution<char> letters('a', 'z');
+	for(auto x:v)
+		um.insert({x, letters(gen)});
+
+	nptr(nullptr);
+
+	std::vector<std::vector<char>> vvc={
+		{'a', 'b', 'c'},
+		{'d', 'e', 'f'},
+		{'g', 'h', 'i'}
+	};
+
+	std::tuple<int, char, std::vector<int>> tup;
+	int x;
+	v.resize(42);
+	std::get<0>(tup) = 42;
+	std::tie(x, std::ignore, v) = tup;
+	if(x == 42)
+		std::cout<<"Perfect!\n";
+	else std::cout<<"Oh, noo! Something is wrong :(\n";
+
+	auto tup2 = std::tuple_cat(tup, std::make_tuple((double)3.5), tup, std::tie(x, x));
+}