Smart pointers (unique_ptr) [C++]

smartPointers.cpp

#include <iostream>
#include <memory>
#include <algorithm>

using namespace std;

struct Human {
	int age = 0;
	Human(const int& newAge) { age = newAge; }
};

int main() {
	
	constexpr size_t tam = 2;
	unique_ptr<int[]> u1(new int[tam]);
	unique_ptr<int[]> u2;
	
	u1[0] = 10;
	u1[1] = 20;

	cout << u1[0] << ' ' << u1[1] << endl;
	
	u2 = move(u1);
	
	constexpr size_t tam2 = 4;
	
	u1 = make_unique<int[]>(tam2); // or: unique_ptr<int[]>(new int[tam2]);
	
	for (size_t idx = 0; idx < tam; ++idx) {
		u1[idx] = u2[idx];
	}
	
	u1[2] = 30;
	u1[3] = 40;
	
	for (size_t idx = 0; idx < tam2; ++idx) {
		cout << u1[idx] << ' ';
	}
	cout << endl;
	
	// Sort
	
	int * vect = new int[2] {5,1};
	sort(vect, vect + 2);
	cout << vect[0] << endl;
	delete[] vect;
	
	unique_ptr<int[]> vect2(new int[2] {5,1});
	sort(vect2.get(), vect2.get() + 2);
	cout << vect2[0] << endl;
	
	// Human
	cout << make_unique<Human>(90)->age << endl; // JAVA -> System.out.println(new Human(90).age);
	
	return 0;
}