#include <iostream>
#include <iomanip>
#include <memory>
#include <string>

using namespace std;

class FooT{
   public:
       FooT(int n): number{n}{ cout << n << endl; }
       int Value() const{
           return number;
       }
   private:
       int number;
};

const int SIZE = 10;
int main() {

    unique_ptr<FooT> foo;
    unique_ptr<FooT> boo;


    if (foo == nullptr) {
        cout << "foo is null" << endl;
    }

    foo = make_unique<FooT>(3);
    cout << " The number is " << foo->Value() << endl;
    cout << "Foo points at " << foo.get() << endl;
    boo = move(foo);

    if (foo == nullptr) {
        cout << "foo is null" << endl;
    }
    cout << "After the move" << endl;
    cout << "Foo points at " << foo.get() << endl;
    cout << "Boo points at " << boo.get() << endl;
    cout << " The number is " << boo->Value() << endl;

    cout << endl << endl << endl;

    // an example of just a pointer.
    unique_ptr<string> word;
    word = make_unique<string>("Hello World");
    word = make_unique<string>();
    *word = "Hello To You";

    cout << "the word is " << *word << endl;
    cout << "The size of the word is " << word->size() << endl;
    cout << endl;

    // an array example
    unique_ptr<int[]> ints = make_unique<int[]>(SIZE);
  
    int i = 0;
    for(auto x : {1,2,3,4,5,6,7,8,9,10}) {
        ints[i++] = x; 
    }

    for(i=SIZE-1; i > 0; i--) {
       cout <<i << setw(4) << ints[i] << endl;
    }

    unique_ptr<string> otherWord;

    cout << "Before the move " << endl;
    cout << " The address of word "  << word.get() << endl;
    cout << " The address of otherword " << otherWord.get() << endl;
    //otherWord = word;
    otherWord = move(word);
    cout << "After the move " << endl;
    cout << " The address of word " << word.get() << endl;
    cout << " The address of otherword " << otherWord.get() << endl;
    
    return 0;
}