Methods of a Unique Pointer

              
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#include <iostream>
#include <memory>

struct Sample {
    Sample(int v) 
        : value(v) {}
    
    int value;
    void GetValue() { std::cout << "Value: " << value << std::endl; }
};

int main() 
{
    // Creating a `unique_ptr`
    std::unique_ptr<Sample> p_first = std::make_unique<Sample>(10);

    // Using `get()` to retrieve the raw pointer
    Sample* p_raw = p_first.get();
    std::cout << "Raw pointer value: " << p_raw->value << std::endl;

    // Using `release()` to transfer ownership
    Sample* p_released = p_first.release();
    if (!p_first) 
        std::cout << "p_first is now empty after release.\n";

    // Manually delete the released pointer to avoid memory leak
    delete p_released;

    // Resetting the `unique_ptr`
    p_first.reset(new Sample(20));
    p_first->GetValue();

    // Using `swap()` with another `unique_ptr`
    std::unique_ptr<Sample> p_second = std::make_unique<Sample>(30);
    p_first.swap(p_second);
    p_first->GetValue(); // Now `p_first` owns `p_second` object

    // Dereferencing the pointer
    std::cout << "Dereferencing p_first: " << (*p_first).value << std::endl;

    // Accessing members using `->` operator
    p_first->GetValue();
}