Modern C++ - Memory

memory.cpp

#include <iostream>
#include <memory>

void classic_cpp()
{
    std::cout << "***Classic C++***" << std::endl;
    /*Classic C++*/
    int *x = new int(10);
    std::cout << "value of x: " << *x << " ---- address of x: " << x << std::endl;
    *x = 100;
    std::cout << "value of x: " << *x << " ---- address of x: " << x << std::endl;
    delete x;
    x = NULL;
    x = new int[10]; //reusage of same variable name
    x[0] = 2;
    x[9] = 11;
    std::cout << "value of x[0]: " << x[0] << " ---- address of x[9]: " << x[9] << std::endl;
    delete[] x;  //without deleting the x, i have a memory leak
    x = NULL;
}

void modern_cpp()
{
    std::cout << "***Modern C++***" << std::endl;
    /*Modern C++*/
    std::unique_ptr<int> x(new int(10));
    std::cout << "value of x: " << *x << " ---- address of x: " << x.get() << std::endl;
    *x = 100;
    std::cout << "value of x: " << *x << " ---- address of x: " << x.get() << std::endl;
    x.reset(new int[10]);   //reusage of same variable name
    x.get()[0] = 2;
    x.get()[9] = 11;
    std::cout << "value of x[0]: " << x.get()[0] << " ---- address of x[9]: " << x.get()[9] << std::endl;
}

int main()
{
    classic_cpp();
    modern_cpp();
    return 0;
}