Different versions of new operator

new.cpp

#include <iostream>

struct Object
{
    Object(int n = 0) : n(n)
    { std::cout << '[' << n << ']' << " Object::Object()" << std::endl; }

    ~Object()
    { std::cout << '[' << n << ']' << " Object::~Object()" << std::endl; }

    int n;
};

char * buffer[100];

int main()
{
    {
        Object obj1(11);
    }

    Object * obj2 = new Object(22);
    delete obj2;

    Object * obj3 = new(buffer) Object(33);
    obj3->~Object();

    try
    {
        Object * obj4 = new Object[1000000000000];
        delete[] obj4;
    }
    catch(std::bad_alloc e)
    {
        std::cout << "exception: cannot allocate 1000000000000 objects" << std::endl;
    }

    Object * obj5 = new(std::nothrow) Object[1000000000000];

    if (obj5)
    {
        delete[] obj5;
    }
    else
    {
        std::cout << "null pointer: cannot allocate 1000000000000 objects" << std::endl;
    }
}