Using non-placement new expression

Using a non-placement new expression means creating an object dynamically using the "new" operator without specifying a specific memory location for the object. The new operator will automatically allocate memory for the object and return a pointer to the newly created object.

Here's an example of using a non-placement new expression:

#include <iostream>

class MyClass {
public:
  MyClass() {
    std::cout << "MyClass constructor called!" << std::endl;
  }

  ~MyClass() {
    std::cout << "MyClass destructor called!" << std::endl;
  }
};

int main() {
  MyClass* obj = new MyClass(); // Non-placement new expression

  // Use the object...

  delete obj; // Deallocate memory and call the destructor

  return 0;
}

In this example, the non-placement new expression `new MyClass()` is used to dynamically create an object of the class `MyClass`. The `new` operator allocates memory for the object and calls the constructor of `MyClass`. Later, `delete` is used to deallocate the memory and call the destructor of `MyClass`.