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int* ptr = new int;     // Allocate memory for an integer using "new"
*ptr = 42;              // Assign a value to the memory location pointed by "ptr"
cout << *ptr << endl;   // Print the value pointed by "ptr"

delete ptr;             // Deallocate the memory using "delete"
ptr = nullptr;         // // Set the pointer to nullptr after deletion

#include <iostream>
using namespace std;

class MyClass {
public:
    void printMessage() {
        cout << "Hello, world!" << endl;
    }
};

int main() {
    // Allocate memory for a MyClass object using "new"
    MyClass* ptr = new MyClass;
    
    // Call the "printMessage" function using "->"
    ptr->printMessage();
    
    // Deallocate the memory using "delete"
    delete ptr;
    
    // Set the pointer to nullptr after deletion
    ptr = nullptr;

    return 0;
}

#include <iostream>
#include <string>
using namespace std; 

class Person {
public:
    string name;
    int age;

    Person(const string& pString, int pint) : name(pString), age(pInt) {}

    void display() {
        cout << "Name: " << name << ", Age: " << age << endl;
    }
};

int main() {
    // Using 'new' to dynamically allocate memory for a Person object
    Person *personPtr = new Person("John Doe", 30);

    // Using '->' to access members of the object pointed to by the pointer
    personPtr->display();

    // Using 'delete' to deallocate the memory that was previously allocated with 'new'
    delete personPtr;
    personPtr = nullptr; 

    return 0;
}