After defining a class and creating instances (or objects) of the class, the next step is using these objects.

Objects are used mainly to interact with the methods and properties defined within the class. The syntax to access methods of an object in C++ is: objectName.methodName(parameters);

Let's take up an example where we have created two objects of a hypothetical BankAccount class - account1 for James and account2 for Sophia. Suppose we want to use these objects to interact with the withdraw() and getBalance() methods of our BankAccount class.

1// Considering an object 'account1' of 'BankAccount' class
2account1.withdraw(1000);
3std::cout << "James's balance after withdrawal: " << account1.getBalance() << std::endl;
4
5// linking two objects
6account1.transfer(account2, 1000);
7std::cout << "Sophia's balance after transfer from James: " << account2.getBalance() << std::endl;

In this example, James withdraws an amount of 1000 from his account through the withdraw() method accessed via his account object account1. Then, we display his balance after withdrawal using the getBalance() method. Similarly, we demonstrate a transfer() method that transfers an amount from James' account to Sophia's account. After this transfer, we display Sophia's updated balance. Objects enable us to carry out such complex operations in a very intuitive and flexible manner.

In conclusion, objects are the cornerstone of OOP, they allow us to encapsulate related data and functions within a single class and perform various actions using this encapsulation. A senior engineer would likely appreciate the modularity and structure provided by objects in a system, which can greatly enhance the robustness, maintainability, and code-readability of programming projects.

xxxxxxxxxx

#include <iostream>

using namespace std;

​

int main() {

  // Considering an object 'account1' of 'BankAccount' class

  account1.withdraw(1000);

  std::cout << "James's balance after withdrawal: " << account1.getBalance() << std::endl;

​

  // linking two objects

  account1.transfer(account2, 1000);

  std::cout << "Sophia's balance after transfer from James: " << account2.getBalance() << std::endl;

​

  return 0;

}