CBSE Class 12 Computer Science C++: Chapter 3 - Implementation of OOP Concepts in C++ NCERT Solutions

To execute Function 2 (Book) and Function 3 (print) for the object T, we need to call these member functions using the object T. The constructor `Traveller()` is automatically called when object T is declared. The destructor `~Traveller()` is called when the program execution reaches the closing brace `}` of the `main` function.

1. Line 1: To execute Function 2 (Book), we call it on object T, passing the required arguments for PNR and TName.

   T.Book(1234567, "Ravi");

2. Line 2: To execute Function 3 (print), we call it on object T.

   T.print();

(ii) Which function will be executed at `}//Stops here`? What is this function referred as?

The function that will be executed when the program execution reaches the closing brace `}` of the `main` function is Function 4, which is the destructor of the `Traveller` class.

This function is referred to as a destructor. It is automatically called when an object of the class goes out of scope or is explicitly deleted, performing cleanup tasks.

Here is the C++ class definition for `PIC` as per the given description:

#include <iostream>
#include <cstring>

class PIC {
  int Pno;
  char Category[20];
  char Location[20];
  void FixLocation( );

public:
  void Enter( );
  void SeeAll( );
};

void PIC::FixLocation( )
{
  // Using strcmpi for case-insensitive comparison
  if (strcmpi(Category, "Classic") == 0)
    strcpy(Location, "Amina");
  else if (strcmpi(Category, "Modern") == 0)
    strcpy(Location, "Jim Plaq");
  else if (strcmpi(Category, "Antique") == 0)
    strcpy(Location, "Ustad Khan");
  else
    strcpy(Location, "Unknown"); // Default case if category doesn't match
}

void PIC::Enter( )
{
  std::cout << "Enter Picture Number: ";
  std::cin >> Pno;
  std::cout << "Enter Category (Classic/Modern/Antique): ";
  std::cin >> Category;
  
  // Call FixLocation to set the location based on category
  FixLocation( );
}

void PIC::SeeAll( )
{
  std::cout << "Picture Number: " << Pno << std::endl;
  std::cout << "Category: " << Category << std::endl;
  std::cout << "Location: " << Location << std::endl;
}

    
Explanation:
    

      
The `PIC` class has private data members `Pno`, `Category`, and `Location` to store picture details.
      
The `FixLocation` private member function is responsible for setting the `Location` based on the `Category`. It uses `strcmpi` for case-insensitive string comparison to match the category and `strcpy` to assign the location.
      
The public member function `Enter()` prompts the user to input the picture number and category, and then calls `FixLocation()` to determine the exhibition location.
      
The public member function `SeeAll()` displays all the data members (`Pno`, `Category`, `Location`) of the object.