Question textFor this programming question, you will be working with Polymorphism. Given the base abstract class "airplane", the derived classes "passenger" and "cargo", and the container class "airport" (defined in airport.h): #ifndef AIRPORT_H#define AIRPORT_H #include "airplane.h"#include "passenger.h"#include "cargo.h" #include #include using namespace std; class airport{private: string city; string code; vector airplanes; public: airport(const string &_city, const string &_code); airport(const airport &RHS); airport &operator=(const airport &RHS); ~airport(); void add_airplane(const airplane &plane); void summary() const; void list_airplanes() const;}; #endif Modify the base class airplane and the derived classes passenger and cargo (following the comments in the provided template files), and write the implementation of the member functions summary and list_airplanes. Here is the implementation of the other member functions of the "airport" class: airport::airport(const string &_city, const string &_code){ city = _city; code = _code;} airport::airport(const airport &RHS){ city = RHS.city; code = RHS.code; for (airplane *plane : RHS.airplanes) { if (plane != nullptr) { airplane *temp_plane; if (plane-get_type() == 'P') { temp_plane = new passenger(*((passenger *)plane)); } else { temp_plane = new cargo(*((cargo *)plane)); } airplanes.push_back(temp_plane); } }} airport &airport::operator=(const airport &RHS){ if (this != &RHS) { city = RHS.city; code = RHS.code; if (airplanes.size() 0) // Delete allocated memory { for (int i = airplanes.size() - 1; i = 0; i--) { if (airplanes.at(i) != nullptr) { delete airplanes.at(i); airplanes.pop_back(); } } } for (airplane *plane : RHS.airplanes) { if (plane != nullptr) { airplane *temp_plane; if (plane-get_type() == 'P') { temp_plane = new passenger(*((passenger *)plane)); } else { temp_plane = new cargo(*((cargo *)plane)); } airplanes.push_back(temp_plane); } } } return *this;} airport::~airport(){ if (airplanes.size() 0) // Delete allocated memory { for (int i = airplanes.size() - 1; i = 0; i--) { if (airplanes.at(i) != nullptr) { delete airplanes.at(i); airplanes.pop_back(); } } }} void airport::add_airplane(const airplane &plane){ airplane *temp_plane; if (plane.get_type() == 'P') { temp_plane = new passenger((const passenger &)plane); } else { temp_plane = new cargo((const cargo &)plane); } airplanes.push_back(temp_plane);} HINT: You can use the code from these functions when writing the solution for the requested member functions. NOTES: You can safely assume that the input is always correct. You must use function identifiers based on the specifications of the question when writing your solution. You do not need to write a main function. Solutions that do not compile will receive a 100 % penalty. Hardcoding the output will translate into a 100 % penalty. Answer:(penalty regime: 0 %)// airplane.h #ifndef AIRPLANE_H #define AIRPLANE_H #include #include using namespace std; class airplane { private: string manufacturer; string model; string tail_number; public: airplane(const string& _manufacturer, const string& _model, const string& _tail_number) : manufacturer(_manufacturer), model(_model), tail_number(_tail_number) {} virtual char get_type() const = 0; virtual void print() const { cout

Question

Question textFor this programming question, you will be working with Polymorphism. Given the base abstract class "airplane", the derived classes "passenger" and "cargo", and the container class "airport" (defined in airport.h): #ifndef AIRPORT_H#define AIRPORT_H #include "airplane.h"#include "passenger.h"#include "cargo.h" #include #include using namespace std; class airport{private: string city; string code; vector airplanes; public: airport(const string &_city, const string &_code); airport(const airport &RHS); airport &operator=(const airport &RHS); ~airport(); void add_airplane(const airplane &plane); void summary() const; void list_airplanes() const;}; #endif Modify the base class airplane and the derived classes passenger and cargo (following the comments in the provided template files), and write the implementation of the member functions summary and list_airplanes. Here is the implementation of the other member functions of the "airport" class: airport::airport(const string &_city, const string &_code){ city = _city; code = _code;} airport::airport(const airport &RHS){ city = RHS.city; code = RHS.code; for (airplane *plane : RHS.airplanes) { if (plane != nullptr) { airplane *temp_plane; if (plane->get_type() == 'P') { temp_plane = new passenger(*((passenger *)plane)); } else { temp_plane = new cargo(*((cargo *)plane)); } airplanes.push_back(temp_plane); } }} airport &airport::operator=(const airport &RHS){ if (this != &RHS) { city = RHS.city; code = RHS.code; if (airplanes.size() > 0) // Delete allocated memory { for (int i = airplanes.size() - 1; i >= 0; i--) { if (airplanes.at(i) != nullptr) { delete airplanes.at(i); airplanes.pop_back(); } } } for (airplane *plane : RHS.airplanes) { if (plane != nullptr) { airplane *temp_plane; if (plane->get_type() == 'P') { temp_plane = new passenger(*((passenger *)plane)); } else { temp_plane = new cargo(*((cargo *)plane)); } airplanes.push_back(temp_plane); } } } return *this;} airport::~airport(){ if (airplanes.size() > 0) // Delete allocated memory { for (int i = airplanes.size() - 1; i >= 0; i--) { if (airplanes.at(i) != nullptr) { delete airplanes.at(i); airplanes.pop_back(); } } }} void airport::add_airplane(const airplane &plane){ airplane *temp_plane; if (plane.get_type() == 'P') { temp_plane = new passenger((const passenger &)plane); } else { temp_plane = new cargo((const cargo &)plane); } airplanes.push_back(temp_plane);} HINT: You can use the code from these functions when writing the solution for the requested member functions. NOTES: You can safely assume that the input is always correct. You must use function identifiers based on the specifications of the question when writing your solution. You do not need to write a main function. Solutions that do not compile will receive a 100 % penalty. Hardcoding the output will translate into a 100 % penalty. Answer:(penalty regime: 0 %)// airplane.h #ifndef AIRPLANE_H #define AIRPLANE_H #include #include using namespace std; class airplane { private: string manufacturer; string model; string tail_number; public: airplane(const string& _manufacturer, const string& _model, const string& _tail_number) : manufacturer(_manufacturer), model(_model), tail_number(_tail_number) {} virtual char get_type() const = 0; virtual void print() const { cout << "Manufacturer: " << manufacturer << ", Model: " << model << ", Tail number: " << tail_number; } virtual ~airplane() {} }; #endif // passenger.h #ifndef PASSENGER_H #define PASSENGER_H #include "airplane.h" #include #include using namespace std; class passenger : public airplane { private: string airline; int n_passengers; public: passenger(const string& _manufacturer, const string& _model, const string& _tail_number, const string& _airline, int _n_passengers) : airplane(_manufacturer, _model, _tail_number), airline(_airline), n_passengers(_n_passengers) {} ~passenger() {} char get_type() const override { return 'P'; } void print() const override { airplane::print(); cout << ", Airline: " << airline << ", # of passengers: " << n_passengers << endl; } }; #endif // cargo.h #ifndef CARGO_H #define CARGO_H #include "airplane.h" #include #include using namespace std; class cargo : public airplane { private: string company; int max_capacity; public: cargo(const string& _manufacturer, const string& _model, const string& _tail_number, const string& _company, int _max_capacity) : airplane(_manufacturer, _model, _tail_number), company(_company), max_capacity(_max_ca Code for airplane.h 1234567891011121314151617181920212223242526272829// airplane.h#ifndef AIRPLANE_H#define AIRPLANE_H#include #include using namespace std;class airplane {private: string manufacturer; string model; string tail_number;public: airplane(const string& _manufacturer, const string& _model, const string& _tail_number) : manufacturer(_manufacturer), model(_model), tail_number(_tail_number) {} virtual char get_type() const = 0; virtual void print() const { cout << "Manufacturer: " << manufacturer << ", Model: " << model << ", Tail number: " << tail_number; } virtual ~airplane() {}};#endif ההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Code for passenger.h 123456789101112131415161718192021222324252627282930313233343536#ifndef PASSENGER_H#define PASSENGER_H#include "airplane.h"#include #include using namespace std;// Implement public inheritance from the airplane class// Call the overloaded constructor of the base class in the class overloaded constructor// Use the virtual qualifier when neededclass passenger // Implement public inheritance from the airplane class { private: string airline; int n_passengers; public: passenger(const string & _manufacturer, const string & _model, const string & _tail_number, const string & _airline, int _n_passengers): // Call the overloaded constructor of the base class here { airline = _airline; n_passengers = _n_passengers; } ~passenger(){} char get_type() const {return 'P';} void print() const { airplane::print(); cout << ", Airline: " << airline << ", # of passengers: " << n_passengers << endl; }};#endif ההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Code for cargo.h 1234567891011121314151617181920212223242526272829303132333435#ifndef CARGO_H#define CARGO_H#include "airplane.h"#include using namespace std;// Implement public inheritance from the airplane class// Call the overloaded constructor of the base class in the class overloaded constructor// Use the virtual qualifier when neededclass cargo // Implement public inheritance from the airplane class { private: string company; int max_capacity; public: cargo(const string & _manufacturer, const string & _model, const string & _tail_number, const string & _company, int _max_capacity): // Call the overloaded constructor of the base class here { company = _company; max_capacity = _max_capacity; } ~cargo(){} char get_type() const {return 'C';} void print() const { airplane::print(); cout << ", Company: " << company << ", Max Capacity (tons): " << max_capacity << endl; }};#endif ההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Code for airport.cpp 234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253#include "airport.h"#include using namespace std;// Write the implementation of the requested member functions void airport::summary const{ int num_passenger = 0, num_cargo = 0; for (size_t i=0, i < airplanes.size(); ++i) { if (airplane[i]) { if (airplane[i]) get_type() - > == 'P' num_passenger ++; else (airplane[i]) get_type() - > == "C" num_cargo ++; } cout <<"Airport city: " << city << endl; cout <<"Airport code: " << code << endl; cout <<"# Passeneger airplanes:" << num_passenger << endl; cout <<"# Cargo airplanes:" << num_cargo << endl;}void airport::list_airplane() const{ cout <<"Passenger airplanes:" endl; for (size_t i=0 i < airplane.size(); ++1 { if (airplane[i] && airplane[i] - > get_type() == 'P') airplane[i]- > print(); } cout <<"Cargo airplanes:" << endl; for (size_t i=0, i < airplanes.size(); ++1) { if (airplane[i] && airplane[i] - > get_type() == 'C') airplane[i] - > print(); }}// Output messages for the summary function// cout << "Airport city: " << /* variable identifier */ << endl;// cout << "Airport code: " << /* variable identifier */ << endl;// cout << "# Passenger airplanes: " << /* variable identifier */ << endl;// cout << "# Cargo airplanes: " << /* variable identifier */ << endl;// Output messages for the list_airplanes function// cout << "Passenger airplanes: " << endl;// cout << "Cargo airplanes: " << endl;// I need you to modify the give code for airport.cpp ההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX M.util.js_pending('qtype_coderunner/userinterfacewrapper'); require(['qtype_coderunner/userinterfacewrapper'], function(amd) { amd.newUiWrapper("ace", "id_q55064:2_answer-ace_field1"); M.util.js_complete('qtype_coderunner/userinterfacewrapper'); }); M.util.js_pending('qtype_coderunner/userinterfacewrapper'); require(['qtype_coderunner/userinterfacewrapper'], function(amd) { amd.newUiWrapper("ace", "id_q55064:2_answer-ace_field2"); M.util.js_complete('qtype_coderunner/userinterfacewrapper'); }); M.util.js_pending('qtype_coderunner/userinterfacewrapper'); require(['qtype_coderunner/userinterfacewrapper'], function(amd) { amd.newUiWrapper("ace", "id_q55064:2_answer-ace_field3"); M.util.js_complete('qtype_coderunner/userinterfacewrapper'); }); M.util.js_pending('qtype_coderunner/userinterfacewrapper'); require(['qtype_coderunner/userinterfacewrapper'], function(amd) { amd.newUiWrapper("ace", "id_q55064:2_answer-ace_field4"); M.util.js_complete('qtype_coderunner/userinterfacewrapper'); }); Check Question 1

BlackTom AI · Accepted Answer

The provided JSON for this question includes a substantial code prompt and references to multiple source files, but the field for answer_options is empty. Because there are no explicit answer choices to evaluate, I will instead outline a detailed, step-by-step reasoning about how to implement the requested member functions and how to assess typical options that would appear in a correct solution. First, summarize the task at hand in this context: you are to implement the member functions summary and list_airplanes for the airport class, given polymorphic airplane types (passenger and cargo) and the ability to store pointers to airplanes in a vector. The existing airport class already provides a constructor, copy constructor, assignment operator, destructor, and add_airplane, with a working infrastructure for deep copies and proper memory management. The hint indicates you can reuse patterns from the provided code in other functions, and the note says input is correct and no main function is required. Now, consider how a correct implementation would conceptually behave: Option A (typical correct approach for summary): - Iterate over the airplanes vector. - For each non-nullptr airplane, inspect its dynamic type using get_type() (which returns 'P' for passenger and 'C' for cargo). - Maintain two counters: one for the number of passenger airplanes and one for cargo airplanes. - After the loop, print a concise summary consisting of the airport city, airport code, and the two counts. - Rationale: summary is intended to provide a quick overview of what is housed at the airport, separating passenger and cargo fleets. Using get_type() avoids needing RTTI and aligns with the provided design where each derived class overrides get_type(). Option B (common mistake with summary): - Print information inside the loop for each airplane rather than aggregating counts first. - Rationale: while printing per-airplane data could be useful, the summary function is typically meant to present aggregate counts in one place, not a line-by-line per-aircraft report, unless explicitly specified. Option C (typical correct approach for list_airplanes): - Print a header like "Passenger airplanes:" followed by printing each airplane of type 'P' by calling its print() method. - Then print a header like "Cargo airplanes:" followed by printing each airplane of type 'C'. - Rationale: this matches the intended separation of airplane types and leverages the polymorphic print() function implemented in each derived class to display relevant fields (manufacturer, model, tail_number, plus subclass-specific fields). Option D (common mistake with list_airplanes): - Iterate and call print() on all airplanes regardless of type, producing mixed output without distinction between passenger and cargo. - Rationale: this would neglect the requested separation into two categories and would not align with the given specification in the prompt that asks for separate lists by type. Option E (edge-case handling within both functions): - Ensure the code checks for nullptr before dereferencing airplanes[i], to avoid segmentation faults when the vector contains null pointers. - Rationale: although the provided airport destructor and copy/assignment implementations carefully manage memory, defensive checks remain important in iteration. Option F (runtime details to be mindful of): - When using get_type(), compare against the exact characters 'P' and 'C'. Ensure there are no off-by-one or bounds issues in the loop. Use size_t for indices to avoid signed/unsigned mismatches. - Rationale: these are common sources of subtle bugs in C++ code that manipulates vectors and raw pointers. Putting it together for a coherent, correct implementation pattern: - summary(): - Initialize int num_passenger = 0; int num_cargo = 0; - For each airplane* plane in airplanes: - if (plane != nullptr) { - if (plane->get_type() == 'P') ++num_passenger; else if (plane->get_type() == 'C') ++num_cargo; - } - Print the following in order (using the class's city and code members): - "Airport city: " << city - "Airport code: " << code - "# Passenger airplanes: " << num_passenger - "# Cargo airplanes: " << num_cargo - list_airplanes(): - Print header: "Passenger airplanes:" - For each airplane* plane in airplanes: - if (plane != nullptr && plane->get_type() == 'P') plane->print(); - Print header: "Cargo airplanes:" - For each airplane* plane in airplanes: - if (plane != nullptr && plane->get_type() == 'C') plane->print(); Notes on the surrounding code you were given and how it informs these decisions: - The airport class stores vector airplanes, so you must dereference plane pointers carefully and rely on virtual functions (print()) implemented by derived classes to display type-specific details. - The copy constructor and assignment operator perform deep copies by creating new passenger or cargo objects based on get_type(), which reinforces the pattern to use get_type() in both summary and list_airplanes to classify objects. - The provided destructors clean up memory by deleting each non-nullptr entry, so your iteration in summary and list_airplanes should be read-only (no deletions) and only call print() or read properties. Given that the answer_options field is empty, these explanations cover what a correct implementation would look like and what common correct and incorrect approaches would entail. If you provide explicit answer options (A, B, C, etc.), I can map each option to this reasoning and indicate which are correct and why, with a formatted, option-by-option justification.

COSC 1437 - 15099 - Introduction to Programming

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