Objectives The main objective of this assignment is checking .docx
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Objectives: The main objective of this assignment is checking students’ ability to implement membership functions. After completing this assignment, students will be able to:
· implement member functions
· use standalone functions and member functions
· call member functions
· implement constr...
Slide Content
Objectives: The main objective of this assignment is checking
students’ ability to implement membership functions. After
completing this assignment, students will be able to:
· implement member functions
· use standalone functions and member functions
· call member functions
· implement constructors
· use struct within a struct
Problem description: In this assignment, you must add
functionality to a program that sells movie tickets and assigns
theater rooms to movies. The program is intended to be used by
movie theater tellers. The available movies are loaded from the
“movies.txt’ file while the rooms in which the movies are
displayed are loaded from “rooms.txt” file.
The “movies.txt” file contains the number of films playing at
the theater in the first line. Then each line corresponds to a
film, and includes the title, the runtime, and the expected
performance in terms of sales (“2” indicates high expected
yield, “1” medium, and “0” low yield). The expected yield is
used when assigning the films to a room, as each of the ten
rooms has a different number of seats. When assigning films to
rooms, the films with a high expected yield must be assigned to
the bigger rooms when possible.
The “rooms.txt” file contains the room ID which is represented
by a letter (A, B, C, etc.), and the number of seats in the room.
Once the films have been assigned to rooms, tickets can be sold
to viewers. When a ticket is purchased, the number of remaining
seats in the room decrements. A viewer can purchase multiple
tickets as long as enough seats remain available. Thus, prior to
selling a ticket, the films must be displayed along with the total
number of seats, available seats, runtime, expected yield (high,
students’ ability to implement membership functions. After
completing this assignment, students will be able to:
· implement member functions
· use standalone functions and member functions
· call member functions
· implement constructors
· use struct within a struct
Problem description: In this assignment, you must add
functionality to a program that sells movie tickets and assigns
theater rooms to movies. The program is intended to be used by
movie theater tellers. The available movies are loaded from the
“movies.txt’ file while the rooms in which the movies are
displayed are loaded from “rooms.txt” file.
The “movies.txt” file contains the number of films playing at
the theater in the first line. Then each line corresponds to a
film, and includes the title, the runtime, and the expected
performance in terms of sales (“2” indicates high expected
yield, “1” medium, and “0” low yield). The expected yield is
used when assigning the films to a room, as each of the ten
rooms has a different number of seats. When assigning films to
rooms, the films with a high expected yield must be assigned to
the bigger rooms when possible.
The “rooms.txt” file contains the room ID which is represented
by a letter (A, B, C, etc.), and the number of seats in the room.
Once the films have been assigned to rooms, tickets can be sold
to viewers. When a ticket is purchased, the number of remaining
seats in the room decrements. A viewer can purchase multiple
tickets as long as enough seats remain available. Thus, prior to
selling a ticket, the films must be displayed along with the total
number of seats, available seats, runtime, expected yield (high,
medium, low), and room ID.
When purchasing a ticket, the viewer is prompted for the
number of tickets he/she wishes to purchase. Then the teller can
enter the movie title to check its availability and prompt for
another title if no seats remain. The teller can always cancel a
transaction by inserting “cancel” instead of a movie title.
Once a customer has selected the movie and the number of
tickets, the price must be displayed. A single ticket costs 7.25
dollars.
Implementation Details
You have been provided with working code. The program
utilizes two structs, Movie, and MovieTheater.
The Movie struct has the following member variables:
1. string title: title of the movie, no spaces
allowed
2. double runtime: how long the movie lasts in minutes
3. int expectedYield: Possible values (2,1,0) which
correspond to (high, medium, low)
4. char roomID: ID of the room movie is playing in.
Possible values: A, B, C, D, etc.
5. int capacity: How many viewers can fit in room.
6. int available: How many available for purchase
still remain.
MovieTheater struct has the following member variables:
1. Movie *movies: dynamic array of Movie objects.
2. int numMovies: number of movies in array
Use of global variables will incur a deduction of 10 points from
your total points.
When purchasing a ticket, the viewer is prompted for the
number of tickets he/she wishes to purchase. Then the teller can
enter the movie title to check its availability and prompt for
another title if no seats remain. The teller can always cancel a
transaction by inserting “cancel” instead of a movie title.
Once a customer has selected the movie and the number of
tickets, the price must be displayed. A single ticket costs 7.25
dollars.
Implementation Details
You have been provided with working code. The program
utilizes two structs, Movie, and MovieTheater.
The Movie struct has the following member variables:
1. string title: title of the movie, no spaces
allowed
2. double runtime: how long the movie lasts in minutes
3. int expectedYield: Possible values (2,1,0) which
correspond to (high, medium, low)
4. char roomID: ID of the room movie is playing in.
Possible values: A, B, C, D, etc.
5. int capacity: How many viewers can fit in room.
6. int available: How many available for purchase
still remain.
MovieTheater struct has the following member variables:
1. Movie *movies: dynamic array of Movie objects.
2. int numMovies: number of movies in array
Use of global variables will incur a deduction of 10 points from
your total points.
PART A:
Task 1:
Implement a constructor for the Movie struct.
Task 2:
In the current state of the program, the movies and rooms are
loaded in order from the file. This results in movies with a low
expected yield to be assigned rooms of high capacity. This can
be seen in the figure below, where the film “Judy” which has a
low expected yield, is assigned a bigger room than “It” which
has a high yield. To fix this issue, you must implement a
SortMovies function as a member function of the MovieTheater
struct. This function will place films with higher yield, earlier
on the list. Thus, if this function is called before the
“LoadRooms” function, it will assign the bigger rooms to the
films with higher expected yield. Note that this is possible,
because the rooms are written in order of capacity in
“rooms.txt.” Once implemented and called appropriately, the
initial output of the program should look like the figure below.
Figure 1. Without Sort
Figure 2. With Sort
PART B:
Task 3:
You must convert the SortMovies member function, into a
standalone function in main.cpp. The output should be identical
to the output of Task 2.
Hints:
You can use the movies array, within the MovieTheater member
Task 1:
Implement a constructor for the Movie struct.
Task 2:
In the current state of the program, the movies and rooms are
loaded in order from the file. This results in movies with a low
expected yield to be assigned rooms of high capacity. This can
be seen in the figure below, where the film “Judy” which has a
low expected yield, is assigned a bigger room than “It” which
has a high yield. To fix this issue, you must implement a
SortMovies function as a member function of the MovieTheater
struct. This function will place films with higher yield, earlier
on the list. Thus, if this function is called before the
“LoadRooms” function, it will assign the bigger rooms to the
films with higher expected yield. Note that this is possible,
because the rooms are written in order of capacity in
“rooms.txt.” Once implemented and called appropriately, the
initial output of the program should look like the figure below.
Figure 1. Without Sort
Figure 2. With Sort
PART B:
Task 3:
You must convert the SortMovies member function, into a
standalone function in main.cpp. The output should be identical
to the output of Task 2.
Hints:
You can use the movies array, within the MovieTheater member
functions, as if it was a regular array. i.e. you can access a
movie with index “movies[0] or movies[1], etc.” You must still
use the “dot” operator to access member variables and functions
when accessing outside the struct.
When implementing the standalone function, it must still
interact within the array in MovieTheater. You could pass the
whole object to the function, by value or by reference, or you
could just pass the array, and number of elements.
Main cpp.
#include <iostream>
#include <fstream>
//#include "Movie.h"
#include "MovieTheater.h"
#include <iomanip>
#include <cstdlib>
using namespace std;
void PressKeyToContinue();
void LoadMovies(Movie movies[]);
void LoadRooms(Movie movies[], int size);
void SellTickets(int numTickets, Movie movies[], int size);
void Operate(MovieTheater cinema);
void PrintPrice(int numTickets);
void GetTicketNumber(int &tickets);
int SelectMovie(Movie movies[], int size);
int GetMovieIndex(Movie movies[], int size, string movie);
int main(){
MovieTheater cinema;
movie with index “movies[0] or movies[1], etc.” You must still
use the “dot” operator to access member variables and functions
when accessing outside the struct.
When implementing the standalone function, it must still
interact within the array in MovieTheater. You could pass the
whole object to the function, by value or by reference, or you
could just pass the array, and number of elements.
Main cpp.
#include <iostream>
#include <fstream>
//#include "Movie.h"
#include "MovieTheater.h"
#include <iomanip>
#include <cstdlib>
using namespace std;
void PressKeyToContinue();
void LoadMovies(Movie movies[]);
void LoadRooms(Movie movies[], int size);
void SellTickets(int numTickets, Movie movies[], int size);
void Operate(MovieTheater cinema);
void PrintPrice(int numTickets);
void GetTicketNumber(int &tickets);
int SelectMovie(Movie movies[], int size);
int GetMovieIndex(Movie movies[], int size, string movie);
int main(){
MovieTheater cinema;
LoadMovies(cinema.movies);
LoadRooms(cinema.movies, cinema.numMov ies);
Operate(cinema);
return 0;
}
void Operate(MovieTheater cinema){
int numTickets = 0;
while(true){
cinema.PrintMovies();
GetTicketNumber(numTickets);
SellTickets(numTickets, cinema.movies,
cinema.numMovies);
numTickets = 0;
system("CLS");
}
}
void PressKeyToContinue(){
string key;
cout<<"Press any key to continue:";
cin>>key;
}
void SellTickets(int numTickets, Movie movies[], int size){
int movieIndex = -1;
movieIndex = SelectMovie(movies, size);
if(movieIndex != -1 && movies[movieIndex].available >=
numTickets){
movies[movieIndex].available =
movies[movieIndex].available- numTickets;
PrintPrice(numTickets);
}
LoadRooms(cinema.movies, cinema.numMov ies);
Operate(cinema);
return 0;
}
void Operate(MovieTheater cinema){
int numTickets = 0;
while(true){
cinema.PrintMovies();
GetTicketNumber(numTickets);
SellTickets(numTickets, cinema.movies,
cinema.numMovies);
numTickets = 0;
system("CLS");
}
}
void PressKeyToContinue(){
string key;
cout<<"Press any key to continue:";
cin>>key;
}
void SellTickets(int numTickets, Movie movies[], int size){
int movieIndex = -1;
movieIndex = SelectMovie(movies, size);
if(movieIndex != -1 && movies[movieIndex].available >=
numTickets){
movies[movieIndex].available =
movies[movieIndex].available- numTickets;
PrintPrice(numTickets);
}
else if(movieIndex!=-1 && movies[movieIndex].available <
numTickets){
cout<<"No Room Available"<<endl;
PressKeyToContinue();
}
}
void PrintPrice(int numTickets){
double price = 7.25;
cout<<"Price:"<<price*numTickets<<endl<<endl;
PressKeyToContinue();
}
void GetTicketNumber(int &tickets){
while(tickets == 0){
cout<<"How many tickets?:";
cin>>tickets;
cout<<endl;
if(tickets<0 || tickets>390){
cout<<"Invalid Ticket Number, must be greater than 0
and smaller than 391"<<endl;
tickets = 0;
}
}
}
int SelectMovie(Movie movies[], int size){
string movie = "";
int movieIndex = -1;
while(movie == ""){
cout<<"Enter movie name or \"cancel\" :";
cin>> movie;
if(movie == "cancel"){
cout<<"Ticket Purchase Canceled"<<endl;
PressKeyToContinue();
numTickets){
cout<<"No Room Available"<<endl;
PressKeyToContinue();
}
}
void PrintPrice(int numTickets){
double price = 7.25;
cout<<"Price:"<<price*numTickets<<endl<<endl;
PressKeyToContinue();
}
void GetTicketNumber(int &tickets){
while(tickets == 0){
cout<<"How many tickets?:";
cin>>tickets;
cout<<endl;
if(tickets<0 || tickets>390){
cout<<"Invalid Ticket Number, must be greater than 0
and smaller than 391"<<endl;
tickets = 0;
}
}
}
int SelectMovie(Movie movies[], int size){
string movie = "";
int movieIndex = -1;
while(movie == ""){
cout<<"Enter movie name or \"cancel\" :";
cin>> movie;
if(movie == "cancel"){
cout<<"Ticket Purchase Canceled"<<endl;
PressKeyToContinue();
return -1;
}
else{
movieIndex = GetMovieIndex(movies, size, movie);
if(movieIndex == -1){
cout<<"Movie Not found"<<endl;
movie = "";
//PressKeyToContinue();
}
else
return movieIndex;
}
}
}
int GetMovieIndex(Movie movies[], int size, string movie){
for(int i=0; i<size; i++){
if(movies[i].title == movie)
return i;
}
return -1;
}
void LoadMovies(Movie movies[]){
int numMovies;
ifstream infile;
infile.open("movies.txt");
infile>>numMovies;
for(int i=0; i<numMovies; i++){
infile>>movies[i].title;
infile>>movies[i].runTime;
infile>>movies[i].expectedYield;
}
}
else{
movieIndex = GetMovieIndex(movies, size, movie);
if(movieIndex == -1){
cout<<"Movie Not found"<<endl;
movie = "";
//PressKeyToContinue();
}
else
return movieIndex;
}
}
}
int GetMovieIndex(Movie movies[], int size, string movie){
for(int i=0; i<size; i++){
if(movies[i].title == movie)
return i;
}
return -1;
}
void LoadMovies(Movie movies[]){
int numMovies;
ifstream infile;
infile.open("movies.txt");
infile>>numMovies;
for(int i=0; i<numMovies; i++){
infile>>movies[i].title;
infile>>movies[i].runTime;
infile>>movies[i].expectedYield;
}
infile.close();
}
void LoadRooms(Movie movies[], int size){
ifstream infile;
infile.open("rooms.txt");
for(int i=0; i<size; i++){
infile>>movies[i].roomID;
infile>>movies[i].capacity;
movies[i].available = movies[i].capacity;; //initial
availability is equal to capacity as no tickets are sold
}
infile.close();
}
Movie.cpp#include "Movie.h"Movie::Movie(){ //FILL IN}
Movie txt9 Gemini_Man 117.9
2Joker 122.8 2Zombieland
99.5 2Knives_Out
130.1 1Judy 118.3
0Downton_Abbey 123.8 0It
170.0 2Black_and_Blue
108.4 1Terminator_Dark_Fate 134.9 1
Movie theater.cpp#include
"MovieTheater.h"MovieTheater::MovieTheater(){ numMovies
= GetNumMovies(); movies = new
Movie[numMovies];}MovieTheater::~MovieTheater(){
delete[] movies;}int MovieTheater::GetNumMovies(){ int
num; ifstream infile; infile.open("movies.txt");
if(!infile){ cout<<"Cannot Open File movies.txt"<<endl;
return 0; } else{ infile>>num; infile.close();
return num; }}void MovieTheater::PrintMovies(){
}
void LoadRooms(Movie movies[], int size){
ifstream infile;
infile.open("rooms.txt");
for(int i=0; i<size; i++){
infile>>movies[i].roomID;
infile>>movies[i].capacity;
movies[i].available = movies[i].capacity;; //initial
availability is equal to capacity as no tickets are sold
}
infile.close();
}
Movie.cpp#include "Movie.h"Movie::Movie(){ //FILL IN}
Movie txt9 Gemini_Man 117.9
2Joker 122.8 2Zombieland
99.5 2Knives_Out
130.1 1Judy 118.3
0Downton_Abbey 123.8 0It
170.0 2Black_and_Blue
108.4 1Terminator_Dark_Fate 134.9 1
Movie theater.cpp#include
"MovieTheater.h"MovieTheater::MovieTheater(){ numMovies
= GetNumMovies(); movies = new
Movie[numMovies];}MovieTheater::~MovieTheater(){
delete[] movies;}int MovieTheater::GetNumMovies(){ int
num; ifstream infile; infile.open("movies.txt");
if(!infile){ cout<<"Cannot Open File movies.txt"<<endl;
return 0; } else{ infile>>num; infile.close();
return num; }}void MovieTheater::PrintMovies(){
cout<<setw(40)<<"Playing Now"<<endl<<endl;
cout<<setw(30)<<std::left<<"FILM"<<setw(15)<<"TOTAL
SEATS"<<setw(15)<<"AVAIL.
SEATS"<<setw(15)<<"RUNTIME"<<setw(15)<<"EXPECTED
YIELD"<<setw(15)<<"ROOM"<<endl; for(int i=0;
i<numMovies; i++){
cout<<setw(30)<<std::left<<movies[i].title
<<setw(15)<<movies[i].capacity
<<setw(15)<<movies[i].available
<<setw(15)<<movies[i].runTime
<<setw(15)<<ConvertYieldToString(movies[i].expectedYield)
<<setw(15)<<movies[i].roomID<<endl; }
cout<<endl<<endl;}string
MovieTheater::ConvertYieldToString(int yield){ if(yield ==
2) return "high"; else if(yield == 1) return
"medium"; else if(yield == 0) return "low"; else
return "error";}
Movie theater.h#ifndef MOVIETHEATER_ H#define
MOVIETHEATER_H#include "Movie.h"#include
<fstream>#include <iomanip>struct MovieTheater{ //member
functions MovieTheater(); //constructor ~MovieTheater();
//destructor void PrintMovies(); int GetNumMovies();
string ConvertYieldToString(int yield); //member variables
int numMovies; Movie *movies;};#endif //
MOVIETHEATER_H
Room txtA 390B 390C 300D 300E 300F
250G 250H 250I 250
Movie.h#ifndef MOVIE_H#define MOVIE_H#include
<string>#include <iostream>using namespace std;struct Movie{
Movie(); string title; double runTime; int
expectedYield; char roomID; int capacity; int
available;};#endif // MOVIE_H
cout<<setw(30)<<std::left<<"FILM"<<setw(15)<<"TOTAL
SEATS"<<setw(15)<<"AVAIL.
SEATS"<<setw(15)<<"RUNTIME"<<setw(15)<<"EXPECTED
YIELD"<<setw(15)<<"ROOM"<<endl; for(int i=0;
i<numMovies; i++){
cout<<setw(30)<<std::left<<movies[i].title
<<setw(15)<<movies[i].capacity
<<setw(15)<<movies[i].available
<<setw(15)<<movies[i].runTime
<<setw(15)<<ConvertYieldToString(movies[i].expectedYield)
<<setw(15)<<movies[i].roomID<<endl; }
cout<<endl<<endl;}string
MovieTheater::ConvertYieldToString(int yield){ if(yield ==
2) return "high"; else if(yield == 1) return
"medium"; else if(yield == 0) return "low"; else
return "error";}
Movie theater.h#ifndef MOVIETHEATER_ H#define
MOVIETHEATER_H#include "Movie.h"#include
<fstream>#include <iomanip>struct MovieTheater{ //member
functions MovieTheater(); //constructor ~MovieTheater();
//destructor void PrintMovies(); int GetNumMovies();
string ConvertYieldToString(int yield); //member variables
int numMovies; Movie *movies;};#endif //
MOVIETHEATER_H
Room txtA 390B 390C 300D 300E 300F
250G 250H 250I 250
Movie.h#ifndef MOVIE_H#define MOVIE_H#include
<string>#include <iostream>using namespace std;struct Movie{
Movie(); string title; double runTime; int
expectedYield; char roomID; int capacity; int
available;};#endif // MOVIE_H
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