complete the code

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, 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.

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 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;

LoadMovies(cinema.movies);

LoadRooms(cinema.movies, cinema.numMovies);

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();

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;

}

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 txt
9	
Gemini_Man				117.9		2
Joker					122.8		2
Zombieland				99.5		2
Knives_Out				130.1		1
Judy					118.3		0
Downton_Abbey			123.8		0
It						170.0		2
Black_and_Blue			108.4		1
Terminator_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 txt
A	390
B	390
C	300
D	300
E	300
F 	250
G	250
H	250
I	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