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#include <iostream>
#include <iomanip>
#include <cstdlib>
using namespace std;
struct movie
{
string title;
int viewed_year;
int rating;
movie* next;
};
void update_movie(movie*, int);
void remove_movie(movie*, int*);
void list_movie(const movie*);
void arrange_by_title(movie*);
void arrange_by_rating(movie* );
void arrange_by_viewed(movie* );
void print_menu(); // prints main menu
// head pointer is "firstmovie"
int main()
{
int size = 0;
char choice;
movie* firstmovie = 0;
string title1, title2, title3; // 3 Strings to store names of the movies
int viewed_year1, viewed_year2, viewed_year3; // 3 ints's to store viewed year of the movies
int rating1, rating2, rating3; // 3 ints's to store rating of the movies
// 3 movie objects to store the movies
movie a = { title1, viewed_year1, rating1 };
movie b = { title2, viewed_year2, rating2 };
movie c = { title3, viewed_year3, rating3 };
// add the three nodes into the linked list
a.next = firstmovie;
firstmovie = &a;
size++;
b.next = firstmovie;
firstmovie = &b;
size++;
c.next = firstmovie;
firstmovie = &c;
size++;
print_menu();
cin >> choice;
while (choice != 'Q' && choice != 'q') // && means 'and' operator
{
switch (choice) {
case 'U':
case 'u':
update_movie(firstmovie, size);
break;
case 'E':
case 'e':
remove_movie(firstmovie, &size);
break;
case 'L':
case 'l':
list_movie(firstmovie);
break;
case 'T':
case 't':
arrange_by_title(firstmovie);
break;
case 'V':
case 'v':
arrange_by_viewed(firstmovie);
break;
case 'R':
case 'r':
arrange_by_rating(firstmovie);
break;
default:
cout << "**Invalid choice, please enter again**" << endl;
break;
}
print_menu();
cin >> choice;
}
}
void print_menu()
{
cout << "| Menu |\n" << endl;
cout << "U Update a movie" << endl;
cout << "E rEmove a movie" << endl;
cout << "L List all movies" << endl;
cout << "T arrange by Title" << endl;
cout << "V arrange by year Viewed" << endl;
cout << "R arrange by Rating" << endl;
cout << "Q Quit" << endl;
cout << "...your choice:";
}
void update_movie(movie* head, int size) // Help here please
{
cout << "****Update Movie Menu" << endl;
movie* firstmovie = 0;
movie*p;
for (p = head; p; p = p->next)
if (p->title == "q") break;
if (p)
{
if (head == p) head = p->next;
cout << "Which movie to update [1-3]: ";
cin >> p->title;
cout << "Enter an updated name for " << p->title << " :";
cin >> p->title;
cout << "Enter the year you saw " << p->viewed_year << " [like 2016]:";
cin >> buf; p->viewed_year = atoi(buf);
cout << "Enter the rating for " << p << " [1, 2, 3, 4, 5]:";
cin >> buf; p->rating = atoi(buf);
}
else
cout << "**Invalid choice, please enter again**";
cout << "\nUpdated movie list after updating" << endl;
print_menu();
}
void remove_movie(movie* head, int* size) // Help here also
{
cout << "****Remove Movie Menu" << endl;
movie*p , *prev;
for (p = head, prev = 0; p; prev = p, p = p->next)
if (p->title == "q" && "Q" ) break;
if (p)
{
if (prev) prev->next = p->next;
else head = p->next;
}
else
cout << "**Invalid choice, please enter again**";
}
void list_movie(const movie* head) // prints list of movies
{
cout << "****List Movie Menu" << endl;
cout << "#" << setw(15) << "Movie Title" << setw(8) << "Viewed" << setw(8) << "Rating" << endl;
cout << "==========================================" << endl;
int i = 1;
for (const movie* p = head; p; p = p->next)
{
cout << i++;
cout << setw(15) << p->title;
cout << setw(6) << p->viewed_year;
cout << setw(6) << p->rating << endl;
}
}
void arrange_by_title(movie* head) // prints movies arranged by title
{
cout << "****Arrange Movie By Title Menu" << endl;
for (movie* p = head; p; p = p->next)
for (movie* q = p->next; q; q = q->next)
if (q->title < p->title)
{
swap(*p, *q);
swap(p->next, q->next);
}
}
void arrange_by_rating(movie* head) // prints movies arranged by rating
{
cout << "****Arrange Movie By Rating Menu" << endl;
for (movie* p = head; p; p = p->next)
for (movie* q = p->next; q; q = q->next)
if (q->rating < p->rating)
{
swap(*p, *q);
swap(p->next, q->next);
}
}
void arrange_by_viewed(movie* head) // prints movies arranged by year viewed
{
cout << "****Arrange Movie By Viewed Menu" << endl;
for (movie* p = head; p; p = p->next)
for (movie* q = p->next; q; q = q->next)
if (q->viewed_year < p->viewed_year)
{
swap(*p, *q);
swap(p->next, q->next);
}
}
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