MovieList

Question 1

MovieList();

Answer 1

MovieList::MovieList(): head(NULL){}

Question 2

~MovieList();

Answer 2

MovieList::~MovieList(){
Node* currNode = head;
Node* nextNode = NULL;

while(currNode!=NULL){
    nextNode = currNode->next;
    delete currNode;
    currNode = nextNode;
} }

Question 3

void addFront(Movie*);

Answer 3

void MovieList::addFront(Movie* m){
Node* currNode = new Node();
currNode->data = m;
currNode->next = head;
head = currNode;
}

Question 4

void addBack(Movie*);

Answer 4

void MovieList::addBack(Movie* m){
Node* currNode = new Node();
Node *last = head;
currNode->data = m;
currNode->next = NULL;

if (head == NULL){ 
    head = currNode; 
    return; 
} 

while (last->next != NULL){
    last = last->next; 
}

last->next = currNode; 
return;  }

Question 5

bool get(const string& title, Movie**) const;

Answer 5

bool MovieList::get(const string& title, Movie** m) const{
Node * currNode;
currNode = head;

while (currNode!=NULL){
    if (currNode->data->getTitle() == title){
       break; 
    }
    currNode = currNode->next;
}

if (currNode == NULL){
    *m = NULL;
    return false;
}

*m = currNode->data;
return true; }

Question 6

bool remove(const string& title, Movie**);

Answer 6

bool MovieList::remove(const string& title, Movie ** m){
Node * currNode;
Node * prevNode;
currNode = head;
prevNode = NULL;

while (currNode!=NULL){
    if (currNode->data->getTitle() == title){
       break; 
    }
    prevNode = currNode;
    currNode = currNode->next;
}

if (currNode == NULL){
    *m = NULL;
    return false;
}

if (prevNode == NULL){
    head = currNode->next;
}else{
    prevNode->next = currNode->next;
}

*m = currNode->data;
delete currNode;  
return true;   }

Question 7

void getFamilyMovies(MovieList& fam) const;

Answer 7

void MovieList::getFamilyMovies(MovieList& fam) const{
Node * currNode;
currNode = head;

while (currNode!=NULL){
    if (currNode->data->isfamilyMovie()){
       fam.addBack(currNode->data);
    }
    currNode = currNode->next;
}  }

Question 8

void clear();

Answer 8

void MovieList::clear(){
Node* currNode = head;
Node* nextNode = NULL;

while(currNode!=NULL){
    nextNode = currNode->next;
    delete currNode->data;
    delete currNode;
    currNode = nextNode;
}
head = NULL; }