diff options
Diffstat (limited to 'I_anno/Programmazione_2/data_structures/list.cc')
-rw-r--r-- | I_anno/Programmazione_2/data_structures/list.cc | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/I_anno/Programmazione_2/data_structures/list.cc b/I_anno/Programmazione_2/data_structures/list.cc deleted file mode 100644 index 8ddcbf9..0000000 --- a/I_anno/Programmazione_2/data_structures/list.cc +++ /dev/null @@ -1,164 +0,0 @@ -#include<iostream> - -using namespace std; - -template<typename T> -struct node { - T value; - node* next; -}; - - -template<typename T> -class list { -public: - list() : _head{nullptr} {} - - ~list() { - while(_head) { - node<T>* tmp = _head->next; - delete tmp; - _head = tmp; - } - } - - list* push_front(T val) { - _head = new node<T>{val, _head}; - - return this; - } - - list* push_back(T val) { - if(!_head) return this->push_front(val); - - node<T>* iter = _head; - while(iter->next) { - iter = iter->next; - } - iter->next = new node<T>{val, nullptr}; - - return this; - } - - list* push_after_value(T val, T newval) { - node<T>* iter = _search(val); - if(iter) - iter->next = new node<T>{newval, iter->next}; - - return this; - } - - list* push_before_value(T val, T newval) { - node<T>* elem = _search(val); - if(!elem) return this; - - node<T>* iter = _head; - - if(iter->value == val) - return this->push_front(newval); - - while(iter->next != elem) - iter = iter->next; - - iter->next = new node<T>{newval, iter->next}; - - return this; - } - - list* pop(int val) { - node<T>* elem = _search(val); - if(!elem) return this; - - node<T>* iter = _head; - if(iter == elem) return this->pop_front(); - - while(iter->next != elem) - iter = iter->next; - - node<T>* temp = iter->next; - iter->next = iter->next->next; - delete temp; - - return this; - } - - list* pop_front() { - if(!_head) - return this; - - node<T>* elem = _head; - _head = _head->next; - delete elem; - - return this; - } - - list* pop_back() { - if(!_head) - return this; - - node<T>* iter = _head; - - while(iter->next && iter->next->next) { - iter = iter->next; - } - - if(!iter->next) { - delete iter; - _head = nullptr; - } else if(iter->next->next) { - delete iter->next->next; - } else { - delete iter->next; - } - - iter->next = nullptr; - - return this; - } - - void print() { - node<T>* iter = _head; - while(iter) { - cout << iter->value << ' '; - iter = iter->next; - } - } -private: - node<T>* _search(T value) { - node<T>* iter = _head; - while(iter && iter->value != value) - iter = iter->next; - - return iter; - } - - node<T>* _head; -}; - -int main() { - list<int>* l = new list<int>{}; - l->push_front(2)->push_front(1); - l->print(); cout << endl; - l->push_back(5); - l->print(); cout << endl; - l->push_back(10)->push_back(15); - l->print(); cout << endl; - l->push_after_value(5, 6); - l->print(); cout << endl; - l->push_before_value(5, 4); - l->print(); cout << endl; - l->push_before_value(4, 3); - l->print(); cout << endl; - l->pop_back(); - l->print(); cout << endl; - l->pop_front(); - l->print(); cout << endl; - l->push_front(1); - l->print(); cout << endl; - l->pop(1); - l->print(); cout << endl; - - delete l; - return 0; -} |