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| #include <iostream>
#include <windows.h>
#include <iomanip>
#include <cstring>
#include <algorithm>
using namespace std;
template <typename T>
class List
{
public:
//Длина списка
int GetSize() { return Size; }
//Очистить список
void clear();
//Добавить элемент в начало списка
void push_front(T data);
//Добавить элемент в конец списка
void push_back(T data);
//Удалить элемент из начала списка
void pop_front();
//Удалить элемент из конца списка
void pop_back();
//Добавить элемент по указанному индексу
void insert(T data, int index);
//Удалить элемент по указанному индексу
void removeAt(int index);
T& operator [] (const int index);
//Вывести список на экран
void ShowData();
//Сортировка
void sort();
List <T>();
~List <T>();
private:
template <typename T>
class Node
{
public:
Node(T data = T(), Node* pNext = nullptr, Node* pPrev = nullptr)
{
this->data = data;
this->pNext = pNext;
this->pPrev = pPrev;
}
T data;
Node* pNext;
Node* pPrev;
};
Node <T>* head;
Node <T>* tail;
int Size;
};
List <int> lst;
template <typename T> List <T>::List()
{
head = nullptr;
tail = nullptr;
Size = 0;
}
template <typename T> List <T>::~List()
{
clear();
}
template<typename T>
void List<T>::clear()
{
while (Size)
{
pop_front();
}
}
template <typename T>
void List <T>::push_front(T data)
{
if (Size > 1)
{
Node <T>* temp = head;
head = new Node <T>(data, head);
temp->pPrev = head;
}
else if (Size == 1)
{
head = new Node <T>(data, head);
tail->pPrev = this->head;
}
else
{
head = tail = new Node <T>(data, head, tail);
}
Size++;
}
template <typename T>
void List <T>::push_back(T data)
{
if (Size > 1)
{
Node <T>* temp = tail;
tail = new Node <T>(data, nullptr, tail);
temp->pNext = tail;
}
else if (Size == 1)
{
tail = new Node <T>(data, nullptr, tail);
head->pNext = this->tail;
}
else
{
head = tail = new Node <T>(data, head, tail);
}
Size++;
}
template <typename T>
void List <T>::pop_front()
{
if (Size > 1)
{
Node <T>* temp = head;
head = head->pNext;
delete temp;
}
else if (Size == 1)
{
Node <T>* temp = head;
tail = head = head->pNext;
delete temp;
}
Size--;
}
template <typename T>
void List <T>::pop_back()
{
if (Size > 1)
{
Node <T>* temp = tail;
tail = tail->pPrev;
delete temp;
}
else if (Size == 1)
{
Node <T>* temp = tail;
tail = head = tail->pPrev;
delete temp;
}
Size--;
}
template <typename T>
void List <T>::insert(T data, int index)
{
if (index == 0) push_front(data);
else if (index == Size || index > Size) push_back(data);
else if (index <= Size / 2)
{
Node<T>* previous = this->head;
for (int i = 0; i < index - 1; i++)
{
previous = previous->pNext;
}
Node<T>* newNode = new Node<T>(data, previous->pNext, previous);
previous->pNext = newNode;
Node<T>* next = newNode->pNext;
next->pPrev = newNode;
Size++;
}
else if (index > Size / 2)
{
Node<T>* next = this->tail;
for (int i = Size - 1; index < i; i--)
{
next = next->pPrev;
}
Node<T>* newNode = new Node<T>(data, next, next->pPrev);
next->pPrev = newNode;
Node<T>* previous = newNode->pPrev;
previous->pNext = newNode;
Size++;
}
}
template <typename T>
void List <T>::removeAt(int index)
{
if (index == 0) pop_front();
else if (index == Size || index > Size) pop_back();
else if (index <= Size / 2)
{
Node<T>* previous = this->head;
for (int i = 0; i < index - 1; i++)
{
previous = previous->pNext;
}
Node<T>* toDelete = previous->pNext;
previous->pNext = toDelete->pNext;
Node<T>* next = toDelete->pNext;
delete toDelete;
next->pPrev = previous;
Size--;
}
else if (index > Size / 2)
{
Node<T>* next = this->tail;
for (int i = Size - 1; index < i; i--)
{
next = next->pPrev;
}
Node<T>* toDelete = next->pPrev;
next->pPrev = toDelete->pPrev;
Node<T>* previous = toDelete->pPrev;
delete toDelete;
previous->pNext = next;
Size--;
}
}
template <typename T>
T& List <T>::operator[] (const int index)
{
if (index <= Size / 2)
{
int counter = 0;
Node <T>* current = this->head;
while (current != nullptr)
{
if (counter == index) return current->data;
current = current->pNext;
counter++;
}
}
else
{
int counter = Size - 1;
Node <T>* current = this->tail;
while (current != nullptr)
{
if (counter == index) return current->data;
current = current->pPrev;
counter--;
}
}
}
template <typename T>
void List <T>::ShowData()
{
std::cout << "Список:" << std::endl;
std::cout << '\n';
for (size_t i = 0; i < lst.GetSize(); i++) {
std::cout <<lst[i]<< '|';
}
std::cout << '\n';
std::cout << '\n';
}
template <typename T>
void List <T>::sort()
{
Node <T>* left = head;
Node <T>* right = head->pNext;
Node <T>* temp = new Node<T>;
while (left->pNext) {
while (right) {
for (size_t i = 0; i < lst.GetSize(); i++) {
if ((left->lst[i]) < (right->lst[i])) {
temp->lst[i] = left->lst[i];
left->lst[i] = right->lst[i];
right->lst[i] = temp->lst[i];
}
right = right->pNext;
}
}
left = left->pNext;
right = left->pNext;
}
}
int main()
{
SetConsoleOutputCP(1251);
SetConsoleCP(1251);
int n;
for (int i = 0; i < 10; i++)
{
n = rand() % 99;
lst.push_back(n);
}
while (true) {
int variant;
std::cout << "Выберите вариант \n" << std::endl;
std::cout << "1. Добавить элемент \n"
<< "2. Изменить элемент \n"
<< "3. Удалить элемент \n"
<< std::endl;
std::cout << ">>> ";
std::cin >> variant;
switch (variant) {
case 1:
{
int N;
int M;
std::cout << "Добавить число: ";
std::cin >> M;
std::cout << "\n";
std::cout << "Куда вставить: ";
std::cin >> N;
lst.insert(M, N);
break;
}
case 2:
{
int N;
int M;
std::cout << "Какое число изменить: ";
std::cin >> N;
std::cout << "\n";
std::cout << "На какое число изменить: ";
std::cin >> M;
lst.removeAt(N);
lst.insert(M, N);
break;
}
case 3:
{
int N;
std::cout << "\n";
std::cout << "Удалить число: ";
std::cin >> N;
lst.removeAt(N);
break;
}
case 4:
{
int N;
lst.sort();
lst.ShowData();
break;
}
case 5:
{
lst.ShowData();
break;
}
}
}
return 0;
} |
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