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ooplab3.cpp
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ooplab3.cpp
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#include <cstdlib>
#include <cassert>
#include <iostream>
#include <algorithm>
#include <iterator>
class iterator {
public:
using iterator_category = std::bidirectional_iterator_tag;
using value_type = int;
using difference_type = std::ptrdiff_t;
using pointer = int*;
using reference = int&;
iterator(pointer ptr = nullptr) : m_ptr(ptr) {}
reference operator*() const { return *m_ptr; }
pointer operator->() { return m_ptr; }
iterator& operator++() {
++m_ptr;
return *this;
}
iterator operator++(int) {
iterator temp = *this;
++(*this);
return temp;
}
iterator& operator--() {
--m_ptr;
return *this;
}
iterator operator--(int) {
iterator temp = *this;
--(*this);
return temp;
}
friend bool operator==(const iterator& a, const iterator& b) { return a.m_ptr == b.m_ptr; }
friend bool operator!=(const iterator& a, const iterator& b) { return a.m_ptr != b.m_ptr; }
private:
pointer m_ptr;
};
class reverse_iterator {
public:
using iterator_category = std::bidirectional_iterator_tag;
using value_type = int;
using difference_type = std::ptrdiff_t;
using pointer = int*;
using reference = int&;
reverse_iterator(pointer ptr = nullptr) : m_ptr(ptr) {}
reference operator*() const { return *m_ptr; }
pointer operator->() { return m_ptr; }
reverse_iterator& operator++() {
--m_ptr;
return *this;
}
reverse_iterator operator++(int) {
reverse_iterator temp = *this;
--(*this);
return temp;
}
reverse_iterator& operator--() {
++m_ptr;
return *this;
}
reverse_iterator operator--(int) {
reverse_iterator temp = *this;
++(*this);
return temp;
}
friend bool operator==(const reverse_iterator& a, const reverse_iterator& b) { return a.m_ptr == b.m_ptr; }
friend bool operator!=(const reverse_iterator& a, const reverse_iterator& b) { return a.m_ptr != b.m_ptr; }
private:
pointer m_ptr;
};
class abstract_data_t {
public:
abstract_data_t() : data(nullptr), size(0), capacity(0) {}
abstract_data_t(size_t size) : data(new int[size]), size(size), capacity(size) {
std::fill(data, data + size, 0);
}
abstract_data_t(const int arr[], size_t size) : data(new int[size]), size(size), capacity(size) {
std::copy(arr, arr + size, data);
}
abstract_data_t(const abstract_data_t& other) : data(new int[other.capacity]), size(other.size), capacity(other.capacity) {
std::copy(other.data, other.data + size, data);
}
abstract_data_t(iterator first, iterator last) {
ptrdiff_t dist = std::distance(first, last);
if (dist < 0) {
throw std::invalid_argument("Недопустимый диапазон итераторов");
}
size = static_cast<size_t>(dist);
capacity = size;
data = new int[size];
int* temp = new int[size];
std::copy(first, last, temp);
std::copy(temp, temp + size, data);
delete[] temp;
}
abstract_data_t(reverse_iterator first, reverse_iterator last) {
ptrdiff_t dist = std::distance(first, last);
if (dist < 0) {
throw std::invalid_argument("Недопустимый диапазон обратных итераторов");
}
size = static_cast<size_t>(dist);
capacity = size;
data = new int[size];
int* temp = new int[size];
reverse_iterator temp_it = last;
for (size_t i = 0; i < size; ++i) {
--temp_it;
temp[i] = *temp_it;
}
std::copy(temp, temp + size, data);
delete[] temp;
}
~abstract_data_t() {
clear();
}
void clear() {
delete[] data;
data = nullptr;
size = 0;
capacity = 0;
}
int at(int index) const {
if (index < 0 || index >= static_cast<int>(size)) {
throw std::out_of_range("Индекс выходит за пределы допустимого диапазона");
}
return data[index];
}
void resize(size_t newSize) {
if (newSize > capacity) {
reallocate(newSize);
}
if (newSize < size) {
size = newSize;
}
else if (newSize > size) {
std::fill(data + size, data + newSize, 0);
}
size = newSize;
}
void assign(size_t num, int value) {
clear();
size = num;
capacity = num;
data = new int[num];
std::fill(data, data + num, value);
}
void assign(iterator first, iterator last) {
clear();
ptrdiff_t dist = std::distance(first, last);
if (dist < 0) {
throw std::invalid_argument("Недопустимый диапазон итераторов");
}
size = static_cast<size_t>(dist);
capacity = size;
data = new int[size];
std::copy(first, last, data);
}
size_t length() const {
return size;
}
bool empty() const {
return size == 0;
}
void swap(abstract_data_t& other) {
std::swap(data, other.data);
std::swap(size, other.size);
std::swap(capacity, other.capacity);
}
static bool is_equal(const abstract_data_t& a, const abstract_data_t& b) {
return a.size == b.size && std::equal(a.data, a.data + a.size, b.data);
}
iterator begin() const {
return iterator(data);
}
iterator end() const {
return iterator(data + size);
}
reverse_iterator rbegin() const {
return reverse_iterator(data + size - 1);
}
reverse_iterator rend() const {
return reverse_iterator(data - 1);
}
private:
int* data;
size_t size;
size_t capacity;
void reallocate(size_t newCapacity) {
int* newData = new int[newCapacity];
std::copy(data, data + size, newData);
delete[] data;
data = newData;
capacity = newCapacity;
if (newCapacity > size) {
std::fill(data + size, data + newCapacity, 0);
}
}
};
int main(int argc, char const* argv[])
{
int array[] = { 19, 47, 74, 91 };
abstract_data_t a(array, 4);
for (auto it = a.begin(); it != a.end(); ++it) std::cout << *it << " ";
abstract_data_t b(a.begin(), a.end());
assert(abstract_data_t::is_equal(a, b));
for (auto&& it : b) std::cout << it << " ";
abstract_data_t c(b.begin(), b.end());
assert(std::equal(c.begin(), c.end(), b.begin()));
for (auto it = c.rbegin(); it != c.rend(); ++it) std::cout << *it << " ";
abstract_data_t d(c.rbegin(), c.rend());
for (auto it = d.rbegin(); it != d.rend(); ++it) std::cout << *it << " ";
return 0;
}