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#pragma once
template <class T>
class Array {
T* arr;
unsigned size;
unsigned allocated;
void resize();
void free();
void copyFrom(const Array& other);
public:
Array();
~Array();
Array(const Array& other);
Array& operator=(const Array& other);
Array(Array&& other);
Array& operator=(Array&& other);
T& operator[](unsigned index);
T& operator[](unsigned index) const;
Array<T>& operator+=(const Array<T>& right);
template <class U>
friend bool operator==(const Array<U>& left, const Array<U>& right);
template <class U>
friend bool operator!=(const Array<U>& left, const Array<U>& right);
template <class U>
friend Array<U> operator+(const Array<U>& left, const Array<U>& right);
};
template <class T>
void Array<T>::resize() {
allocated *= 2;
T* biggerArr = new T[allocated];
for (int i = 0; i < size; i++) {
biggerArr[i] = arr[i];
}
delete[] arr;
arr = biggerArr;
}
template <class T>
void Array<T>::free() {
delete[] arr;
}
template <class T>
void Array<T>::copyFrom(const Array& other) {
this->size = other.size;
this->allocated = other.allocated;
this->arr = new T[allocated];
for (int i = 0; i < size; i++) {
this->arr[i] = other.arr[i];
}
}
template <class T>
Array<T>::Array() {
this->arr = nullptr;
allocated = size = 0;
}
template <class T>
Array<T>::~Array() {
free();
}
template <class T>
Array<T>::Array(const Array<T>& other) {
copyFrom(other);
}
template <class T>
Array<T>& Array<T>::operator=(const Array<T>& other) {
if (this != &other) {
free();
copyFrom(other);
}
return *this;
}
template <class T>
Array<T>::Array(Array<T>&& other) {
this->arr = other.arr;
other.arr = nullptr;
}
template <class T>
Array<T>& Array<T>::operator=(Array<T>&& other) {
if (this != &other) {
free();
this->arr = other.arr;
other.arr = nullptr;
}
return *this;
}
template <class T>
T& Array<T>::operator[](unsigned index) {
return arr[index];
}
template <class T>
T& Array<T>::operator[](unsigned index) const {
return arr[index];
}
template <class T>
Array<T>& Array<T>::operator+=(const Array<T>& right) {
for (int i = 0; i < right.size; i++) {
if (size == allocated) {
resize();
}
arr[size++] = right[i];
}
}
template <class T>
bool operator==(const Array<T>& left, const Array<T>& right) {
if (left.size != right.size) {
return false;
}
for (int i = 0; i < left.size; i++) {
if (left.arr[i] != right.arr[i]) {
return false;
}
}
return true;
}
template <class T>
bool operator!=(const Array<T>& left, const Array<T>& right) {
return !(left == right);
}
template <class T>
Array<T> operator+(const Array<T>& left, const Array<T>& right) {
Array<T> concat;
concat += left;
concat += right;
return concat;
}
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