#define _CRT_SECURE_NO_WARNINGS

#include <iostream>

using namespace std;

class String {

public:

    String() : size_(0), capacity_(15), str_(new char[capacity_]) {}

    explicit String(const int string_capacity) : size_(0), capacity_(string_capacity), str_(new char[capacity_]) {}

    String(const char* new_string) : size_(strlen(new_string)), capacity_(size_ + 1), str_(new char[capacity_]) {
        strcpy(str_, new_string);
    }

    String(const String& other) : size_(other.size_), capacity_(other.capacity_), str_(new char[capacity_]) {
        strcpy(str_, other.str_);
    }

    String(String&& other) : size_(other.size_), capacity_(other.capacity_), str_(other.str_) {
        other.str_ = nullptr;
        other.size_ = 0;
        other.capacity_ = 0;
    }

    String& operator=(const String& other) {
        if (&other != this) {
            size_ = other.size_;
            capacity_ = other.capacity_;
            delete[] str_;
            str_ = new char[capacity_];
            strcpy(str_, other.str_);
        }
        return *this;
    }

String& operator=(String&& other) {
        if (&other != this) {
            size_ = other.size_;
            capacity_ = other.capacity_;
            delete[] str_;
            str_ = other.str_;
            other.str_ = nullptr;
            other.size_ = 0;
            other.capacity_ = 0;
        }
        return *this;
    }

    String& operator=(const char* new_string) {
        int new_space = strlen(new_string) + 1;
        if (capacity_ < new_space) {
            delete[] str_;
            capacity_ = new_space;
            str_ = new char[capacity_];
        }
        strcpy(str_, new_string);
        size_ = capacity_ - 1;
        return *this;
    }

    char& operator[](const int index) {
        if (index < 0 || index >= size_) {
            cout << "Некорректный индекс" << endl;
        }
        return str_[index];
    }

    const char& operator[](const int index) const {
        if (index < 0 || index >= size_) {
            cout << "Некорректный индекс" << endl;
        }
        return str_[index];
    }

    bool operator==(const String& other) const {
        return strcmp(str_, other.str_) == 0;
    }

    bool operator!=(const String& other) const {
        return strcmp(str_, other.str_) != 0;
    }

    int size() const {
        return size_;
    }

    int capacity() const {
        return capacity_;
    }

    ~String() {
        delete[] str_;
    }

    friend ostream& operator<<(ostream& output, const String& str);

private:
    int size_;
    int capacity_;
    char* str_;
};


ostream& operator<<(ostream& output, const String& str) {
    output << str.str_;
    return output;
}

istream& operator>>(istream& input, String& str) {
    int capacity = 15;
    int i = 0;
    char* new_str = new char[capacity];
    char ch;

    while (ch = input.get()) {
        if (ch == ' ' || ch == '\n') {
            break;
        }
        if (i == capacity - 1) {
            char* temp = new char[capacity *= 2];
            strcpy(temp, new_str);
            delete[] new_str;
            new_str = temp;
        }
        new_str[i++] = ch;
    }
    new_str[i] = '\0';
    str = new_str;
    delete[] new_str;
    return input;
}

int main() {
    setlocale(LC_ALL, "ru");

    String str1;

    String str2(30);

    String str3("Привет");

    cout << str3 << endl;

    str3= "Новая строка";

    cout << str3 << endl;

    str1 = "Еще одна новая строка";

    cout << str1 << endl;

    String str4(str3);

    cout << str4 << endl;

    str4 = str1;

    cout << str1 << endl;

    cout << str4 << endl;

    str4[5] = 'н';

    cout << str4 << endl;

    cout << (str3 == str4) << endl;

    cout << (str3 != str4) << endl;
}