#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& 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;
    }

    void set_string(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;
    }

    const char* get_string() {
        return str_;
    }

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

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

    int size() const {
        return size_;
    }

    int capacity() const {
        return capacity_;
    }

    ~String() {
        delete[] str_;
    }


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


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

    String str1;

    String str2(30);

    String str3("Привет");

    cout << str3.get_string() << endl;

    str3.set_string("Новая строка");

    cout << str3.get_string() << endl;

    str1.set_string("Еще одна новая строка");

    cout << str1.get_string() << endl;

    String str4(str3);

    cout << str4.get_string() << endl;

    str4 = str1;

    cout << str1.get_string() << endl;

    cout << str4.get_string() << endl;

}