#include <iostream>


using namespace std;


class String {

public:

    String() {
        size_ = 0;
        capacity_ = 15;
        str_ = new char[capacity_];
    }

    String(const int string_capacity) {
        size_ = 0;
        capacity_ = string_capacity;
        str_ = new char[capacity_];
    }

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

    void SetString(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* GetString() {
        return str_;
    }


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


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

    String str1;

    String str2(30);

    String str3("Hello");

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

    str3.SetString("New_str3");

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

    str1.SetString("New_str1");

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

}