Lab 2, Task 2

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cstring>

using namespace std;

class String {
private:
    char* st;
public:
    String(int);
    String(const char* s, int);
    void dislpay()const;
    void get();
    void operator=(String);
    String operator+(String) const;
    String operator+=(String);
    bool operator==(String);
    bool operator!=(String);
    String& operator[](int);
    String operator()(int, int);
};

String::String(int sz = 80) {
    st = new char[sz];
    st[0] = '\0';
}
String::String(const char* s, int sz = 80) {
    st = new char[sz];
    strcpy(st, s);
}
void String::dislpay()const {
    cout << "String: " << st << endl;
}
void String::get() {
    cout << "Напишите строку: ";
    cin >> st;
}
bool String::operator==(String s) {
    if (!strcmp(st, s.st))
        return true;
    else return false;
}
bool String::operator!=(String s)
{
    if(!strcmp(st, s.st))
        return false;
    return true;
}

void String::operator=(String s) {
    this->st = s.st;
}

String String::operator+(String s) const
{
    String temp;
    strcat(temp.st = this->st, s.st);
    return temp;
}

String String::operator+=(String s)
{
    return String(strcat(st, s.st));
}


int main() {
    setlocale(LC_ALL, "Russian");
    String st1 = "World!";
    String st2 = "Hello, ";
    st1.dislpay();
    st2.dislpay();


    String st3;
    st3 = st2 + st1;

    st3.dislpay();


    /*int a = 1, b = 2;
    if (a == b)
        cout << "lox";
    else cout << "ne lox";

    if (st1 == st2)
        cout << "Одинаковые" << endl;
    else cout << "Разные" << endl;*/
    return 0;
}