--->main.cpp<---

#include <iostream>
#include "display.h"

int main(){
    Display display(800, 600, "Hello World!");
    return 0;
}

--->display.h<---

#ifndef DISPLAY_H
#define DISPLAY_H

#include <string>

class Display{
    public:
        Display(int width, int height, const std::string& title);
        virtual ~Display();
    protected:
    private:
        Display(const Display& other) {}
        Display& operator=(const Display& other) {}
};

#endif // DISPLAY_H

-->display.cpp<--

#include "display.h"
#include <iostream>

Display::Display(int width, int height, const std::string& title){
    std::cout << "Constructor!" << std::endl;
}

Display::~Display(){
    std::cout << "Destructor!" << std::endl;
}