c++ - Using object outside class -

i'm trying create classes containing textures&sprites using sfml. when create object of class in sfml library in class - cannot use object in main. wonder how display sprite in main (e.g.):

class mainmenu {    public:       int drawmenu(){          sf::texture texture;          if (!texture.loadfromfile("idle.png"))             return exit_failure;          sf::sprite spritemenu(texture);          return 0;       }  };  int main() {    // create main window    sf::renderwindow app(sf::videomode(800, 600), "sfml window");     // load sprite display    sf::texture texture;    if (!texture.loadfromfile("cb.bmp"))       return exit_failure;    sf::sprite sprite(texture);     mainmenu menu;    // start game loop    while (app.isopen())    {       // process events       sf::event event;       while (app.pollevent(event))       {          // close window : exit          if (event.type == sf::event::closed)             app.close();       }        // clear screen       app.clear();        // draw sprite       app.draw(sprite);        menu.drawmenu();       app.draw(spritemenu);        // update window       app.display();    }     return exit_success; } 

your drawmenu function name lying. doesn't draw anything. loads texture , sprite.

drawmenu should draw menu sprite:

void drawmenu(sf::renderwindow& window) { // window = draw menu    window.draw(spritemenu); } 

now load spritemenu? stays same through lifetime of mainmenu, should naturally instantiated in constructor of mainmenu:

class mainmenu {    public:       mainmenu() {          if (!texture.loadfromfile("cb.bmp"))             abort(); // or throw exception          spritemenu.settexture(texture); // "initialize" spritemenu texture       }    …    private:       sf::texture texture;   // store these member data,       sf::sprite spritemenu; // kept alive through lifetime of mainmenu. }; 

now when mainmenu menu; texture , sprite initialized once, , not every time call draw function.

and when need draw menu, call menu.drawmenu(app); instead of menu.drawmenu(); app.draw(spritemenu);.