c++ - Surface dissapears when I use SDL_RECT -


im trying create class contains info of game's ship (image , position @ moment), compiles expected if use sdl_rect variable created inside ship argument in sdl_blitsurface method, ship not appear.

here's code:

main.cpp

int main() {     init();     ship ship;     ship.alive();     background bg;     sdl_blitsurface(bg.bg,null,screen,null);     printf("%i",ship.rect.y);     sdl_blitsurface(ship.img,&ship.rect,screen,null);     sdl_updatewindowsurface(window);     sdl_delay(5000);     return 0; }

ship.cpp

ship::ship(){     std::string path = "img/arwing2.png";     x = 50;     y = 50;     rect.x = x;     rect.y = y;     rect.w = 300;     rect.y = 300;     img = img_load(path.c_str());     if(img == null){         printf("unable load image");     }     printf("hey!!"); }   void ship::alive(){     printf("i'm alive!"); }

any idea of i'm doing wrong? want enter image description here

this gete

in code, have provided source rect.

this means cutting image show pixels (x,y) inside image , extending (w,h).

what wanted provide destination rect tell sdl_blitsurface draw it, i.e. (x,y) inside screen. follows:

sdl_blitsurface(ship.img, null, screen, &ship.rect);                           ^(src)        ^(dest)

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