SDL displaying .bmp

I am learning SDL from a tutorial on youtube and one lesson is displaying bitmaps, I types in the code in code::blocks but it only displays the image when I am about to close it.

Here is my code.

Code:

#include <SDL/SDL.h>

SDL_Surface *buffer = 0;
SDL_Surface *bitmap = 0;

int main(int argc, char *argv[]){
    SDL_Init(SDL_INIT_VIDEO);
    buffer = SDL_SetVideoMode(640, 480, 32, SDL_SWSURFACE);

    bool run = true;
    SDL_Event event;

    bitmap = SDL_LoadBMP("smile.bmp");

    if(bitmap == 0){
        return -1;
    }

    SDL_Rect pos;
    pos.x = 0;
    pos.y = 0;

    while(run){
        while(SDL_PollEvent(&event)){
            if(event.type == SDL_QUIT)
            {
                run = false;
            }
        }
    }

    SDL_BlitSurface(bitmap, 0, buffer, &pos);
    SDL_Flip(buffer);

    SDL_Quit();
    return(0);
}

SDL_BlitSurface(bitmap, 0, buffer, &pos);
SDL_Flip(buffer);

Move these before your loop?

Thanks!