SDL tutorial 12

//http://www.youtube.com/user/thecplusplusguy
//Thanks for the typed in code to Tapit85
//you need tempmusic.wav tempmusic1.wav tempmusic2.wav file in the same folder
#include <SDL/SDL.h>
#include <SDL/SDL_mixer.h>

int main(int argc, char** argv)
{
    SDL_Init(SDL_INIT_EVERYTHING);
    SDL_Surface *screen;
    Mix_Chunk* effect1;
    Mix_Chunk* effect2;
    Mix_Music* music;
    Mix_OpenAudio(22050,MIX_DEFAULT_FORMAT,2,4096);
    music = Mix_LoadMUS("tempmusic.wav");
    effect1 = Mix_LoadWAV("tempsound1.wav");
    effect2 = Mix_LoadWAV("tempsound2.wav");
    Mix_PlayMusic(music, -1);
    screen = SDL_SetVideoMode(640, 480, 32, SDL_SWSURFACE);
    bool running = true;
    const int FPS = 30;
    Uint32 start;
    bool b[4] = {0,0,0,0};
    SDL_Rect rect;
    rect.x = 10;
    rect.y = 10;
    rect.w = 20;
    rect.h = 20;
    Uint32 color2 = SDL_MapRGB(screen->format, 0xff,0xff,0xff);
    Uint32 color = SDL_MapRGB(screen->format, 0,0,0);
    while(running) {
        start = SDL_GetTicks();
        SDL_Event event;
        while(SDL_PollEvent(&event)) {
            switch(event.type) {
                case SDL_QUIT:
                    running = false;
                    break;
                case SDL_KEYDOWN:
                    switch(event.key.keysym.sym) {
                        case SDLK_UP:
                            b[0] = 1;
                            break;
                        case SDLK_LEFT:
                            b[1] = 1;
                            break;
                        case SDLK_DOWN:
                            b[2] = 1;
                            break;
                        case SDLK_RIGHT:
                            b[3] = 1;
                            break;
                        case SDLK_1:
                            Mix_PlayChannel(-1,effect1,0);
                            break;
                        case SDLK_2:
                            Mix_PlayChannel(-1,effect2,0);
                            break;
                    }
                    break;
                case SDL_KEYUP:
                    switch(event.key.keysym.sym) {
                        case SDLK_UP:
                            b[0] = 0;
                            break;
                        case SDLK_LEFT:
                            b[1] = 0;
                            break;
                        case SDLK_DOWN:
                            b[2] = 0;
                            break;
                        case SDLK_RIGHT:
                            b[3] = 0;
                            break;

                    }
                    break;
            }
        }

        SDL_FillRect(screen, &rect, color);

        //logic
        if(b[0])
            rect.y--;
        if(b[1])
            rect.x--;
        if(b[2])
            rect.y++;
        if(b[3])
            rect.x++;

        //render
        SDL_FillRect(screen, &rect, color2);
        SDL_Flip(screen);

        if(1000/FPS > SDL_GetTicks()-start) {
            SDL_Delay(1000/FPS-(SDL_GetTicks()-start));
        }
    }
    Mix_FreeChunk(effect1);
    Mix_FreeChunk(effect2);
    Mix_FreeMusic(music);
    Mix_CloseAudio();
    SDL_Quit();
    return 0;
}