then when you move you can do something bout like this.

if(map[playerx][playery].type=1)playerx = old.x,playery=old.y;

Hope this helps some if you need more info i can send you some examples.

typedef struct map{
char tile; //tile id(pic of tile to draw)
char type; // any flags for the tile.(up to 255)
}

map CurMap[200][200]; //array of struct map.

Now what you do for collision detection is like this
logic(){
int oldx = playerx;
int oldy = playery;
now
you do your movment checks like
if(key_up)playerx--;
and so on.
now after that we go
if(CurMap[playerx/tilesize][playery/tilesize].type = 1){playerx = oldx,playery=oldy;}

Hope this helps. You might have to add some stuff if your player sprite is bigger or smaller than your tile size.