Saving map to binary file.

Hello,
As a projekt in my school we are supposed to create a game, and my job was to make a map maker.
Ive got the mapmaker working, but i cant seem to save the map into a binary file.

We are using SDL,OpenGl and C.
The map is divided in a 30*30 "tile field" and my idea i to write all tiles to a binary like this:

Code:

                    utfil=fopen("test.dat","wb");
                      for(i=0;i<MAP_WIDTH;i++)
                        for(u=0;u<MAP_HEIGHT;u++)
                     {
                        fwrite(&map[i][u].background,sizeof(int),1,infil);
                        fwrite(&map[i][u].walkable,sizeof(int),1,infil);
                        fwrite(&map[i][u].decoration,sizeof(int),1,infil);
                      }

And then load it in the same way, i just chnage fwrite to fread like so:

Code:

                    infil=fopen("test.dat","rb");
                      for(i=0;i<MAP_WIDTH;i++)
                        for(u=0;u<MAP_HEIGHT;u++)
                      {
                        fread(&map[i][u].background,sizeof(int),1,infil);
                        fread(&map[i][u].walkable,sizeof(int),1,infil);
                        fread(&map[i][u].decoration,sizeof(int),1,infil);
                       }
                    fclose(infil);

The struct im using for the map looks líke this:

Code:

struct Tile
{
    int background;
    int walkable;
    int decoration;
};

I've been stuck at this for maaany hours now, and im geeting tired of it. Been googling alot, but found nothing that worked.
Does any of your brilliant minds have a solution?

If u need more of my code please let me know.

Best Regards

You use the variable utfile in your code snippet for writing, but you fwrite to infil. Is this a copy/paste error in your post, or perhaps the source of your problem?

If it is a copy/paste error and your actual code uses the correct variable names, then can you be a little more specific about what is not working? Is no file showing up named test.dat? Are you getting a compile error? Seg-fault when trying to load from the file? etc.

That is indeed just a copy/paste error, i write to utfil and read to infil.

It does create a file, but it seems only to be filled with blanks(spaces), so I cant anything from it.

Edit: I've managed to solve the problem
Ty for your help