Question

On both for loops (ie: for(len… and for(wid… ), I receive the same error message:

error: expected ‘;’ before ‘)’ token

void
init(void)
{
    //fills board up with numbers
    int tile = (d*d - 1);
    int len = 0;
    int wid = 0;

    for(len < d; len++)
        {
            for(wid < d; wid++)
                {
                    board[len][wid] = tile;
                    tile--;
                }
        }
}

Sorry to ask a similar question as before, but I’m a very confused Newbie!

Answer 1

Every for-loop needs to have its 3 parts (initialization, test, update) and if you don’t have one or more of them, you still have to supply the two ;, so

for(len < d; len++)
    ^
    |

should really be

    |
    v
for(;len < d; len++)

and the same for the other for-loop in your function.

For instance, this is how you would set up an infinite loop using for:

for(;;)

where all parts are skipped, but the two semi-colons are still required.

Perhaps this is tutorial/reference on the for-loop is helpful as a review/reference.