illegal copy constructor required?

I'm working on a recursive function that has a class as an argument:

Code:

board_t solve(board_t board, int x, int *rowtarget, int* coltarget) {
  int i;
  board_t temp = board;
  for (i = 0; i < board.size; ++i) {
    temp.board[x][i] = true;
    if (ok(temp,rowtarget,coltarget)) {
      if (x < board.size - 1)
        return solve(temp,x+1,rowtarget,coltarget);
      else
        return temp;
    }
    temp = board;
  }
  printf("no solutions found!\n");
  return board;
}

so I implemented a copy constructor and operator= for the class. Now when I compile my code I get the following error on the line where the recursive function calls itself:

error: no matching function for call to `board_t::board_t(board_t)'
board.h:9: note: candidates are: board_t::board_t(board_t&)
board.h:8: note: board_t::board_t(int)

I tried just making a duplicate of my copy constructor like that, but it gave me wicked errors. I'm not sure what's causing this, but I've tried everything I can think of and nothing works.

Have you overloaded the = operator in your class cause if not you can't just assign the class to another class which is probably the cause of the problem.