title: Floating point exception on a int Array - C
body: <pre><code>int check_row;
      for (n=0; n&lt;9; n++) {
   used_numbers[n] = n+1;
  }
  for (row=0; row&lt;3; row++) {
      for (check_row=0; check_row&lt;3; check_row++) {
          used_numbers[(sudoku[row][check_row]-1)] = 0;
      }
  ...
  </code></pre>
  
  <p>int sudoku[9][9] declared as global variable and used_numbers[9] as int.
  In sudoku matrix for row from 0 to 2 and col from 0 to 2 for each row, has in it, numbers > 0</p>
  
  <p>At this point I get "Floating point exception", how resolve this?
  sorry for my bad english...</p>