question: stop timer concode_field_sep boolean running concode_elem_sep double total concode_elem_sep double last_time concode_field_sep void resume concode_elem_sep double seconds concode_elem_sep double read concode_elem_sep void start concode_elem_sep void reset
target: double function ( ) { if ( running ) { total += seconds ( ) - last_time ; running = false ; } return total ; }