RkNfer - set a reading itself as the current candidate

RkNfer sets a reading itself as the current candidate.

RkNfer - set a reading itself as the current candidate

       If successful, this function moves the current candidate in the context and returns the current candidate
       number  after the move.  It returns 0, without doing anything, if it has been run in a nonconversion mode
       context.

                                                                                                       RKNFER(3)

#include<canna/RK.h>intRkNfer(cxnum)intcxnum;