List handling

NAME

: init_list, insert_list, delete_list, empty_list, in_list -- List Hanling

SYNTAX

:

      init_list( LIST l )

      insert_list( int e, LIST l )

      delete_list( int e, LIST l )

      int empty_list( LIST l )

      int in_list( int e, LIST l )

DESCRIPTION

:

• init_list initialises list l to an empty list.
• insert_list inserts integer element e into list l. If e is already in list, l is left unchanged.
• delete_list deletes integer element e from list l.
• empty_list returns TRUE if list l is empty. Otherwise returns FALSE.
• in_list returns TRUE if integer element e is a member of list l. Otherwise returns FALSE.

DIAGNOSTICS

If $e > MAXMEMBERS$ an error message is printed and the execution is aborted. In delete_list if e is not a member of l a warning message is printed both to debug file and on the display.

RESTRICTIONS

These routines can create and handle a list of up to MAXMEMBERS integers. The minimum space of a bit is used per each member.

SEE ALSO List.h.