NAME

       addbddvarfirst - adds a new variable, before all others.

SYNOPSYS

       #include "bdd101.h"
       bddnode ∗addbddvarfirst( BddSystem )
         bddsystem ∗BddSystem;

PARAMETERS

       BddSystem           The bdd system.

DESCRIPTION

       addbddvarfirst creates a new variable, with the number 0, in the bdd system BddSystem.  If
       a null pointer is given, the default bdd system is used.

RETURN VALUE

       addbddvarfirst returns a pointer to the bdd node of the new variable.

ERRORS

       "no more variables, error !"
              There is no variable number left.

EXAMPLE

       #include "bdd101.h"
          bddsystem  ∗BddSystem;
          bddnode    ∗BddNode;
          BddSystem  = createbddsystem( 100, 1000, 100, 50000 );
          BddNode = addbddvarfirst( (bddsystem ∗)0 );
          destroybddsystem( (bddsystem ∗)0 );

SEE ALSO

       bdd(1)