---
name: "relprodbddnodeassoc"
section: "3"
platform: "linux"
package: "alliance"
version: "5.1.1-3"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/relprodbddnodeassoc"
---

# relprodbddnodeassoc(3)

computes a relational product.

## NAME

relprodbddnodeassoc - computes a relational product.

## SYNOPSYS

```
#include "bdd101.h"
bddnode ∗relprodbddnodeassoc( BddSystem, BddNode1, BddNode2, BddAssoc )
  bddsystem ∗BddSystem;
  bddnode   ∗BddNode1;
  bddnode   ∗BddNode2;
  bddassoc  ∗BddAssoc;
```

## PARAMETERS

- *BddSystem*

  The **bdd** system.

- *BddNode1*

  The first **bdd** node.

- *BddNode2*

  The second **bdd** node.

- *BddAssoc*

  The variable association.

## DESCRIPTION

**relprodbddnodeassoc** computes *BddNode1* AND *BddNode2*, and suppress the variables associated with something in the variable association *BddAssoc*, in the **bdd** system *BddSystem*. If a null pointer is given, the default **bdd** system is used.\

## RETURN VALUE

**relprodbddnodeassoc** returns the computed **bdd** node.

## ERRORS

**"bad variable association xxx, error !"**

The *BddAssoc* parameter must a valid variable association.

## EXAMPLE

```
#include "bdd101.h"
   bddsystem  ∗BddSystem;
   bddcircuit ∗BddCircuit;
   bddnode    ∗BddNode;
   bddnode    ∗BddNode1;
   bddnode    ∗BddNode2;
   bddnode    ∗BddVariable;
   bddassoc   ∗Assoc;
   chain_list ∗Expr;
   bddvar         Variable;
   BddSystem  = createbddsystem( 100, 1000, 100, 50000 );
   BddCircuit = createbddcircuit( "hello_world", 10, 10, BddSystem );
   Expr = createablbinexpr( ABL_AND,
                            createablatom( "i0" ),
                            createablatom( "i1" ) );
   BddNode1 = addbddcircuitabl( BddCircuit, Expr );
   freeablexpr( Expr );
   Expr = createablbinexpr( ABL_OR,
                            createablatom( "i0" ),
                            createablatom( "i1" ) );
   BddNode2 = addbddcircuitabl( BddCircuit, Expr );
   freeablexpr( Expr );
   BddVariable = searchbddcircuitin( (bddcircuit ∗)0, "i0" );
   Variable = getbddvarbyindex( (bddsystem ∗)0, BddVariable->INDEX );
   Assoc = addbddassoc( (bddsystem ∗)0 );
   addbddnodeassoc( (bddsystem ∗)0, Assoc, Variable, BddSystem->ONE );
   BddNode = relprodbddnodeassoc( (bddsystem ∗)0, BddNode1, BddNode2, Assoc );
   Expr = convertbddcircuitabl( BddCircuit, BddNode );
   /* displays i1 */
   viewablexpr( Expr, ABL_VIEW_VHDL );
   freeablexpr( Expr );
   destroybddassoc( (bddsystem ∗)0 );
   destroybddsystem( (bddsystem ∗)0 );
   destroybddcircuit( (bddcircuit ∗)0 );
```

## SEE ALSO

[**bdd**(1)](/bdd/1.md)