Generated on Mon Aug 27 2012 17:15:56 for Gecode by doxygen 1.8.1.2
Sat Class Reference

Example: CNF SAT solver More...

Public Member Functions

 Sat (const SatOptions &opt)
 The actual problem.
 Sat (bool share, Sat &s)
 Constructor for cloning.
virtual Spacecopy (bool share)
 Perform copying during cloning.
virtual void print (std::ostream &os) const
 Print solution.
void parseDIMACS (const char *f)
 Post constraints according to DIMACS file f.
- Public Member Functions inherited from Gecode::Driver::ScriptBase< BaseSpace >
 ScriptBase (void)
 Default constructor.
 ScriptBase (bool share, ScriptBase &e)
 Constructor used for cloning.
virtual void compare (const Space &, std::ostream &os) const
 Compare with s.

Additional Inherited Members

- Static Public Member Functions inherited from Gecode::Driver::ScriptBase< BaseSpace >
template<class Script , template< class > class Engine, class Options >
static void run (const Options &opt)

Detailed Description

Example: CNF SAT solver

SAT finds assignments of Boolean variables such that a set of clauses is satisfied or shows that no such assignment exists.

This example parses a dimacs CNF file in which the constraints are specified. For each line of the file a clause propagator is posted.

Format of dimacs CNF files:

A dimacs file starts with comments (each line starts with c). The number of variables and the number of clauses is defined by the line

p cnf <variables> <clauses>

Each of the subsequent lines specifies a clause. A positive literal is denoted by a positive integer, a negative literal is denoted by the corresponding negative integer. Each line is terminated by 0.

c sample CNF file p cnf 3 2 3 -1 0 1 2 -1 0

Benchmarks on satlib.org, for instance, are in the dimacs CNF format.

Definition at line 115 of file sat.cpp.

Constructor & Destructor Documentation

Sat::Sat ( const SatOptions opt)
inline

The actual problem.

Definition at line 121 of file sat.cpp.

Sat::Sat ( bool  share,
Sat s 
)
inline

Constructor for cloning.

Definition at line 127 of file sat.cpp.

Member Function Documentation

virtual Space* Sat::copy ( bool  share)
inlinevirtual

Perform copying during cloning.

Definition at line 133 of file sat.cpp.

virtual void Sat::print ( std::ostream &  os) const
inlinevirtual

Print solution.

Reimplemented from Gecode::Driver::ScriptBase< BaseSpace >.

Definition at line 139 of file sat.cpp.

void Sat::parseDIMACS ( const char *  f)
inline

Post constraints according to DIMACS file f.

Definition at line 144 of file sat.cpp.


The documentation for this class was generated from the following file: