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Sat Class Reference
[Example scripts (models)]

Example: CNF SAT solver More...

List of all members.

Public Member Functions

 Sat (const SatOptions &opt)
 The actual problem.
 Sat (Sat &s)
 Constructor for cloning.
virtual Spacecopy (void)
 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.

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 111 of file sat.cpp.


Constructor & Destructor Documentation

Sat::Sat ( const SatOptions opt  )  [inline]

The actual problem.

Definition at line 117 of file sat.cpp.

Sat::Sat ( Sat s  )  [inline]

Constructor for cloning.

Definition at line 124 of file sat.cpp.


Member Function Documentation

virtual Space* Sat::copy ( void   )  [inline, virtual]

Perform copying during cloning.

Definition at line 130 of file sat.cpp.

virtual void Sat::print ( std::ostream &  os  )  const [inline, virtual]

Print solution.

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

Definition at line 136 of file sat.cpp.

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

Post constraints according to DIMACS file f.

Definition at line 141 of file sat.cpp.


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