bitstringsetterdemo.java

来自「Java版的SAT求解器」· Java 代码 · 共 54 行

package positronic.satisfiability.demos;
/**
 * <p>Title: TBS</p>
 * <p>Description: TBS</p>
 * <p>Copyright (c) 2005</p>
 * <p>Company: Positronic Software</p>
 * @author Kerry Michael Soileau
 * @version 1.0
 */
import java.util.ArrayList;
import java.util.List;

import positronic.satisfiability.bitstring.BitString;
import positronic.satisfiability.bitstring.BitStringSetter;
import positronic.satisfiability.bitstring.IBitString;
import positronic.satisfiability.elements.BitFixer;
import positronic.satisfiability.elements.BooleanLiteral;
import positronic.satisfiability.elements.BooleanVariable;
import positronic.satisfiability.elements.Conjunction;
import positronic.satisfiability.elements.IBooleanVariable;
import positronic.satisfiability.elements.IProblem;
import positronic.satisfiability.solutions.PartialSolution;

public class BitStringSetterDemo
{
  public static void main(String[] args) throws Exception
  {
    IBitString X=new BitString("X",new IBooleanVariable[3]);
    ArrayList pfix=new ArrayList();
    for(int row=0;row<X.size();row++)
    {
      boolean value=false;
      if(Math.random()<.5) value=true;
      X.setBooleanVariable(row,BooleanVariable.getBooleanVariable(X.getName()+"_"+row));
      pfix.add(new BitFixer(X.getBooleanVariable(row),value));
    }

    IBitString Y=new BitString("Y",new IBooleanVariable[3]);
    for(int row=0;row<X.size();row++)
      Y.setBooleanVariable(row,BooleanVariable.getBooleanVariable(Y.getName()+"_"+row));

    IProblem problem=new Conjunction(new Conjunction(pfix),new BitStringSetter(X,Y));
    System.out.println(problem);
    List s=PartialSolution.solveList(problem);
		if(s!=null && s.size()>0)
    {
      BooleanLiteral.interpret(s);
    	System.out.println("X= "+X);
    	System.out.println("Y= "+Y);
    }
    else
      System.out.println("No solution.");
  }
}