简单的Java循环控制实现行列式算法

发表于:2007-06-22来源:作者:点击数: 标签:
public class Arranger { private double[][] arrangerMatrix; private double arrangerResult=1.0; public static void main(String args[]){ double[][] a={{4,1,4,8},{1,1,3,2},{2,2,5,1},{2,2,1,4}}; Arranger ar=new Arranger(); ar.arrFunction(a);//

   
  public class Arranger {
  private double[][] arrangerMatrix;
  private double arrangerResult=1.0;
  public static void main(String args[]){
  double[][] a={{4,1,4,8},{1,1,3,2},{2,2,5,1},{2,2,1,4}};
  

  Arranger ar=new Arranger();
  ar.arrFunction(a);//把行列式变成上三角行列式
  ar.displayMatrix();//显示得出的上三角行列式
  ar.displayResult(); //显示行列式计算结果
  }
  public void arrFunction(double[][] a){//Guass 消去
  double k=0;
  for (int p = 0; p  for (int r =p+1; r  k=a[r][p]/a[p][p];
  a[r][p]=0;
  for (int c = p+1; c  a[r][c]=a[r][c]-k*a[p][c];
  }//u
  }//r
  }//c
  arrangerMatrix=new double[a.length][a[0].length];
  for (int i = 0; i  for (int j = 0; j  arrangerMatrix[i][j]=a[i][j];
  if (i==j) {arrangerResult=arrangerResult*a[i][j];}//计算主对角线相乘的结果
  //System.out.println (a[i][j]+" ");
  }//j
  }//i
  }
  public void displayMatrix(){
  for (int i = 0; i  for (int j = 0; j  System.out.print (arrangerMatrix[i][j]+" ");
  }//j
  System.out.println ();
  }//i
  }
  public void displayResult(){
  System.out.println ("The result is "+arrangerResult);
  }

原文转自:http://www.ltesting.net