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);//把行列式變成上三角行列式 ar.displayMatrix();//顯示得出的上三角行列式 ar.displayResult(); //顯示行列式計算結果 } 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];}//計算主對角線相乘的結果 //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); }
