Java 作业题4

 

 

 

 

package homwk;
import java.util.Arrays;
import java.util.Scanner;


public class hmwk6 {

    public static void main(String[] args)
    {
        @SuppressWarnings("resource")
        
        Scanner input = new Scanner(System.in);
        final int N = 3;
        double a[][] = new double[N][N];
        double b[][] = new double[N][N];
        double c[][] = new double[N][N];
        for(int i = 0;i<a.length;i++)
        {
            for(int j = 0;j<a[i].length;j++)
            {
                a[i][j] = input.nextDouble();  
            }
        }

        for(int i = 0;i<b.length;i++)
        {
            for(int j = 0;j<b[i].length;j++)
            {
                b[i][j] = input.nextDouble();
            }
        }
        
        
        

       for(int i = 0;i<a.length;i++)
       {
           for(int j = 0;j<a.length;j++)
           {
               for(int k = 0;k<a.length;k++)
               {
                   c[i][j] += a[i][k]*b[k][j];
               }
           }
       }
  
       System.out.println("输出矩阵相乘得到的矩阵c：");
       for(int i = 0;i<c.length;i++)
       {
           for(int j = 0;j<c.length;j++)
           {
               System.out.printf("%.1f",c[i][j]);
               if(j == 4)
               {
                   System.out.println();
               }
               else
               {
                   System.out.print(",");
               }
           }
       }
       
       public static void sort0(  int m[][]) 
       { 
           
           for (int k = 0; k < m.length; k++) { 
               Arrays.sort(m[k]);
           }
           for (int i = 0; i < m.length; i++)
           {
               for (int j = 0; j < m[i].length; j++) 
               {
                   System.out.print(m[i][j] + "   ");
               }
               System.out.println();
           }
    

       
       
       
       }
       
    

    
    
}