方阵相乘

约定不等于承诺〃 2021-07-24 16:15 324阅读 0赞

**一 代码**

package Matrix;
    
    /**
    * Copyright (C), 2020-2020, XXX有限公司
    * FileName: Matrix
    * Author:   cakin
    * Date:     2020/1/6
    * Description: 方阵相乘
    * a[][]*b[][]=c[][]
    * 代码中：
    * i:代表c的行
    * j：代表c的列
    * k：代表第几次进行相加运算
    */
    public class Matrix {
        public static void matrix( double[][] a, double[][] b, double[][] c ) {
            int N = a.length;
            for (int i = 0; i < N; i++)
                for (int j = 0; j < N; j++) {
                    for (int k = 0; k < N; k++) {
                        c[i][j] += a[i][k] * b[k][j];
                    }
                }
        }
    
    
        public static void main( String[] args ) {
            int N = 10;
            double[][] a;
            double[][] b;
            double[][] c = new double[N][N];
            a = new double[N][N];
            b = new double[N][N];
    
    
            for (int i = 0; i < N; i++) {
                for (int j = 0; j < N; j++) {
                    a[i][j] = 1.0;
                    b[i][j] = 2.0;
                }
            }
            matrix(a, b, c);
            for (int i = 0; i < N; i++) {
                for (int j = 0; j < N; j++) {
                    System.out.print(c[i][j] + " ");
                }
                System.out.println();
            }
        }
    }

**二 测试**

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