代數：添加兩個矩陣

Question

嗯，我想添加兩個矩陣，但我的數學是錯誤的，我想我沒有想法如何得到它的權利。我覺得絕對愚蠢，我能不知道這一點，但我的頭好痛，我全力以赴的選項

import java.util.Scanner; 
public class AddMatrices 
{ 
    public static void main(String[] args) 
    { 
     Scanner input = new Scanner(System.in); 

     int N = 3; 

     System.out.print("Enter matrix1: "); 
     double[][] matrix1 = new double[3][3]; 
     for (int i = 0; i < matrix1.length; i++) { 
     for (int j = 0; j < matrix1[i].length; j++) { 
      matrix1[i][j] = input.nextDouble(); 
     } 
     } 

     System.out.print("Enter matrix2: "); 
     double[][] matrix2 = new double[3][3]; 
     for (int i = 0; i < matrix1.length; i++) { 
     for (int j = 0; j < matrix1[i].length; j++) { 
      matrix2[i][j] = input.nextDouble(); 
     } 
     } 

     double[][] resultMatrix = addMatrix(matrix1, matrix2); 
     System.out.println("The addition of the matrices is "); 
     printResult(matrix1, matrix2, resultMatrix, '+'); 
    } 

    public static double[][] addMatrix(double[][] m1, double[][] m2) 
    { 
     double[][] result = new double[m1.length][m1[0].length]; 
     for (int i = 0; i < result.length; i++) { 
     for (int j = 0; j < result[0].length; j++) 
      m1[i][j] += m2[i][j]; 
     } 
     return result; 
    } 

    public static void printResult(double[][] m1, double[][] m2, double[][] m3, char op) 
    { 
     for (int i = 0; i < m1.length; i++) { 
     for (int j = 0; j < m1[0].length; j++) { 
      System.out.print(" " + m1[i][j]); 
     } 
     if (i == m1.length/2) 
      System.out.print(" " + op + " "); 
     else { 
      System.out.print(" "); 
     } 
     for (int j = 0; j < m2[0].length; j++) { 
      System.out.print(" " + m2[i][j]); 
     } 
     if (i == m1.length/2) 
      System.out.print(" = "); 
     else { 
      System.out.print(" "); 
     } 
     for (int j = 0; j < m3[0].length; j++) { 
      System.out.print(" " + m3[i][j]); 
     } 
     System.out.println(); 
     } 
    } 
} 

Answer 1

相反的：

m1[i][j] += m2[i][j]; 

做：

result[i][j] = m1[i][j] + m2[i][j];