我編寫的用于乘法矩陣的函數(shù)沒有正確放出或給我一個(gè)空白的函數(shù)。它設(shè)法給了我一個(gè)正確的輸出，盡管我再也找不到那個(gè)數(shù)組了。當(dāng)我輸入它返回一個(gè)零數(shù)組時(shí)int[][] test = new int[][]{      {2, 4},      {5, 3},      {3, 5}    };    int[][] test2 = new int[][]{      {3, 4, 2},      {5, 1, 2}};    int[][] toRet = new int[arr1.length][arr2[0].length];    for(int i = 0; i < arr1.length; i++){      for(int j = 0; j < arr2[0].length; j++){        for(int k = 02; k < arr1[0].length; k++){          toRet[i][j] += arr1[i][k] * arr2[k][j];        }      }    }    return toRet;  }```  It worked for a minute and I didn't change anything but my test.