這個課程的參考視訊和圖片來自youtube。

    主要學到的知識點有：

1. Multidimensional Array: Array that has more than one dimension.

• Create a array with two dimensions.

char[][] board = new char[3][3];    // tic-tac-toe board
board[0][0] = 'X';                  // place an X in upper-left
board[1][2] = 'O';                  //
 
 place an O in row 1 col 2
board[2][0] = 'X';                  // place an X in row 2 col 0
board[2][2] = 'O';                  // place an O in row 2 col 0
board[1][1] = 'W';                  // place an W in row 1 col 1
        
 // Print the array
 for (int i=0;i<3;i++) {
    for (int j=0;j<3;j++) {
         System.out.printf(
 
"[%d][%d]=%s ",i,j,board[i][j]);
     }
}

//The result is shown as below
[0][0]=X [0][1]=    [0][2]= 
[1][0]=   [1][1]=W [1][2]=O 
[2][0]=X [2][1]=    [2][2]=O