Java Reference
In-Depth Information
Exercise P7.10. Add a method
getWinner
to the
TicTacToe
class of
Section 7.6
. It should return
"x"
or
"o"
to indicate a winner, or
" "
if
there is no winner yet. Recall that a winning position has three matching
marks in a row, column, or diagonal.
Exercise P7.11. Write an application that plays tic-tac-toe. Your
program should draw the game board, change players after every
successful move, and pronounce the winner.
Exercise P7.12. Magic squares. An n¶n matrix that is filled with the
numbers 1, 2, 3, ș, n
2
is a magic square if the sum of the elements in each
row, in each column, and in the two diagonals is the same value. For
example,
16
3
2
13
5
10
11
8
9
6
7
12
4
15
14
1
Write a program that reads in n
2
values from the keyboard and tests
whether they form a magic square when arranged as a square matrix. You
need to test three features:
ȗ Did the user enter n
2
numbers for some n?
ȗ Do each of the numbers 1, 2, ș, n
2
occur exactly once in the user
input?
ȗ When the numbers are put into a square, are the sums of the rows,
columns, and diagonals equal to each other?
If the size of the input is a square, test whether all numbers between 1 and
n
2
are present. Then compute the row, column, and diagonal sums.
Implement a class
Square
with methods
public void add(int i)
public boolean isMagic()
