擅长:python、mysql、java
<p>将<code>#</code>作为网格,第3行、第3列替换为<code>@</code>:</p>
<pre><code>>>> size = 5
>>> c = '#'
>>> g = [size*[c] for i in range(size)]
>>> g[3][3] = '@'
>>> print('\n'.join(' '.join(row) for row in g))
# # # # #
# # # # #
# # # # #
# # # @ #
# # # # #
</code></pre>