<pre><code>xString = input("Enter a number: ")
x = int(xString)
yString = input("Enter a second number: ")
y = int(yString)
print('The sum of ', x, ' and ', y, ' is ', x+y, '.', sep='')
</code></pre>
<p>在执行上述代码时,解释程序抛出语法错误,并指出如下语法错误。你知道吗</p>
<pre><code> print(?The sum of ?, x, ? and ?, y, ? is ?, sum, ?.?, sep=??)
</code></pre>
<p>语法错误:无效语法</p>