擅长:python、mysql、java
<p>您可以在一个无休止的循环中读取输入,直到用户输入一个有效的整数。例如:</p>
<pre><code>while True:
try:
val = int(raw_input("Enter an integer:"))
except ValueError:
print "I said an integer"
else:
# ValueError was not thrown, which means the user entered a valid integer
break
</code></pre>