PrefixInt prefixes a (user-configured) integer to its integer input stream.

PrefixInt 在它的整数输入流之前加上一个（用户配置的）整数。

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How do I ensure the user is only allowed integer input?

我如何确保只允许用户输入整数？

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How do I ensure the user is only allowed integer input?

我如何确保只允许用户输入整数？

youdao