函数将返回书写的字符串长度。

The fprintf() function returns the length of the written string.

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这个函数将返回写入的字符串长度；如果执行失败将返回False。

This function returns the length of the written string, or FALSE on failure.

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返回改变后的字符串长度。

The length of the changed string.

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返回的字符串可能与输入字符串长度不同。

The returned string might differ in length from the input string.

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返回的字符串可能与输入字符串长度不同。

The returned string might differ in length from the input string.

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