使用PCA9535芯片作数字输入／输出端口的驱动程序，支持异步通知功能。-PCA9535 chips used for digital I/O port drivers, support for asynchronous notifications.

利用函数getchar(), ungetc(), fprintf()来实现基于流的字符输入输出， 即读入键盘输入的数据，从中挑选出字符和数字组成的字符串或整数。-Using the function getchar (), ungetc (), fprintf () to achieve flow-based character input and output, that is read into the keyboard input of data, pick out a string of

输入整数列 输出其升序排列 再输出数字 可在其排列后的序列中寻找此数字是否存在 存在输出下标 不存在输出不存在-Input integer output column in ascending order of their re-export figures can be arranged in its sequence after finding the existence of the existence of this digital output output subscr ipt do