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(008) CubeIDE Implementation of USB Peripherals*
(018) C99 pointer*
(019) C99 With only value assignment*
(022) POSIX pthread multi-threads mutex*
(023) POSIX pthread multi-threads programming*
(027) C99 time and wait*
(028) High-precision calculation with GMP*
(029) Web Service Lib*
(030) International Components for Unicode (ICU)*
(031) Performance of C is higher than C++, because...*
(032) C99 weak function
C99中的__weak函数（弱函数），就是一个有函数定义的、可以被覆盖（可以被重新定义） 的函数。