Unsigned short sem_num; (semaphore number).
unsigned short sem_num；(信号量个数)。
If you must multiply, cast to an unsigned short before multiplying.
如果一定要计算乘法，可以在计算乘法之前转换为unsigned short。
This is true for unsigned short, unsigned long, and unsigned long long.
对于unsigned short , unsignedlong ,以及 unsigned long long 来说也是这样。
This is true for unsigned short, unsigned long, and unsigned long long.
对于unsigned short , unsignedlong ,以及 unsigned long long 来说也是这样。
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