描述:SN74LS258B Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs Technology Family:LS Rating:Catalog Function:Encoder,Multiplexer
描述:Circular MIL Spec Connector TV 19C 19#12 PIN J/N RECP Product Attribute:Attribute Value Manufacturer:Amphenol(安费诺) Product Category:Circular MIL Spec Connector
各位大神大家好,目前在阅读代码时,发现有这么一个用法【f->keep_last = !!keep_last;】这个【!!】是个什么意思?这么用有什么好处呢?[code]static int frame_queue_init(FrameQueue *f, PacketQueue *pktq, int max_size, int keep_last){int i;memset(f, 0, sizeof
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