.在KeilARM的LPCARM,存在(1<<31)編譯警告問題main.c(174): warning: #61-D: integer operation result is out of rangemain.c(174): warning: #68-D: integer conversion resulted in a change of sign由於編譯器默認signed int即32位有符號整數類型,而1<<31實際為0x80000000,這樣就有可能改寫了符號位(最高位)依此類推,(2<<30),(3<<29)...等都會出現編譯警告問題.解決辦法為: ((unsigned int)1<<31),((unsigned int)2<<30),...
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