查到的资料在下面，刚刚研究了一下为什麽不是-rc @@ 推测是说，因为c是可以直接下(不需要-) r又合并使用，所以直接接在後面就认得了，比-rc简单 所以就变成cr了 (推测啦) 主要的功能就是确保要产生的Archive存在，并且如果早已存在就取代之 没加也没差的话应该就只是他需要确保的条件不成立而已:P **** man ar的结果 [generic modifiers] c Create the archive. The specified archive is always created if it did not exist, when you request an update. But a warning is issued unless you specify in advance that you expect to create it, by using this modifier. [commands] r Insert the files member... into archive (with replacement). This operation differs from q in that any previously existing members are deleted if their names match those being added. If one of the files named in member... does not exist, ar displays an error message, and leaves undisturbed any existing members of the archive matching that name. By default, new members are added at the end of the file; but you may use one of the modifiers a, b, or i to request placement relative to some existing member. The modifier v used with this operation elicits a line of output for each file inserted, along with one of the letters a or r to indicate whether the file was appended (no old member deleted) or replaced. --

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