2009软件工程编译原理课程设计指导书

<program>::=<sequence>

<sequence>::=<sentence>{ <sentence>}

<sentence>::=<input sentence>|<output sentence>

|<evaluate sentence>|<condition sentence>

|<determinacy loop sentence>|<indeterminacy loop sentence>

<input sentence>::=read<variable>{ <variable>}

<output sentence>::=write<variable>{ <variable>}

<evaluate sentence>::=<variable>:=<expressi

-<program>::=<sequence>

<sequence>::=<sentence>{　<sentence>}

<sentence>::=<input sentence>|<output sentence>

|<evaluate sentence>|<condition sentence>

|<determinacy loop sentence>|<indeterminacy loop sentence>

<input sentence>::=read<variable>{　<variable>}

<output sentence>::=write<variable>{　<variable>}

<evaluate sentence>::=<variable>:=<expressi