This paper mainly is automatic refinement of cartesian operator in set theory. 本文主要研究的是集合论中笛卡尔积算子的自动求精。
; Fifth, generate target programme ( C++ code) in according to the information in analysis of semantics and symbol table, as well as the refinement rule of set theory operator in generating target code stage. 目标代码生成阶段根据语义分析的信息、符号表的信息以及集合论算子的求精规则产生目标程序,即C++程序代码。