Code\delphi\pudn\upandload\DATA\Delphi_888156\Delphi_888156\rd.txt ....\......\....\.........\....\.............\.............\数学表达式运算单元\calcular.pas ....\......\....\.........\....\.............\.............\..................\ayxhys_calcular.gif ....\......\....\.........\....\.............\.............\数学表达式运算单元