//Express.cpp//Function.cpp:Definestheclassbehaviorsfortheapplication.//#include"stdafx.h"#include"math.h"#include"express.h"#include#ifdef_DEBUG#definenewDEBUG_NEW#undefTHIS_FILEstaticcharTHIS_FILE[]=__FILE__;#endifIMPLEMENT_SERIAL(CExpression,COb