1classCSh{intX;int (intx,int{}virtualvoidArea()=0;virtualvoidPerimeter()=0;classCCircle:public{intR;CCircle(intx,inty,int {}virtualvoid{}virtualvoid{}classCRect:public{intwidth;int{}virtualvoid{}virtualvoid{}void{ CRectCCirclec(30,40,50);for(int{}}點(diǎn)評：基類中的兩個數(shù)據(jù)成員可以不要，因?yàn)闆]有實(shí)際功能。XY不要了之后，基類構(gòu)class {intX;intCPoint(intx=0,inty={X=Y=}{X=Y=widthwidth=}int{return}int{return}class{charColor[10]; (char{}virtualintGetPrim()=0;virtualintGetArea()=0;voidDraw(){cout<<"Drawash.Thecoloris}void{}classCRect:public{CPointStart;intlength;intwidth;CRect(CPoints,char*c,intl,intw):CSh{length=}int{return}int{return}void{cout<<"DrawaRectanglefrom("<<Start.GetX()<<","<<Start.GetY()<<"),";cout<<"withlengthis"<<length<<",widthis"<<width<<".";cout<<"it'sPrimis"<<GetPrim()<<",";cout<<"Areais"<<GetArea()<<",coloris";}classCCircle:public{CPointCenter;intRadius;CCircle(CPointctr,intr,char*c):CSh{Radius=}int{return}int{return}void{cout<<"Drawacircleatcenter("<<Center.GetX()<<","<<Center.GetY()<<"),";cout<<"withradiusis"<<Radius<<","cout<<"it'sprimiscout<<",areais"<<GetArea()<<",coloris";}void{ CPointCRectangler(p1,"Green",20,10);CCirclec(p2,30,"Black");p[1]=p[2]=for(inti=1;i<{}}main函數(shù)中的調(diào)用是不同的。class{virtualvoidArea()=0;virtualvoidPerimeter()=0;classCCircle:public{intR;CCircle(int{}virtualvoid{}virtualvoid{}classCRect:public{intwidth;intCRect