C++面向?qū)ο蟪绦蛟O(shè)計第六章課后習題答案(第2版-譚浩強)

C++面向?qū)ο蟪绦蛟O(shè)計第六章課后習題答案(第2版—譚浩強)C++面向?qū)ο蟪绦蛟O(shè)計第六章課后習題答案(第2版—譚浩強)C++面向?qū)ο蟪绦蛟O(shè)計第六章課后習題答案(第2版—譚浩強)C++面向?qū)ο蟪绦蛟O(shè)計第六章課后習題答案(第2版—譚浩強)編制僅供參考審核批準生效日期地址：電話：傳真:郵編:第六章課后習題答案（第二版譚浩強）1://xt6-1/cpp#include<iostream>//如用VC++應(yīng)改為∶#include<>usingnamespacestd;//如用VC++應(yīng)取消此行#include""#include""#include""#include""intmain(){Cylindercy1,,,10);cout<<"\noriginalcylinder:\nx="<<()<<",y="<<()<<",r="<<()<<",h="<<()<<"\narea="<<()<<",volume="<<()<<endl;(15);;(5,5);cout<<"\nnewcylinder:\n"<<cy1;Point&pRef=cy1;cout<<"\npRefasapoint:"<<pRef;Circle&cRef=cy1;cout<<"\ncRefasaCircle:"<<cRef;return0;}3:解法一#include<iostream>usingnamespacestd;classPoint{public:Point(floata,floatb):x(a),y(b){}~Point(){cout<<"executingPointdestructor"<<endl;}private:floatx;floaty;};classCircle:publicPoint{public:Circle(floata,floatb,floatr):Point(a,b),radius(r){}~Circle(){cout<<"executingCircledestructor"<<endl;}private:floatradius;};intmain(){Point*p=newCircle,,;deletep;return0;}3：解法二#include<iostream>usingnamespacestd;classPoint{public:Point(floata,floatb):x(a),y(b){}~Point(){cout<<"executingPointdestructor"<<endl;}private:floatx;floaty;};classCircle:publicPoint{public:Circle(inta,intb,intr):Point(a,b),radius(r){}~Circle(){cout<<"executingCircledestructor"<<endl;}private:floatradius;};intmain(){Point*p=newCircle,,;Circle*pt=newCircle,,;deletept;return0;}3：解法三#include<iostream>usingnamespacestd;classPoint{public:Point(floata,floatb):x(a),y(b){}virtual~Point(){cout<<"executingPointdestructor"<<endl;}private:floatx;floaty;};classCircle:publicPoint{public:Circle(floata,floatb,floatr):Point(a,b),radius(r){}virtual~Circle(){cout<<"executingCircledestructor"<<endl;}private:floatradius;};voidmain(){Point*p=newCircle,,;deletep;}4：#include<iostream>usingnamespacestd;//定義抽象基類ShapeclassShape{public:virtualdoublearea()const=0;//純虛函數(shù)};//定義Circle類classCircle:publicShape{public:Circle(doubler):radius(r){}//結(jié)構(gòu)函數(shù)virtualdoublearea()const{return*radius*radius;};//定義虛函數(shù)protected:doubleradius;//半徑};//定義Rectangle類classRectangle:publicShape{public:Rectangle(doublew,doubleh):width(w),height(h){}//結(jié)構(gòu)函數(shù)virtualdoublearea()const{returnwidth*height;}//定義虛函數(shù)protected:doublewidth,height;//寬與高};classTriangle:publicShape{public:Triangle(doublew,doubleh):width(w),height(h){}//結(jié)構(gòu)函數(shù)virtualdoublearea()const{return*width*height;}//定義虛函數(shù)protected:doublewidth,height;//寬與高};//輸出面積的函數(shù)voidprintArea(constShape&s){cout<<()<<endl;}//輸出s的面積intmain(){Circlecircle;//建立Circle類對象circlecout<<"areaofcircle=";printArea(circle);//輸出circle的面積Rectanglerectangle,;//建立Rectangle類對象rectanglecout<<"areaofrectangle=";printArea(rectangle);//輸出rectangle的面積Triangletriangle,;//建立Triangle類對象cout<<"areaoftriangle=";printArea(triangle);//輸出triangle的面積return0;}5：#include<iostream>usingnamespacestd;//定義抽象基類ShapeclassShape{public:virtualdoublearea()const=0;//純虛函數(shù)};//定義Circle(圓形)類classCircle:publicShape{public:Circle(doubler):radius(r){}//結(jié)構(gòu)函數(shù)virtualdoublearea()const{return*radius*radius;};//定義虛函數(shù)protected:doubleradius;//半徑};//定義Square(正方形)類classSquare:publicShape{public:Square(doubles):side(s){}//結(jié)構(gòu)函數(shù)virtualdoublearea()const{returnside*side;}//定義虛函數(shù)protected:doubleside;};//定義Rectangle(矩形)類classRectangle:publicShape{public:Rectangle(doublew,doubleh):width(w),height(h){}//結(jié)構(gòu)函數(shù)virtualdoublearea()const{returnwidth*height;}//定義虛函數(shù)protected:doublewidth,height;//寬與高};//定義Trapezoid(梯形)類classTrapezoid:publicShape{public:Trapezoid(doublet,doubleb,doubleh):top(t),bottom(t),height(h){}//結(jié)構(gòu)函數(shù)virtualdoublearea()const{return*(top+bottom)*height;}//定義虛函數(shù)protected:doubletop,bottom,height;//上底、下底與高};//定義Triangle(三角形)類classTriangle:publicShape{public:Triangle(doublew,doubleh):width(w),height(h){}//結(jié)構(gòu)函數(shù)virtualdoublearea()const{return*width*height;}//定義虛函數(shù)protected:doublewidth,height;//寬與高};intmain(){Circlecircle;//建立Circle類對象circleSquaresquare;//建立Square類對象squareRectanglerectangle,;//建立Rectangle類對象rectangleTrapezoidtrapezoid,,;//建立Trapezoid類對象trapezoidTriangletriangle,;//建立Triangle類對象Shape*pt[5]={&circle,&square,&rectangle,&t