C++面向对象程序设计第六章课后习题答案 .docx

《C++面向对象程序设计第六章课后习题答案 .docx》由会员分享，可在线阅读，更多相关《C++面向对象程序设计第六章课后习题答案 .docx（11页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、精品名师归纳总结第六章课后习题答案其次版谭浩强1:/xt6 -1/cpp#include / 如用 VC+应改为 #include using namespace std;/ 如用 VC+应取消此行#include cylinder.h #include point.cpp #include circle.cpp #include cylinder.cpp int mainCylinder cy13.5,6.4,5.2,10;coutnoriginal cylinder:nx=cy1.getX, y=cy1.getY, r=cy1.getRadius, h=cy1.getHeightnarea

2、=cy1.area, volume=cy1.volumeendl; cy1.setHeight15; cy1.setRadius7.5; cy1.setPoint5,5;coutnnew cylinder:ncy1; Point &pRef=cy1;coutnpRef as a point:pRef; Circle &cRef=cy1;coutncRef as a Circle:cRef; return 0;可编辑资料 - - - 欢迎下载精品名师归纳总结3:解法一#include using namespace std; class Pointpublic:Pointfloat a,floa

3、t b:xa,ybPointcoutexecuting Point destructorendl; private:float x; float y;class Circle:public Pointpublic:Circlefloat a,float b,float r:Pointa,b,radiusrCirclecoutexecuting Circle destructorendl; private:float radius;int mainPoint *p=new Circle2.5,1.8,4.5; delete p;return 0;可编辑资料 - - - 欢迎下载精品名师归纳总结3

4、：解法二 #include using namespace std; class Pointpublic:Pointfloat a,float b:xa,ybPointcoutexecuting Point destructorendl; private:float x; float y;class Circle:public Pointpublic:Circleint a,int b,int r:Pointa,b,radiusrCirclecoutexecuting Circle destructorendl; private:float radius;int mainPoint *p=ne

5、w Circle2.5,1.8,4.5; Circle *pt=new Circle2.5,1.8,4.5; delete pt;可编辑资料 - - - 欢迎下载精品名师归纳总结return 0;3：解法三 #include using namespace std; class Pointpublic:Pointfloat a,float b:xa,ybvirtual Pointcoutexecuting Point destructorendl; private:float x; float y;class Circle:public Pointpublic:Circlefloat a,fl

6、oat b,float r:Pointa,b,radiusrvirtual Circlecoutexecuting Circle destructorendl; private:float radius;void mainPoint *p=new Circle2.5,1.8,4.5; delete p;可编辑资料 - - - 欢迎下载精品名师归纳总结4：#include using namespace std;/ 定义抽象基类Shape class Shapepublic:virtual double area const =0;/ 纯虚函数;/ 定义 Circle 类class Circle

7、:public Shapepublic:Circledouble r:radiusr/ 结构函数virtual double area const return 3.14159*radius*radius;/ 定义虚函数protected:double radius;/ 半径;/ 定义 Rectangle 类class Rectangle:public Shapepublic:Rectangledouble w,double h:widthw,heighth/ 结构函数virtual double area const return width*height;/ 定义虚函数protected:

8、可编辑资料 - - - 欢迎下载精品名师归纳总结double width,height;/ 宽与高;class Triangle:public Shapepublic:Triangledouble w,double h:widthw,heighth/ 结构函数virtual double area const return 0.5*width*height;/ 定义虚函数protected:double width,height;/ 宽与高;/ 输出面积的函数void printAreaconst Shape &scouts.areaendl;/ 输出 s 的面积int mainCircle

9、circle12.6;/ 建立 Circle 类对象circlecoutarea of circle=;printAreacircle;/ 输出 circle 的面积Rectangle rectangle4.5,8.4;/ 建立 Rectangle 类对象 rectanglecoutarea of rectangle =;printArearectangle;/ 输出 rectangle的面积可编辑资料 - - - 欢迎下载精品名师归纳总结Triangle triangle4.5,8.4; / 建立 Triangle 类对象coutarea of triangle=;printAreatria

10、ngle;/ 输出 triangle 的面积return 0;5：#include using namespace std;/ 定义抽象基类Shape class Shapepublic:virtual double area const =0;/ 纯虚函数;/ 定义 Circle圆形 类class Circle:public Shapepublic:Circledouble r:radiusr/ 结构函数virtual double area const return 3.14159*radius*radius;/ 定义虚函数protected:double radius;/ 半径;/ 定义

11、 Square正方形 类class Square:public Shape可编辑资料 - - - 欢迎下载精品名师归纳总结public:Squaredouble s:sides/ 结构函数virtual double area const return side*side;/ 定义虚函数protected:double side;/ 定义 Rectangle矩形 类class Rectangle:public Shapepublic:Rectangledouble w,double h:widthw,heighth/ 结构函数virtual double area const return w

12、idth*height;/ 定义虚函数protected:double width,height;/ 宽与高;/ 定义 Trapezoid梯形 类class Trapezoid:public Shapepublic:Trapezoiddouble t,double b,double h:topt,bottomt,heighth /结构函数virtual double area const return 0.5*top+bottom*height;/ 定义虚函数protected:double top,bottom,height;/ 上底、下底与高;可编辑资料 - - - 欢迎下载精品名师归纳总

13、结/ 定义 Triangle三角形 类class Triangle:public Shapepublic:Triangledouble w,double h:widthw,heighth/ 结构函数virtual double areaconst return 0.5*width*height;/ 定义虚函数protected:double width,height;/ 宽与高;int mainCircle circle12.6;/ 建立 Circle 类对象circleSquare square3.5;/ 建立 Square 类对象 squareRectangle rectangle4.5,

14、8.4;/ 建立 Rectangle 类对象 rectangleTrapezoid trapezoid2.0,4.5,3.2;/ 建立 Trapezoid类对象trapezoidTriangle triangle4.5,8.4;/ 建立 Triangle 类对象Shape *pt5=&circle,&square,&rectangle,&trapezoid,▵/ 定义基类指针数组pt ，使它每一个元素指向一个派生类对象double areas=0.0;/areas 为总面积forint i=0;iarea;couttotol of all areas=areasendl;/ 输出总面积可编辑资料 - - - 欢迎下载精品名师归纳总结return 0;可编辑资料 - - - 欢迎下载