实验三_多态和模板.doc

实验三 多态与模板一、声明一个Shape抽象类，在此基础上派生出Rectangle和Circle类，二者都有GetArea（）和GetPerim（）函数，GetArea用来计算对象的面积，GetPerim用来计算对象的周长。封装上述各类，并编写测试程序。Shape.h的内容：class Shapepublic: Shape(); virtual void GetArea(); virtual void GetPerim(); virtual Shape();Shape.cpp的内容：#include Shape.hShape:Shape()Shape:Shape()void Shape:GetArea()void Shape:GetPerim()Circle.h的内容：#include Shape.hclass CCircle : public Shape public: virtual void GetPerim(); virtual void GetArea(); CCircle(); virtual CCircle();private: float r;Circle.cpp中的内容#include Circle.h#include math.h#include iostream.hCCircle:CCircle()cout请输入圆的半径：r;CCircle:CCircle()coutThank you very much!;void CCircle:GetArea() float s; float pi=3.14; s=pi*r*r; cout这个圆形的面积是:sendl;void CCircle:GetPerim() float c; float pi=3.14; c=2*pi*r; cout这个圆形的周长是:cendl; Rectangle.h中的内容：#includeShape.hclass Rectangle: public Shape private: float a,b;public: Rectangle(); virtual void GetArea(); virtual void GetPerim(); virtual Rectangle();Rectangle.cpp中的内容：#include Rectangle.h#include math.h#include iostream.hRectangle:Rectangle() cout请输入矩形的长和宽：ab;Rectangle:Rectangle() coutThank you very much!endl;void Rectangle:GetArea() float s; s=a*b; cout这个矩形的面积是:sendl;void Rectangle:GetPerim() float c; c=a+a+b+b; cout这个矩形的周长是:cendl;Shapetest.cpp中的内容：#includeCircle.h#includeRectangle.h#include iostream.hint main() CCircle C; C.GetArea(); C.GetPerim(); Rectangle R; R.GetArea(); R.GetPerim(); return 0;二、有一种栈，这种栈是按数组索引减小的方向增长的。初始时栈为空且top=21。往栈中压入3个字符后，索引top=18，栈顶元素为listtop=C。在这个栈模型中，索引top在每次push索引操作后减小，而在pop操作后则增大。用此模型实现stack类模板。并编写测试程序。templateclass TStackpublic: TStack(); TStack(); void push(T e); T pop(); T top() const;private: T itemN; int SP; /栈顶指针;stack.cpp中的内容：#include iostream.h#include stack.htemplateTStack:TStack() SP=N-1;templateTStack:TStack()templatevoid TStack:push(T e) SP=SP-1; itemSP=e;templateT TStack:pop() if(SP20) couterror.endl; return itemSP+;templateT TStack:top() const if(SP20) couterror.endl; return itemSP;void main() TStack x