实验三 多态性实验C.doc

实 验 报 告 班组 (系) 计算机 专 业 软件工程 实验名称 多态性试验 指导教师 苗立志 实验类型 验证 实验学时 2 实验时间 二、实验环境(实验设备) 硬件: 软件: 实验原理及内容 一 #includeiostream using namespace std; const double pi=3.14; double a=0; double v=0; class Container { protected: double radius; public: Container(double r) { radius=r; } virtual double area()=0; virtual double volume()=0; virtual void print ()=0; }; class Cube :public Container { public:Cube(double r):Container(r){} double area() { return a=6*radius*radius; } double volume() { return v=radius*radius*radius; } void print() { cout正方体的表面积:aendl; cout正方体的体积aendl; } }; class Sphere:public Container { public:Sphere(double r):Container(r){} double area() { return a=4*pi*radius*radius; } double volume() { return v=4/3*pi*radius*radius*radius;} void print() { cout球的表面积:aendl; cout球体积:vendl; } }; class Cylinder:public Container { public:Cylinder(double r,double h):Container(r) { high=h; } double area() { return a=2*pi*radius*radius+pi*(2*radius)*high; } double volume() { return v=pi*radius*radius*high; } void print() { cout圆柱的表面积:aendl; cout圆柱的体积:vendl; } protected : double high; }; void main () { Container*p; Cube Cu (2); Sphere Sp(2); Cylinder Cy(4,5); p=Cu; p-area(); p-volume(); p-print(); p=Sp; p-area(); p-volume(); p-print(); p=Cy; p-area(); p-volume(); p-print(); } 二 #includeiostream.h class Complex { private: float real; float imag; public: Complex(float r=0,float i=0) { real=r; imag=i; } void print() { coutreal+imagendl; } Complex operator*(Complex c1); Complex operator/(Complex c1); Complex operator++(int); friend Complex operator+(const Complex c1,const Complex c2); friend Complex operator-(const Complex c1,const Complex c2); friend Complex operator++(Complex c1); }; Complex Complex::operator*(Complex c1) { real=real*c1.real; imag=imag*c1.