#include<math.h>
class Shape
{
public:
virtual float Area()=0
virtual void printArea()=0
}
class Circle
{
float radius
public:
Circle(float r)
{
radius=r
}
float Area()
{
return radius*radius*3.1416
}
void printArea()
{
cout<<"Circle's area is:"<<Area()<<endl
}
}
class Rectangle
{
float c,k
public:
Rectangle(float x,float y)
float Area()
{
return c*k
}
void printArea()
{
cout<<"Rectangle'area is:"<<Area()<<endl
}
}
Rectangle::Rectangle(float x,float y)
{
c=x
k=y
}
class Triangle
{
float a,b,c
public:
Triangle(float x,float y,float z)
float Area()
void printArea()
{
cout<<"Triangle's area is:"<<Area()<<endl
}
}
Triangle::Triangle(float x,float y,float z)
{
a=x
b=y
c=z
}
float Triangle::Area()
{
float w=(a+b+c)/2
float q=w*(w-a)*(w-b)*(w-c)
return sqrt(q)
}
int main()
{
Circle circle(2)
Rectangle rectangle(2,3)
Triangle triangle(3,4,5)
circle.printArea()
rectangle.printArea()
triangle.printArea()
}
您好，建立如下类的层次结构：以Shape 为抽象基类，从Shape类派生出Point、Line、Circle、Cylinder、Cone、Triangle、Rectangle和Polygon等类。请为各个类设计比较实用的成员，并编写合适的应用程序来测试该类的层次结构。#include<iostream>
#include<cmath>
#include<iomanip>
#ifndef CSHAPE_H
#define CSHAPE_h
usingnamespace std
constfloat PI=3.1
class CShape//CShape抽象类定义
{
public:
virtualfloat length()//图形长度
{
return 0.0
}
virtualfloat area()//图形面积
{
return 0.0
}
virtualfloat valum()//图形体积
{
return 0.0
}
virtualfloat zc()//图形周长
{
return 0.0
}
virtualvoid draw()=0//描绘图形
}
class CPoint:virtualpublic CShape//CPoint类定义
{
protected:
float x,y
public:
CPoint(float a,float b)
{
x=a
y=b
}
void setpoint(float a,float b)
{
x=a
y=b
}
void draw()
{
cout<<"点的坐标为："<<"("<<x<<","<<y<<")"<<endl
}
}
class CLine:virtualpublic CShape//线类定义
{
protected:
float x,y,z,k
public:
CLine(float a,float b,float c,float d)
{
x=a
y=b
z=c
k=d
}
void setline(float a,float b,float c,float d)
{
x=a
y=b
z=c
k=d
}
float length()
{
return(sqrt((x-z)*(z-z)+(y-k)*(y-k)))
}
void draw()
{
cout<<"两坐标分别为："<<"("<<x<<","<<y<<")"<<"，（"<<z<<","<<k<<")"<<endl
}
}
class CRectangle:virtualpublic CShape//长方形类定义
{
protected:
float length,width
public:
CRectangle(float l,float w)
{
length=l
width=w
}
void setrectangle(float l,float w)
{
length=l
width=w
}
float area()
{
return(length*width)
}
float zc()
{
return(2*(length+width))
}
void draw()
{
cout<<"长方形的长为："<<length<<setw(10)<<"宽为:"<<width<<endl
}
}
class CCircle:virtualpublic CShape//圆类定义
{
protected:
float radius
public:
CCircle(float r)
{
radius=r
}
void setcircle(float r)
{
radius=r
}
float area()
{
return(PI*radius*radius)
}
float zc()
{
return(2*PI*radius)
}
void draw()
{
cout<<"圆的半径为："<<radius<<endl
}
}
class CCylinder:virtualpublic CShape//圆柱类定义
{
protected:
float heigth,radius
public:
CCylinder(float r,float h)
{
heigth=h
radius=r
}
void setcylinder(float r,float h)
{
heigth=h
radius=r
}
float area()
{
return(PI*radius*radius+2*PI*radius)
}
float valum()
{
return(PI*radius*radius*heigth)
}
void draw()
{
cout<<"圆柱高度为："<<heigth<<setw(10)<<"半径为："<<radius<<endl
}
}
class CCone:virtualpublic CShape//定义一个圆锥类
{
protected:
float mx,radius
public:
CCone(float a,float b)
{
mx=a
radius=b
}
void setcone(float a,float b)
{
mx=a
radius=b
}
float valum()
{
return(PI*radius*radius*sqrt(mx*mx-radius*radius))
}
void draw()
{
cout<<"母线长为："<<mx<<setw(10)<<"半径长为："<<radius<<endl
}
}
class CTriangle:virtualpublic CShape//三角形类定义
{
protected:
float x,y,z
public:
CTriangle(float a,float b,float c)
{
x=ay=bz=c
}
void settriangle(float a,float b,float c)
{
x=ay=bz=c
}
float zc()
{
return(x+y+z)
}
float area()
{
float t=(x+y+z)/2
return(sqrt((t-x)*(t-y)*(t-z)))
}
void draw()
{
cout<<"三角形三边长分别为："<<x<<","<<y<<","<<z<<endl
}
}
class CPolygon:virtualpublic CShape//多边形类定义
{
protected:
float x
int y
public:
CPolygon(float a,int b)
{
x=a
y=b
}
void setpolygon(float a,int b)
{
x=a
y=b
}
float area()
{
return(sqrt(3.0)*x*x*y/4)
}
float zc()
{
return(x*y)
}
void draw()
{
cout<<"多边形的一边长为："<<x<<setw(10)<<"边数为："<<y<<endl
}
}
#endif
#include"CShape.h"
#include<iostream>
#include<iomanip>
usingnamespace std
void main()
{
char d='y'
int i(0)
cout<<"欢迎进入本系统！"
cout<<"请选择服务："<<endl
cout<<" 1.点的计算。"<<endl
cout<<" 2.线的计算。"<<endl
cout<<" 3.圆的计算。"<<endl
cout<<" 4.圆柱的计算。"<<endl
cout<<" 5.圆锥的计算。"<<endl
cout<<" 6.长方形的计算。"<<endl
cout<<" 7.多边形的计算。"<<endl
cout<<" 8.三角形的计算。"<<endl
cout<<" 9.退出。"<<endl
while(d=='Y'||d=='y')
{
cout<<"请输入你的选择："<<endl
cin>>i
if(i==1)
{
CShape *pshape
CPoint point(2.0,3.0)
float a,b
cout<<"请输入点的坐标："
cin>>a>>b
point.setpoint(a,b)
pshape=&point
pshape->draw()
}
elseif(i==2)
{
CShape *pshape
CLine line(1.0,2.0,3.0,4.0)
float a,b,c,d
cout<<"请依次输入两端点的坐标："
cin>>a>>b>>c>>d
line.setline(a,b,c,d)
pshape=&line
pshape->draw()
cout<<"线的长度为："<<pshape->length()<<endl
}
elseif(i==3)
{
CShape *pshape
CCircle circle(2.0)
float a
cout<<"请输入圆的半径："
cin>>a
circle.setcircle(a)
pshape=&circle
pshape->draw()
cout<<"圆的面积为"<<pshape->area()<<setw(10)<<"圆的周长为"<<pshape->zc()<<endl
}
elseif(i==4)
{
CShape *pshape
CCylinder yz(2.0,3.0)
float a,b
cout<<"请输入圆柱的底面半径和高："
cin>>a>>b
yz.setcylinder(a,b)
pshape=&yz
pshape->draw()
cout<<"圆柱的面积为："<<pshape->area()<<setw(10)<<"圆柱的体积为："<<pshape->valum()<<endl
}
elseif(i==5)
{
CShape *pshape
CCone cone(5.0,4.0)
float a,b
cout<<"请输入母线长和底面半径："
cin>>a>>b
cone.setcone(a,b)
pshape=&cone
pshape->draw()
cout<<"圆锥的体积为："<<pshape->valum()<<endl
}
elseif(i==6)
{
CShape *pshape
CRectangle rectangle(3.0,2.0)
float a,b
cout<<"请输入长方形的长和宽："
cin>>a>>b
rectangle.setrectangle(a,b)
pshape=&rectangle
pshape->draw()
cout<<"长方形的面积为："<<pshape->area()<<setw(10)<<"长方形的周长为："<<pshape->zc()<<endl
}
elseif(i==7)
{
CShape *pshape
CPolygon polygon(2.0,4)
float a
int b
cout<<"请输入多边形的边长和边数："
cin>>a>>b
polygon.setpolygon(a,b)
pshape=&polygon
pshape->draw()
cout<<"多边形的面积为："<<pshape->area()<<setw(10)<<"周长为："<<pshape->zc()<<endl
}
elseif(i==8)
{
CShape *pshape
CTriangle triangle(3.0,4.0,5.0)
float a,b,c
cout<<"请输入三角形三边长："
cin>>a>>b>>c
triangle.settriangle(a,b,c)
pshape=▵
pshape->draw()
cout<<"三角形的周长为："<<pshape->zc()<<"面积为："<<pshape->area()<<endl
}
elseif(i==9)
{
return
}
else
{
cout<<"输入错误，请重新输入！"
}
cout<<"是否继续其他操作（Y/N）?"<<endl
cin>>d
}
}
