
小强写的文件头和Shape类
#include<iostream>
#define PI 3.14
using namespace std;
class Shape
{
public:
Shape();
Shape(int c);
int getcolor();
double area();
protected:
int color;
};
Shape::Shape()
{
color=0;
}
Shape::Shape(int c)
{
color=c;
}
int Shape::getcolor()
{
return color;
}
double Shape::area()
{
return 10000;
}
小聪写的Rectangle类
class Rectangle:public Shape
{
public:
Rectangle(int c,double w,double h);
double getwidth();
double getheight();
double area();
double price();
protected:
double height;
double width;
};
Rectangle::Rectangle(int c,double w,double h):Shape(c)
{
width=w;
height=h;
}
double Rectangle::getwidth()
{
return width;
}
double Rectangle::getheight()
{
return height;
}
double Rectangle::area()
{
return height*width;
}
double Rectangle::price()
{
return height*width*color;
}
小聪写的Circle类
class Circle:public Shape
{
public:
Circle(int c,double r);
double getradius();
double area();
double price();
protected:
double radius;
};
Circle::Circle(int c,double r):Shape(c)
{
radius=r;
}
double Circle::getradius()
{
return radius;
}
double Circle::area()
{
return PI*radius*radius;
}
double Circle::price()
{
return PI*radius*radius*color;
}
小聪的测试函数:
int main()
{
RsubC rc=RsubC(1,2,3,1,1);
cout<<"RsubC area:"<<rc.area()<<endl;
return 0;
}
#include<iostream>
#define PI 3.14
using namespace std;
class Shape
{
public:
Shape();
Shape(int c);
int getcolor();
double area();
protected:
int color;
};
Shape::Shape()
{
color=0;
}
Shape::Shape(int c)
{
color=c;
}
int Shape::getcolor()
{
return color;
}
double Shape::area()
{
return 10000;
}
class Rectangle:public Shape
{
public:
Rectangle(int c,double w,double h);
double getwidth();
double getheight();
double area();
double price();
protected:
double height;
double width;
};
Rectangle::Rectangle(int c,double w,double h):Shape(c)
{
width=w;
height=h;
}
double Rectangle::getwidth()
{
return width;
}
double Rectangle::getheight()
{
return height;
}
double Rectangle::area()
{
return height*width;
}
double Rectangle::price()
{
return height*width*color;
}
class Circle:public Shape
{
public:
Circle(int c,double r);
double getradius();
double area();
double price();
protected:
double radius;
};
Circle::Circle(int c,double r):Shape(c)
{
radius=r;
}
double Circle::getradius()
{
return radius;
}
double Circle::area()
{
return PI*radius*radius;
}
double Circle::price()
{
return PI*radius*radius*color;
}
class RsubC:public Shape
{
public:
RsubC(int c,double w,double h,double r,bool s);
double area();
private:
Rectangle rectangle;
Circle circle;
bool sign;
};
RsubC::RsubC(int c,double w,double h,double r,bool s):Shape(c),rectangle(c,w,h),circle(c,r),sign(s){}
double RsubC::area()
{
if(sign==0)
return rectangle.area()+circle.area();
else
return rectangle.area()-circle.area();
}
int main()
{
RsubC rc=RsubC(1,2,3,1,1);
cout<<"RsubC area:"<<rc.area()<<endl;
return 0;
}
结果输出 小聪测试的RsubC的面积即 RsubC area:2.86
学习总结:
这几个shape类的题层层嵌套,循序渐进,很有用。