OJ 继承与组合类问题之 Shape系列 5

JC和Kitty听说小亮和小华有了Rectangle和Circle并用RsubC类比较了大小，于是想借小亮和小华的Rectangle和Circle来仿制自己的形状，于是JC和Kitty完成了自己的rectangle类和circle类，他们两个也要比较一下形状大小。但是JC和Kitty没有为RsubC1类（其中的布尔类型sign等于0时，新面积等于Rectangle+Circle，sign等于1时，新面积等于Rectangle-Circle）写构造函数与area面积函数，请帮助JC和Kitty完成RsubC1类。
//小强写的文件头和各种类

#include<iostream>

using namespace std;

#define pi 3.14

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 1000;

}

class Rectangle:public Shape

{

public:

 Rectangle();

 Rectangle(int c, double w,double h);

 double getwidth();

 double getheight();

 double area();

 double price();

protected:

 double width,height;

};

Rectangle::Rectangle()

{

 width=10;height=5;

}

Rectangle::Rectangle(int c, double w,double h):Shape(c)

{

 width=w;

 height=h;

}

double Rectangle::getwidth()

{

 return width;

}

double Rectangle::area()

{

 return width*height;

}

double Rectangle::getheight()

{

 return height;

}

double Rectangle::price()

{

 return color*width*height;

}

class Circle:public Shape

{

public:

 Circle();

 Circle(int c,double r);

 double getradius()

 {

  return radius;

 }

 double area();

protected:

 double radius;

};

Circle::Circle()

{

 radius=10;

}

Circle::Circle(int c,double r):Shape(c)

{

 radius=r;

}

double Circle::area()

{

 return radius*radius*pi;

}

// RsubC1类

class RsubC1:public Shape

{

public:

 RsubC1(int c,double w,double h,double r,bool s);

 double area();

private:

 Rectangle rectangle;

 Circle circle;

 bool sign;

};

//JC和Katy的测试函数：

int main()

{

 RsubC1 rc1=RsubC1(3,2,3,1,1);

 

 RsubC1 rc2=RsubC1(1,2,1,2,0);

 cout<<"rc1 area="<<rc1.area()<<endl;

 

 cout<<"rc2 area="<<rc2.area()<<endl;

 return 0;

}

提示：不用提交全部程序，只提交补充部分。

Input

无

Output

输出JC和Katy测试的RsubC类的面积。

#include<iostream>
using namespace std;
#define pi 3.14
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 1000;
}
class Rectangle:public Shape
{
public:
Rectangle();
Rectangle(int c, double w,double h);
double getwidth();
double getheight();
double area();
double price();
protected:
double width,height;
};
Rectangle::Rectangle()
{
width=10;height=5;
}
Rectangle::Rectangle(int c, double w,double h):Shape(c)
{
width=w;
height=h;
}
double Rectangle::getwidth()
{
return width;
}

double Rectangle::area()
{
return width*height;
}
double Rectangle::getheight()
{
return height;
}

double Rectangle::price()
{
return color*width*height;
}
class Circle:public Shape
{
public:
Circle();
Circle(int c,double r);
double getradius()
{
return radius;
}
double area();
protected:
double radius;
};
Circle::Circle()
{
radius=10;
}
Circle::Circle(int c,double r):Shape(c)
{
radius=r;
}
double Circle::area()
{
return radius*radius*pi;
}

// RsubC1类

class RsubC1:public Shape
{
public:
RsubC1(int c,double w,double h,double r,bool s);
double area();
private:
Rectangle rectangle;
Circle circle;
bool sign;
};
//JC和Katy的测试函数：
RsubC1::RsubC1(int c,double w,double h,double r,bool s):Shape(c),rectangle(c,w,h),circle(c,r),sign(s){}
double RsubC1::area()
{
if(sign==0)
return rectangle.area()+circle.area();
else
return rectangle.area()-circle.area();
}

int main()
{
RsubC1 rc1=RsubC1(3,2,3,1,1);

RsubC1 rc2=RsubC1(1,2,1,2,0);

cout<<"rc1 area="<<rc1.area()<<endl;

cout<<"rc2 area="<<rc2.area()<<endl;

return 0;
}

赶时间呢就不贴运行结果了   这个可以参照之前做过的项目存储班长信息的学生类
继承与组合用起来有点儿不熟练
另外因为输出问题导致OJ上的题老是不能通过  这个我已经真心给跪了><
一边敲代码一边气的不行...