YTU 2918: Shape系列-5

2919: Shape系列-5

时间限制: 1 Sec  内存限制: 128 MB

提交: 251  解决: 199

题目描述

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。

输入

无

输出

输出JC和Katy测试的RsubC类的面积。

样例输出

rc1 area=2.86
rc2 area=14.56

im0qianqian_站在回忆的河边看着摇晃的渡船终年无声地摆渡,它们就这样安静地画下黄昏画下清晨......

#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;
}

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;
};
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;
}