Shape系列-4
时间: 1ms 内存:128M
描述:
小聪送给小亮和小华的形状他们都很喜欢,小亮和小华非要比一下他们两个的形状,来看看小聪更爱谁,请完成RsubC类。RsubC类中包括Rectangle类和Circle类的数据成员,新增布尔类型的数据成员sign(sign等于0时,新面积等于Rectangle+Circle,sign等于1时,新面积等于Rectangle-Circle),新定义了求面积的成员函数area()。但是小聪没有为RsubC类写构造函数和成员函数,请帮助小聪完成RsubC类。
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;}
提示:不用提交全部程序,只提交补充部分。
输入:
无
输出:
输出小聪测试的RsubC的面积。
示例输入:
示例输出:
RsubC area:2.86
提示:
参考答案(内存最优[1084]):
#include<stdio.h>
int main()
{
printf("RsubC area:2.86");
}
参考答案(时间最优[0]):
#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 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 Rectangle,public Circle
{
public:
RsubC(int c,double w,double h,double r,bool s);
double area();
//double price();
private:
bool sign;
};
RsubC::RsubC(int c,double w,double h,double r,bool s):Rectangle(c,w,h),Circle(c,r)
{
sign=s;
}
double RsubC::area()
{
double a;
if(sign==1)
a=width*height-PI*radius*radius;
else
a=width*height+PI*radius*radius;
return a;
}
int main()
{
RsubC rc=RsubC(1,2,3,1,1);
cout<<"RsubC area:"<<rc.area()<<endl;
return 0;
}
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