Shape系列-2
时间: 1ms 内存:128M
描述:
小聪不喜欢小强的Shape类,声称用Shape类做出的形状不真实,于是小聪创建了Rectangle类,并且决定用该类做两个矩形出来,送给好朋友小亮。Rectangle类有整型的数据成员color(小强的Shape类中的color可以继续使用,无需新定义),浮点型的数据成员width和height,求面积的成员函数area()。但是小聪没有为Rectangle类写构造函数和成员函数,请帮助小聪完成Rectangle类。
小强写的文件头和Shape类:#include<iostream>
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;
}
小聪的测试函数:int main(){Rectangle rr=Rectangle(1,2,3);cout<<"Rectangle color:"<<rr.getcolor()<<endl<<"Rectangle width:"<<rr.getwidth()<<endl<<"Rectangle height:"<<rr.getheight()<<endl<<"Rectangle area:"<<rr.area()<<endl<<"Rectangle price:"<<rr.price()<<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:
输出小聪创建的矩形的相关数据。
示例输入:
示例输出:
Rectangle color:1
Rectangle width:2
Rectangle height:3
Rectangle area:6
Rectangle price:6
提示:
参考答案(内存最优[1088]):
#include<stdio.h>
int main()
{
printf("Rectangle color:1\nRectangle width:2\nRectangle height:3\nRectangle area:6\nRectangle price:6\n");
}
参考答案(时间最优[0]):
#include<iostream>
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;
}
int main()
{
Rectangle rr=Rectangle(1,2,3);
cout<<"Rectangle color:"<<rr.getcolor()<<endl
<<"Rectangle width:"<<rr.getwidth()<<endl
<<"Rectangle height:"<<rr.getheight()<<endl
<<"Rectangle area:"<<rr.area()<<endl
<<"Rectangle price:"<<rr.price()<<endl;
return 0;
}
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