创建一个圆类,具有属性半径和圆心位置,求面积的方法

classcircle{intx;inty;floatradius;public:voidsetpoint(int&x,;int&y);voidsetradius(float&radius);floa

importjava.util.Scanner;classRound{\x09publicdoubleperimeter(doubleradius){\x09\x09returnradius*2;\x

classCircle{\x09privatedoubler;\x09publicvoidsetR(doubler)\x09{\x09\x09this.r=r;\x09}\x09publicdoubl

usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;namespaceConsoleApplic

#include#includeusingnamespacestd;classCircle{doubler,Area,Circumference;public:Circle(doublea=0);Ci

答案：c

classpoint;classshape{public:virtualdoublecircumference()=0;virtualdoublearea()=0;};#definePI3.14159

计算出圆的周长和面积functioncircle(r){this.r=rthis.Area=Areathis.Circum=Circum}functionCircum(){return(3.14*2*

#includeusingnamespacestd;constdoublepi=3.14;//Point类,派生出Rectangle类和Circle类,计算各派生类对象的面积Area（）.templa

这个简单,几行代码的事情.怎么没人答,懒得动手写,急需吗.再问：急需再答：importjava.util.Scanner;publicclassRectangle{publicstaticvoidma

2种差不多的方法,自己在VC6.0上面试试#include<iostream>usingnamespacestd;#definepi3.14classcircle{public:circl

#include"stdafx.h"#include#includeusingnamespacestd;classCircle{doubler,Area,Circumference;public:Ci

classcircle{doublerd;//半径成员public:circle(){rd=0.0;}//构造函数cirle(doubleb){rd=b;}//重构构造函数doublezc(){ret

#include"iostream"#include"cmath"usingnamespacestd;classCircle{public: Circle(doublex=0,doubley

#includeusingnamespacestd;classPoint{public:\x09Point(floatx1=0,floaty1=0)/*Point的构造函数,默认圆点为(0,0)*/\

publicclassCircle{privatedoubleradius;publicCircle(doubler){this.radius=r;}publicstaticvoidmain(Stri

classTable{publicStringtableName;publicfloattableWeight;publicfloattableWidth;publicfloattableLength

这个题目是老师出的?再问：是的，你会做吗？再答：祝贺你遇到了一个好老师！点类设置保存两点间距离的属性d，有新意。但不知保存和那个点之间的距离？你可以问一问你的老师，然后我来帮你做。点类派生类圆类，有创

publicclassWb{doublei=5.0;doublefindArea(){returnradius*radiu*3.14159;}publicstaticvoidmain(string[]

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