c 定义一个圆类,属性半径(r),要求设置半径,获取半径,计算周长,面积.

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

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

classCircle{public:Circle(intnr){r=nr;}Circle(){}public:intr;intArea(){return3.14*r*r;}};classB{publ

两个圆的半径之和为60厘米,其中一个圆的半径为r厘米,则另一个圆的半径为(60-r)厘米这两个圆的周长的1/3分别为:2∏r*1/3=2∏r/32∏(60

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

大家给你回答了这么的方法你一个也不采纳?a[]b=newa[8];这宗定义类型前提类a必须继承这些【PagedControl,INamingContainer,ITemplateable,IPostB

classcircle{public:circle(floatr=0){this->r=r;}floatarea();{return3.14*r*r;}private:floatr;};再问：再问：为

using System;using System.Collections.Generic;using System.Text;using System.IO;

把这三个类分别放到三个.java文件中,然后编译运行即可.publicclassCircle{privatedoubler;publicCircle(doubler){this.r=r;}public

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

这个是pascal的做法programabcconstpai=3.14varR,Area:real;beginwriteln("pleaseinputanumberforr:");readln(r);

#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

2π再问：2π怎么来的啊？再答：c=2πr所以c:r=2π

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

packageexample;publicclassTriangle{publicdoublegrith(doublea,doubleb,doublec){returna+b+c;}publ