编写一个圆类circle

classCircle{private:intm_nR;public:Circle(intnR){m_nR=nR;}floatOutputF(){return2*3.1415926*(float)m_

#include"stdio.h"constdoubleP=3.14;classCircle{public:virtualdoubleArea();voidR(doubles);doublegetr(

好难!

publicclassRectangle{privatedoublewidth;privatedoublelength;publicdoublegetWidth(){returnwidth;}publ

namespaceEX1_4{publicclassshape{publicdoublePI=3.14;}publicclassRectangle:shape{publicintx,y,s,l;pub

classcircle{public:circle(doubleradius):_radius(radius){}~circle(void);private:double_radius;public:

以发送,楼主查收

#include#include#definePI3.14classPoint{public:Point(){x=0;y=0;}Point(floatx,floaty){this->x=x;this-

单看你这几句,好像是没错误.你把包含Pointd1=newPoint(2.0,2.0,2.0);Circlec1=newCircle(d1,2.2);这两句的类的代码全部贴出来吧

classcircle{floatradius;floatarea;public:circle(floatr){radius=r;}floatgetarea(void){area=3.14*radiu

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

#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

classPoint{public:Point();}classCircle:publicPoint{public:Circle();voidshow(){cout>>"Iamacircle">>en

classCircle{privatedoubleradius;publicCircle(){this.radius=0;}publicCircle(doubler){this.radius=r;}p

#includeclasscircle{private:intr;public:voidinput(){cout

Console.WriteLine("请输入圆的半径");intr=int.Parse(Console.ReadLine());doublecircle=2*3.14*r;doublearea=3.1

#include <iostream>using namespace std;const double PI = 3.

根据题意实现代码如下：#include <iostream>#include <cmath>#include <string>usin