创建一个圆(Circle)类,求圆的面积.

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!

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:

importjava.util.Scanner;publicclassCircle{\x05privatedoubleradius;publicCircle(){}publicCircle(doubl

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;classCircle{public:Circle(doubler=0):radius(r){}doubleArea(){return3.14*ra

classCircle{intr,c,s;c=circle(r);s=square(r);}intcircle(intr){intc;c=2*3.1415926*r;return(c);}intsqu

#includeusingstd::cout;usingstd::endl;#definePI3.14159structpoint{\x09intx,y;\x09point(int_x,int_y):

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

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

#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

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