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.
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就是类里面定义的一个字符串,数值,list,map等这样的一个变量或者常量/***这是Manager类*/publicclassManager{Stringusername="张三";//定义Mana
类是使用关键字class声明的,如下面的示例所示:复制代码classTestClass{//Methods,properties,fields,events,delegates//andnestedc
classCircle{\x09privatedoubler;\x09publicvoidsetR(doubler)\x09{\x09\x09this.r=r;\x09}\x09publicdoubl
#include#includeusingnamespacestd;classCircle{doubler,Area,Circumference;public:Circle(doublea=0);Ci
#include"string.h"#include"iostream.h"classcomplex{private:floatx,y;public:complex(floatx,floaty){th
classCircle{public:Circle(intnr){r=nr;}Circle(){}public:intr;intArea(){return3.14*r*r;}};classB{publ
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
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
publicclassTest{\x09publicstaticvoidmain(String[]args){\x09\x09Student[]students=newStudent[]{\x09\x
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
publicclassWb{doublei=5.0;doublefindArea(){returnradius*radiu*3.14159;}publicstaticvoidmain(string[]