定义一个圆类,要求属性为圆的半径,操作为计算圆的周长和面积

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

//Complex.hclassComplex{private:floatReal;floatImag;public:Complex();Complex(floatRl,floatIm);Comple

你的构造函数里面的赋值写反了应该是real=r;imag=i;.粗心问题.亲=.=

以下程序,直接拿去交作业吧,都测试过了.//圆周长面积#include#definepi3.14159classcircle{public:voidsetRadius(){std::cout

#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

#includeusingnamespacestd;classPoint{private:intx;inty;public:Point(){}Point(intx,inty){this->x=x;th

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

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

#includestructpoint{floatx,y;};doublearea(pointp1,pointp2){doublea;a=sqrt((p2.x-p1.x)*(p2.x-p1.x)*(p

classDate{intyear;intmonth;intday;voidDate(){year=2000;month=1;day=1;}};Datexxx;...

#include#include#includeusingnamespacestd;classTriangle{inta,b,c;public:doubleArea(){doubles=(a+b+c)

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

sorry我不会啊