定义一个类Cat,包含一个私有成员变量weight

classRect{privateint_len;privateint_width;publicRect(intlen,intwidth){this._len=len;this._width=widt

classDate{public:Date(int=1900,int=1,int=1);voidShowDate();Dateoperator++();//前置单目运算符重载Dateoperator+

importjava.util.Date;importjavax.swing.JFrame;importjavax.swing.JTextField;publicclassTest{\x05publi

classscore{privatedoubleenglish;publicvoidsetScore(doubleenglish){this.english=english;}publicvoidpr

#include"stdio.h"#include"graphics.h"#definePI3.1415926;classcircle{public:voidset_x(){scanf("%d%d%d

#include"stdafx.h"#include#includeusingnamespacestd;classPoint{public:Point():m_x(0),m_y(0)//无参的构造函数

程序如下：publicclassPoint{\x05doublex,y;\x05doubled;\x05Point(doublea,doubleb){\x05\x05x=a;\x05\x05y=b;\

classComplex{doublereal;doubleimaginary;public:Complex(double&r=0,double&i=0):real(r),imaginary(i){}

#includeusingnamespacestd;classcircle{private:doubleradius;public:circle(doubler=0.0);voidinput();do

#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

用什么语言编?

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

publicclassScore{privateintnum;privatefloatmath;privatefloatenglish;publicfloatgetMath(){returnmath;

#includeusingnamespacestd;classcat{public:cat();virtual~cat();public:floatweight;staticinthowmany

publicinterfaceArea{\x05publicdoublecalculateArea();}publicclassMyRectangle{doublelength;doublewidth

#include#includeclasslocation{private:floatx;floaty;floata;public:location(){x=0;y=0;}location(float

classCat{privateintnumofcats;publicintgetnumofcats(){returnnumofcats;}}

看书运算符重载,拷贝构造及赋值为私有

#include"iostream.h"classX;classZ{public:voidg(X&p);};classY{public:voidf(X&p);};classX{inti;public:

#include<stdio.h>voidmain(){intdata1,data2;charop;scanf("%d%c%d",&data1,&op,&data2);if(op=='+'