定义一个box类,数据成员包括length.width

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

#include <iostream>using namespace std;class Box {\x09float leng

C#的classProgram{staticvoidMain(string[]args){Bookb=newBook(1,"放飞思想",(decimal)100.00);b.disp();Consol

#include#includeusingstd::cout;usingstd::cin;usingstd::endl;usingstd::string;classBook{public:Book(s

假设是控制台Dev#include <stdio.h>#include <stdlib.h>class Book{private: &n

//ConsoleApplication4.cpp:定义控制台应用程序的入口点.//#include"stdafx.h"#includeusingnamespacestd;classcMyRect{p

classRecangle{private:intwidth;intlength;public:Recangle(){width=0;length=0;};Recangle(intw,inth){wi

classCircle{public:Circle(intnr){r=nr;}Circle(){}public:intr;intArea(){return3.14*r*r;}};classB{publ

#includeusingnamespacestd;classRectangle{protected:doublelength,width;public:Rectangle(doublea,doubl

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

技术不好,所以不能完全按照你的意思来答题,不知道你是不是想实现这样的结果：1、创建一个类,将类的名称修改为：Box2、在Box类中,加入如下代码：PublicLengthAsDoublePublicW

classBox{doublelenth=0;doubleheight=0;doublewidth=0;publicdoublevolume(){returnlenth*height*width;}p

classTriangle{private:\x05doublea;\x05doubleb;\x05doublec;public:\x05Triangle():a(0),b(0),c(0){}\x05

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

classComplex{public:Complex(){real=0;imag=0;}//定义结构函数Complex(doubler,doublei){real=r;imag=i;}//构造函数重

C++实现的复数类,代码如下//complex.cpp#includeusingnamespacestd;classcomplex{//复数类public:complex(doubler=0.0,do

classline:publicpoint{public:pointm_start;pointm_end;line();line();line(pointstart,pointend):m_start

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

classCRect{public:CRect(intx,inty,intWidth,intHeight);voidSetSize(intWidth,intHeight);voidSetPos(int

1)Youdon'tneedamemberfunction2)Youdon'tevenneedamembervariable3)Aclasscanbeempty再问：ok，Iunderstand，th