定义一个矩形类,用成员函数计算面积

#include#includeclassPoint{private:\x05doublem_x;\x05doublem_y;\x05public:\x05Point()\x05{\x05\x05m_

对的,可以这样定义

Date();Date(Date&d);Date(constchar*input);Date(inty,intm=2,intd=29);voidsetDate(constchar*input);voi

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

easy~#include#includeusingnamespacestd;classComplex{private:doublereal;doubleimage;public:Complex(do

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

Java的行不,C++的不记得了.publicclassCircle{privatestaticdoublePI=3.14privatedoubleradius;publicCircle(double

#includeclassCircle{public:Circle():radius(0){}Circle(doubler):radius(r){}constdoublearea()co

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

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

#include#definePI3.14159classCircle{private:floatradius,girth,area;public:Circle(floatr=0);//构造函数（以半

#include#includeusingnamespacestd;classPoint{private:doubleX,Y;public:Point(doublex,doubley){X=x;Y=y

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

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

classDate{intyear;intmonth;intdate;publicDate(intyear,intmonth,intdate){this.month=month;this.year=y

publicclassRectangle{\x09\x09privateintw;\x09\x09privateinth;\x09\x09publicRectangle(){\x09\x09}\x09

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

classcs{publicint_w;publicint_h;puliccs(intw,inth){_w=w;_h=h;}publicintmj(){return_w*_h;}publicintzc

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