华中科技大学 类的上机答案.docx

第四章上机第一套第一题：class Rectangleprivate:double left;double top;double right;double bottom;public:Rectangle(double a=0,double b=0,double c=0,double d=0 );Rectangle();void Assign(double a,double b,double c,double d);void Show(); double getLeft()return left; double getTop()return top; double getRight()return right; double getBottom()return bottom;double Area();double Perimeter();Rectangle:Rectangle(double a,double b,double c,double d)left=a; top=b; right=c;bottom=d; void Rectangle:Assign(double a,double b,double c,double d)left=a; top=b; right=c;bottom=d;void Rectangle:Show()coutleft-top point is (left,top)n;coutright-bottom point is (left,top)n; double Rectangle:Area() return fabs(right-left)*(bottom-top); double Rectangle:Perimeter()return 4*(right-left);第二题char mid;Person:Person(char *id, char *name, char sex,int birthday,char *homeadd)strcpy(IdPerson,id);strcpy(Name,name);Sex=sex;Birthday=birthday;strcpy(HomeAddress,homeadd);Person:Person()IdPerson0=0;Name0=0;Sex=mid;Birthday=0;HomeAddress0=0;Person:Person(Person&Ps)coutendl;strcpy(IdPerson,Ps.IdPerson);strcpy(Name,Ps.Name);Sex=Ps.Sex;Birthday=Ps.Birthday;strcpy(HomeAddress,Ps.HomeAddress);第三题class Timedateprivate: int year,month,date; int hh,mm,ss;public: Timedate(int=2000,int=1,int=1);void putdate(int y,int m,int d);void puttime(int n,int m,int s);void list();Timedate:Timedate(int y,int m,int d )year=y; month=m; date=d;hh=12; mm=30; ss=0;void Timedate:putdate(int y,int m, int d)year=y; month=m; date=d;void Timedate:puttime(int h,int m,int s)hh=h; mm=m; ss=s;第四题#include#includeusing namespace std;const double PI=3.14159265;class Circleprivate:double r;double Circumference; double Area;public: Circle(double a=0); Circle(Circle &); void SetR(double R);Circle(); double GetR()return r; double GetCircumference()return Circumference; double GetAreaCircle()return Area;Circle:Circle(double a) r=a;Area=PI*r*r; Circumference=2*PI*r; Circle:Circle(Circle &cl)r=cl.r; Area=cl.Area; Circumference=cl.Circumference; void Circle:SetR(double R) r=R; Area=PI*r*r; Circumference=2*PI*r;第二套上机题目第一题；class Circleprivate:double radius;public:double area();double circumference();void Set(double r1);Circle(double r=0):radius(r);double Circle:circumference()return 2*PI*radius;void Circle:Set(double r1)radius=r1;double Circle:area()return PI*radius*radius;class Boxprivate :double length;public:void Set(double l1);Box(double l=0):length(l)double area();double circumference();double Box:circumference()return 4*length;void Box:Set(double l1)length=l1;double Box:area()return length*length;class NewStylepublic:Circle a; Box b;NewStyle(Circle a1,Box b1);double S();double L();void Set(Circle a2,Box b2);NewStyle:NewStyle(Circle a1,Box b1)a=a1;b=b1;void NewStyle:Set(Circle a2,Box b2)a=a2;b=b2;double NewStyle:S()return a.area()-b.area();double NewStyle:L()return a.circumference()+b.circumference();第二题：date:date(int Year,int Month,int Day)year=Year; month=Month; day=Day;void date:setdate(int Year,int Month,int Day)year=Year; month=Month; day=Day;int date:get_year()return year;int date:get_month()return month;int date:get_day()return day;card:card(int Book, int Reader,date Borrow_day,int Expiry ):book(Book),reader(Reader),borrow_day(Borrow_day),expiry(Expiry)date card:get_borrow_day()return borrow_day;date card:get_return_day()date return_day; return_day.setdate(borrow_day.get_year(),borrow_day.get_month(),borrow_day.get_day()+expiry);int i=return_day.get_month(),a; int year=return_day.get_year(); int day=return_day.get_day(); if(i=1|i=3|i=5|i=7|i=8|i=10|i=12) a= 31; else if(i!=2) a =30; else if(year%4=0&year%100!=0)|(year%400=0) a=29; else a=28; while(daya) i+; day-=a; if(i=1|i=3|i=5|i=7|i=8|i=10|i=12) a= 31; else if(i!=2) a =30; else if(year%4=0&year%100!=0)|(year%400