《C++面向对象程序设计》答案-第三章--谭浩强-清华大学出版社.docx

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1、#include using namespace std;class Datepublic:Date(intjntjnt);Date(intjnt);Date(int);Date();void display();private:int month;int day;int year;；Date:Date(int m,int d,int y):month(m),day(d),year(y) )Date:Date(int m,int d):month(m)/day(d) year=2023;Date:Date(int m):month(m)day=l;year=2O23;Date:Date()mo

2、nth=l;day=l;year=2O23;void Date:display()coutmonth，7，,day，7yearendl;int main()(Date dl(10,13,2023);Date d2(12,30);Date d3(10);Date d4;dl.display();d2.display();Compare(numtype a,numtype b);numtype max();numtype min();private:numtype x,y;；template Compare:Compare(numtype a,numtype b)x=a;y=b;template

3、numtype Compare:max()return (xy)?x:y;template numtype Compare:min()return (xy)?x:y;int main()Compare cmpl(3,7);coutcmpl.max() is the Maximum of two integer numbers.endl;coutcmpl.min() is the Minimum of two integer numbers.endlendl;Compare cmp2(45.78,93.6);coutcmp2.max() is the Maximum of two float n

4、umbers.endl;coutcmp2.min() is the Minimum of two float numbers.endlendl;Compare cmp3(aA)；coutcmp3.max() is the Maximum of two characters.endl;coutcmp3.min() is the Minimum of two characters.nendl; return 0;)d3.display();d4.display();return 0;#include using namespace std; class Datepublic:Date(int=l,

5、int=l,int=2023);void display();private:int month;int day;int year;；Date:Date(int m,int d,int y):month(m),day(d),year(y) ()void Date:display()coutmonth/，day，7，,yearendl;int main() (Date dl(10,13,2023);Date d2(12,30);Date d3(10);Date d4;dl.display();d2.display();d3.display();d4.display();return 0;)#in

6、clude using namespace std; class Studentpublic:Student(int n,float s):num(n),score(s)void display();private:int num;float score;；void Student:display()coutnum scoreendl;int main()Student stud5=Student(101278.5),Student(102,85.5),Student(103,98.5),Student(104,100.0),Student(105,95.5);Student *p=stud;

7、forfint i=0;idisplay();return 0;ttinclude using namespace std;class Studentpublic:Student(int n,float s):num(n),score(s)int num;float score;；void main()Student stud5=Student(101,78.5),Student(102,85.5),Student(103,98.5),Student(104,100.0),Student(105,95.5);void max(Student* );Student *p=&stud0;max(p

8、);)void max(Student *arr)float max_score=arr0.score;int k=0;forfint i=l;imax_score) max_score=arri.score;k=i; coutarrk.num Hmax_scoreendl;#include using namespace std;class Studentpublic:Student(int n,float s):num(n),score(s)void change(int n,float s) num=n;score=s;void display()coutnum scoreendl;pr

9、ivate:int num;float score;；int main()Student stud(101,78.5);stud.display();stud.change(101,80.5);stud.display();return 0;)7:解法一#include using namespace std;class Studentpublic:Student(int n,float s):num(n),score(s)void change(int n,float s) num=n;score=s;void display() coutnum scoreendl;可改为:void dis

10、play() const coutnum scoreendl; private:int num;float score;；int main()const Student stud(101,78.5);stud.displayf);/stud.change(101,80.5);stud.display();return 0;解法二：ttinclude using namespace std;class Studentpublic:Student(int n,float s):num(n),score(s)void change(int n,float s) const num=n;score=s

11、;void display() const coutnum scoreendl;private:mutable int num;mutable float score;；int main()const Student stud(101,78.5);stud.display();stud.change(101,80.5);stud.display();return 0;)解法三：#include using namespace std;class Studentpublic:Student(int n,float s):num(n),score(s)void change(int n,float

12、 s) num=n;score=s;void display() coutnum scoreendl;private:int num;float score;；int main()Student stud(101,78.5);Student *p=&stud;p-display();p-change(101,80.5);p-display();return 0;8：#include using namespace std;class Studentpublic:Student(int n,float s):num(n),score(s)void change(int n,float s) nu

13、m=n;score=s;void display() coutnum scoreendl;private:int num;float score;；int main()Student stud(101,78.5);void fun(Student&);fun(stud);return 0;)void fun(Student &stu)stu.displayO;stu.change(101z80.5);stu.display();)9：#include using namespace std;class Productpublic:Product(int n,int q,float p):num

14、(n),quantity(q),pnce(p);void totalf);static float average();static void display();private:int num;int quantity;float price;static float discount;static float sum;static int n;；void Product:total()float rate=1.0;if(quantity10) rate=0.98*rate;sum=sum+quantity*price*rate*(l-discount);n=n+quantity;)void

15、 Product:display()coutsumendl;coutaverage()endl;)float Product:average()return(sum/n);float Product:discount=0.05;float Product:sum=0;int Product:n=0;int main()|Product Prod3=Product(10L5,23.5),Product(102,12,24.56),Product(103,100,21.5)；for(int i=0;i3;i+)Prodi.total();Product:display();return 0;10：

16、#include using namespace std;class Date;class Timepublic:Time(int,int,int);friend void display(const Date &,const Time &);private:int hour;int minute;int sec;Time:Time(int h,int m,int s)hour=h;minute=m;sec=s;class Datepublic:Date(intjntjnt);friend void display(const Date &,const Time &);private:int

17、month;int day;int year;；Date:Date(int m,int d,int y)month=m;day=d;year=y;void display(const Date &d,const Time &t)(coutd.month，7d.day，7d.yearendl;coutt.hour,:t.minute:t.secendl;int main()(Time tl(10,13,56);Date dl(12,25,2023);display(dl,tl);return 0;)11：ttinclude using namespace std;class Time;class

18、 Datepublic:Datefintjntjnt);friend Time;private:int month;int day;int year;；Date:Date(int mjnt d,int y):month(m),day(d),year(y)class Timepublic:Time(int,int,int);void display(const Date &);private:int hour;int minute;int sec;；Time:Time(int hjnt mjnt s):hour(h),minute(m),sec(s)void Time:display(const Date &d)(coutd.month，7d.day，7d.yearendl;couthour:,minute:secendl;int main()(Time tl(10,13,56);Date dl(12z25,2023);tl.display(dl);return 0;)12：#include using namespace std;templateclass Comparepublic: