c++程序的设计谭浩强课后习题答案完整版.docx

1、c+程序的设计谭浩强课后习题答案完整版第八章 #include using namespace std; class Time public: /成员改为公用的 int hour; int minute; int sec; ; Time t; void set_time(void) /在 main 函数之前定义 cint.hour; cint.minute; cint.sec; void show_time(void) /在 main 函数之前定义 coutt.hour:t.minute:t.secendl; int main() set_time(); show_time(); return

2、 0; 8.2 题 #include using namespace std; class Time public: void set_time(void) cinhour; cinminute; cinsec; void show_time(void) couthour:minute:secendl; private: int hour; int minute; int sec; ; Time t; int main() t.set_time(); t.show_time(); return 0; 8.3 题 #include using namespace std; class Time

3、public: void set_time(void); void show_time(void); private: int hour; int minute; int sec; ; void Time:set_time(void) cinhour; cinminute; cinsec; void Time:show_time(void) couthour:minute:secendl; Time t; int main() t.set_time(); t.show_time(); return 0; 8.4 题 /xt8-4.h(student.h) class Student publi

4、c: void display( ); void set_value(); private: int num; char name20; char sex ; ; 8.4 题 /xt8-4-1.cpp(main.cpp) #include using namespace std; #include xt8-4.h int main() Student stud; stud.set_value(); stud.display(); return 0; 8.4 题另一解 /xt8-4-2.cpp(即 student.cpp) #include xt8-4.h /在此文件中进行函数的定义 #incl

5、ude using namespace std; /不要漏写此行 void Student:display( ) coutnum:numendl; coutname:nameendl; coutsex:sexnum; cinname; cinsex; 8.5 题 /xt8-5.h(arraymax.h) class Array_max public: void set_value(); void max_value(); void show_value(); private: int array10; int max; ; 8.5 题 /xt8-5-1.cpp(file1.cpp) #incl

6、ude #include xt8-5.h int main() Array_max arrmax; arrmax.set_value(); arrmax.max_value(); arrmax.show_value(); return 0; 8.5 题 /xt8-5-2.cpp(arraymax.cpp) #include using namespace std; #include xt8-5.h void Array_max:set_value() int i; for (i=0;iarrayi; void Array_max:max_value() int i; max=array0; f

7、or (i=1;imax) max=arrayi; void Array_max:show_value() coutmax=maxendl; 8.6 题 #include using namespace std; class Box public: void get_value(); float volume(); void display(); public: float lengh; float width; float height; ; void Box:get_value() coutlengh; cinwidth; cinheight; float Box:volume() ret

8、urn(lengh*width*height); void Box:display() coutvolume()endl; int main() Box box1,box2,box3; box1.get_value(); coutvolmue of bax1 is ; box1.display(); box2.get_value(); coutvolmue of bax2 is ; box2.display(); box3.get_value(); coutvolmue of bax3 is ; box3.display(); return 0; 8.6 题另一解 #include using

9、 namespace std; class Box public: void get_value(); void volume(); void display(); public: float lengh; float width; float height; float vol; ; void Box:get_value() coutlengh; cinwidth; cinheight; void Box:volume() vol=lengh*width*height; void Box:display() coutvolendl; int main() Box box1,box2,box3

10、; box1.get_value(); box1.volume(); coutvolmue of bax1 is ; box1.display(); box2.get_value(); box2.volume(); coutvolmue of bax2 is ; box2.display(); box3.get_value(); box3.volume(); coutvolmue of bax3 is ; box3.display(); return 0; 9.2 题 #include using namespace std; class Date public: Date(int,int,i

11、nt); Date(int,int); 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=2005; Date:Date(int m):month(m) day=1; year=2005; Date:Date() month=1; day=1; year=2005; void Date:display(

12、) coutmonth/day/yearendl; int main() Date d1(10,13,2005); Date d2(12,30); Date d3(10); Date d4; d1.display(); d2.display(); d3.display(); d4.display(); return 0; 9.3 题 #include using namespace std; class Date public: Date(int=1,int=1,int=2005); void display(); private: int month; int day; int year;

13、; Date:Date(int m,int d,int y):month(m),day(d),year(y) void Date:display() coutmonth/day/yearendl; int main() Date d1(10,13,2005); Date d2(12,30); Date d3(10); Date d4; d1.display(); d2.display(); d3.display(); d4.display(); return 0; 9.4 题 #include using namespace std; class Student public: Student

14、(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(101,78.5),Student(102,85.5),Student(103,98.5), Student(104,100.0),Student(105,95.5); Student *p=stud; for(int i=0;idisplay(); return 0; 9.5 题 #

15、include using namespace std; class Student public: 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); void max(Student *

16、arr) float max_score=arr0.score; int k=0; for(int i=1;imax_score) max_score=arri.score;k=i; coutarrk.num max_scoreendl; 9.6 题 #include using namespace std; class Student public: Student(int n,float s):num(n),score(s) void change(int n,float s) num=n;score=s; void display()coutnum scoreendl; private:

17、 int num; float score; ; int main() Student stud(101,78.5); stud.display(); stud.change(101,80.5); stud.display(); return 0; 9.7 题 #include using namespace std; class Student public: Student(int n,float s):num(n),score(s) void change(int n,float s) num=n;score=s; void display() coutnum scoreendl; /

18、可改为 :void display() const coutnum scoreendl; private: int num; float score; ; int main() const Student stud(101,78.5); stud.display(); /stud.change(101,80.5); stud.display(); return 0; 9.7 题另一解 #include using namespace std; class Student public: Student(int n,float s):num(n),score(s) void change(int

19、 n,float s) const num=n;score=s; 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; 9.7 题另一解 Student(int n,float s):num(n),score(s) void change(int n,float

20、s) num=n;score=s; void display() coutnum scoredisplay(); p-change(101,80.5); p-display(); return 0; A Student(int n,float s):num(n),score(s) void change(int n,float s) num=n;score=s; void display() coutnum scoredisplay(); p-change(101,80.5); p-display(); return 0; B Student(int n,float s):num(n),sco

21、re(s) void change(int n,float s) num=n;score=s; void display() constcoutnum scoredisplay(); stud.change(101,80.5); p-display(); return 0; Student(int n,float s):num(n),score(s) void change(int n,float s) num=n;score=s; void display() coutnum scoredisplay(); p-change(101,80.5); p-display(); return 0;

22、 9.8 题 Student(int n,float s):num(n),score(s) void change(int n,float s) num=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.display(); stu.change(101,80.5); stu.displ

23、ay(); 9.9 题 #include using namespace std; class Product public: Product(int n,int q,float p):num(n),quantity(q),price(p); void total(); static float average(); static void display(); private: int num; int quantity; float price; static float discount; static float sum; static int n; ; void Product:to

24、tal() float rate=1.0; if(quantity10) rate=0.98*rate; sum=sum+quantity*price*rate*(1-discount); n=n+quantity; void 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= Prod

25、uct(101,5,23.5),Product(102,12,24.56),Product(103,100,21.5) ; for(int i=0;i3;i+) Prodi.total(); Product:display(); return 0; 9.10 题 #include using namespace std; class Date; class Time public: 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 Date public: Date(int,int,int); friend void display(const Date &,const Time &); private: int month; int day; int year; ; Da