c++面向对象程序设计课后习题答案.docx

1、c+面向对象程序设计课后习题答案第一章5:#include using namespace std;int main() coutThisis; coutaC+; coutprogram.endl; return 0;6:#include using namespace std;int main() int a,b,c; a=10; b=23; c=a+b; couta+b=; coutc; coutendl; return 0;7:#include using namespace std;int main() int a,b,c; int f(int x,int y,int z); cina

2、bc; c=f(a,b,c); coutcendl; return 0;int f(int x,int y,int z) int m;if (xy) m=x; else m=y; if (zm) m=z; return(m); 8: #include using namespace std;int main() int a,b,c; cinab; c=a+b; couta+b=a+bendl; return 0; 9: #include using namespace std;int main()int add(int x,int y); int a,b,c; cinab; c=add(a,b

3、); couta+b=cendl; return 0;int add(int x,int y)int c; c=x+y; return(c);10:#include using namespace std;int main()void sort(int x,int y,int z);int x,y,z; cinxyz; sort(x,y,z); return 0;void sort(int x, int y, int z) int temp; if (xy) temp=x;x=y;y=temp; 2-4-12-4-22-5-12-5-2Box box1Box box1core; int k=0

4、; for(int i=1;imax_score) max_score=arri.score;k=i; coutarrk.num max_scoreendl;6:#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; private: int num; float score; ;int main()Student stud(

5、101,; (); (101,; (); return 0;7: 解法一#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; otal(); Product:display(); return 0; 10：#include using namespace std;class Date;class Time public:

6、 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; ;Date:Date(i

7、nt m,int d,int y) month=m; day=d; year=y; void display(const Date &d,const Time &t) cout/endl; cout:endl; int main() Time t1(10,13,56); Date d1(12,25,2004); display(d1,t1); return 0; 11：#include using namespace std;class Time;class Date public: Date(int,int,int); friend Time;private: int month; int

8、day; int year; ;Date:Date(int m,int d,int y):month(m),day(d),year(y) class Time public: Time(int,int,int); void display(const Date &); private: int hour; int minute; int sec; ;Time:Time(int h,int m,int s):hour(h),minute(m),sec(s) void Time:display(const Date &d) cout/endl; couthour:minute:secendl; i

9、nt main() Time t1(10,13,56); Date d1(12,25,2004); (d1); return 0;12：#include using namespace std;templateclass Compare public: 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 numtype Compare:max() retur

10、n (xy)x:y;template numtype Compare:min() return (xy)x:y;int main()Compare cmp1(3,7); cout() is the Maximum of two integer numbers.endl; cout() is the Minimum of two integer numbers.endlendl; Compare cmp2,; cout() is the Maximum of two float numbers.endl;cout() is the Minimum of two float numbers.end

11、lendl; Compare cmp3(a,A); cout() is the Maximum of two characters.endl; cout() is the Minimum of two characters.endl; return 0;第四章1:#include using namespace std;class Complex public: Complex()real=0;imag=0; Complex(double r,double i)real=r;imag=i; double get_real(); double get_imag(); void display()

12、; private: double real; double imag; ;double Complex:get_real()return real;double Complex:get_imag()return imag;void Complex:display()cout(real,imagi)endl;Complex operator + (Complex &c1,Complex &c2) return Complex()+(),()+();int main()Complex c1(3,4),c2(5,-10),c3; c3=c1+c2; coutc3=; (); return 0;2:

13、#include using namespace std;class Complex public: Complex()real=0;imag=0; Complex(double r,double i)real=r;imag=i; Complex operator+(Complex &c2); Complex operator-(Complex &c2); Complex operator*(Complex &c2); Complex operator/(Complex &c2); void display(); private: double real; double imag; ;Comp

14、lex Complex:operator+(Complex &c2)Complex c; =real+; =imag+; return c;Complex Complex:operator-(Complex &c2)Complex c; =; =; return c;Complex Complex:operator*(Complex &c2)Complex c; =real*; =imag*+real*; return c;Complex Complex:operator/(Complex &c2)Complex c; =(real*+imag*/*+*; =(imag*/*+*; retur

15、n c;void Complex:display()cout(real,imagi)endl;int main()Complex c1(3,4),c2(5,-10),c3; c3=c1+c2; coutc1+c2=; (); c3=c1-c2; coutc1-c2=; (); c3=c1*c2; coutc1*c2=; (); c3=c1/c2; coutc1/c2=; (); return 0;3:#include ,president,135 Beijing Road,Shanghai,(021),; ( ); return 0;10：#include #include using nam

16、espace std;class Teacher um stafi.name stafi.age stafi.payendl; (char *)&stafi,sizeof(stafi); coutplease input data you want insert:endl; for(i=0;i; (0,ios:end); (char *)&staf1,sizeof(staf1); (0,ios:beg); for(i=0;i7;i+)(char *)&stafi,sizeof(stafi); coutstafi.num stafi.name stafi.age stafi.payendl; b

17、ool find; coutnum; while(num) find=false; (0,ios:beg); for(i=0;i7;i+) (char *)&stafi,sizeof(stafi); if(num=stafi.num) m=(); coutnum is No.m/sizeof(staf1)endl; coutstafi.num stafi.name stafi.age stafi.payendl; find=true; break; if(!find) coutcant find numendl; coutnum; (); return 0;6：解法一#include #inc

18、lude using namespace std;struct studentint num; char name20; double score;int main()student stud3=1001,Li,78,1002,Wang,1004,Fun,90,stud13; char c50; int i; ostrstream strout(c,50); for(i=0;i3;i+) stroutstudi.num studi.name studi.score ; stroutends; coutarray c:endlcendlendl; istrstream strin(c,50);

19、for(i=0;istud1i.numstud1i.namestud1i.score; coutdata from array c to array stud1:endl; for(i=0;i3;i+) coutstud1i.num stud1i.name stud1i.scoreendl; coutendl; return 0;6：解法二#include #include using namespace std;struct studentint num; char name20; double score;int main()int i; student stud3=1001,Li,78,

20、1002,Wang,1004,Fun,90,stud13; char c50; strstream strio(c,50,ios:in|ios:out); for(i=0;i3;i+) striostudi.num studi.name studi.score ; strioends; coutarray c:endlcendlendl; for(i=0;istud1i.numstud1i.namestud1i.score; coutdata from array c to array stud1:endl; for(i=0;i3;i+) coutstud1i.num stud1i.name

21、stud1i.scoreendl; coutendl; return 0;第八章1:#include #include using namespace std;double q(double,double,double);void main()double a,b,c,p,x1,x2; coutabc; p=-b/(2*a); try x1=p+q(a,b,c); x2=p-q(a,b,c); coutx1=x1endlx2=x2endl; catch(double d) couta=a,b=b,c=c,disc=d,error!endl; coutendendl;double q(doubl

22、e a,double b,double c) double disc; disc=b*b-4*a*c; if (disc0) throw disc; return sqrt(disc)/(2*a); 2:#include #include using namespace std;class Student public: Student(int n,string nam) coutconstructor-nendl; num=n;name=nam; Student()coutdestructor-numendl; void get_data();private: int num; string

23、 name; ;void Student:get_data() if(num=0) throw num; else coutnum nameendl; coutin get_data()endl; void fun()Student stud1(1101,tan); (); try Student stud2(0,Li); (); catch(int n) coutnum=n,error!endl;int main()coutmain beginendl; coutcall fun()endl; fun(); coutmain endendl; return 0;3:/main file#in

24、clude using namespace std;#include #include using namespace std;using namespace student1;int main() Student stud1(1001,Wang,18,123 Beijing Road,Shanghua); (); student2:Student stud2(1102,Li,f,; (); return 0; /，文件名为#include namespace student1 class Student public: Student(int n,string nam,int a,string addr) num=n;name=nam;age=a;address=addr; void show_data(); private: int num; string name; int age; string address; ; void Student:show_data() coutnum:num name:name age:age address:addressendl;