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1、第1章 类和对象一、 选择题1.C 2.B 3.C 4.A 5.C6.A 7.C 8 C 9A 10 C二、阅读题1x=2,y=32x=2,y=3x!=y3Cstatic:va1=0cs1.vaI=1cs2.val=2cs1.val=4cs2.vaI=4四、改错题#include #include class person public:person(int n,char* nam,char s num=n;strcpy(name,nam; sex=s;coutConstructor called.endl; person( coutDestructor called.endl; void d
2、isplay( coutnum: endl ; coutname: endl ; coutsex: endl endl ; private:int num;char name10;char sex;int main( person s1(10010,Wang_li,f; s1.display( ; person s2(10011,Zhang_fun,m; s2.display( ; return 0;五、编程题51#include using namespace std;class CBoxpublic :CBox(double l=0,double w=0,double h=0;double
3、 area(;double volume (;private :double lengh;double width;double high;CBox:CBox(double l,double w,double hlengh=l;width=w;high=h;double CBox:area(return 2*(lengh*width+lengh*high+width*high;double CBox:volume (return lengh*width*high;void main(CBox box1(4,5,6;cout endl ; cout endl ; 5.2#include usin
4、g namespace std;class CPointpublic :CPoint(double a=0,double b=0x=a;y=b;CPoint(CPoint & px=p.x;y=p.y;void print(cout( private :double x,y;class CLinepublic:CLine(double x1=0,double y1=0,double x2=0,double y2=0:p1(x1,y1,p2(x2,y2CLine(CPoint x,CPoint y:p1(x,p2(yCLine(CLine &linp1=lin.p1;p2=lin.p2;void
5、 DrawLine(coutLine form;p1.print(;coutto;p2.print(;coutendl;void Linedel(coutdelete lineendl;void move(CPoint &x,CPoint &ycoutmove lineendl;p1=x;p2=y;private :CPoint p1,p2;void main(CPoint point1(1,5,point2(5,8,point3(20,30,point4(40,50;CLine line1(point1,point2;CLine line2(2,3,8,12;line1.DrawLine (
6、;line2.DrawLine (;line2.move(point3,point4;line2.DrawLine (;line2=line1;line2.DrawLine (;line1.Linedel (;5.3#include using namespace std;class CComplex public:CComplex(double, double;CComplex(CComplex &c; /复数类的拷贝构造函数声明double GetReal(;double GetImag(;void Print(;private:double real;double imag; CComp
7、lex:CComplex (double r=0.0, double i=0.0 real = r;imag = i;cout调用两个参数的构造函数endl;CComplex:CComplex (CComplex &c /复数类的拷贝构造函数定义real = c.real;imag = c.imag;cout调用拷贝构造函数endl;double CComplex:GetReal(return real;double CComplex:GetImag(return imag;void CComplex:Print( / 显示复数值cout ( real , imag endl;CComplex
8、 add(CComplex &x,CComplex &y /普通函数完成两个数的加法，对象作为函数参数,return CComplex(x.GetReal( +y.GetReal( ,x.GetImag (+y.GetImag (;void main(voidCComplex a(3.0,4.0, b(5.6,7.9;CComplex c(a; /调用复数类的拷贝构造函数cout a = ;a.Print(;cout b = ;b.Print(;cout c = ;c.Print(;coutc=a+bendl;c=add(a,b; cout c = ; c.Print (;5.4#includ
9、e #include using namespace std;class CStudent /类声明 public:CStudent(char *,float,float,float;CStudent(CStudent &s;CStudent(;void display(; friend float avg(CStudent &s;private:char *name;float grad3; ;CStudent:CStudent(char *na,float a,float b,float cname=new charstrlen(na+1;strcpy(name,na;grad0=a;gr
10、ad1=b;grad2=c;CStudent:CStudent(CStudent &sname=new charstrlen(s.name+1;strcpy(name,s.name;grad0=s.grad0;grad1=s.grad 1;grad2=s.grad 2;CStudent:CStudent(delete name;void CStudent:display( int i; coutname: endl ; for(i=0;i3;i+coutgradi: i endl ; float avg(CStudent &s /普通函数，需要引用私有成员，声明为学生类的友元函数return
11、(s.grad0+s.grad1 +s.grad2/3;int main( CStudent stud1(张三,79,98,82; /定义对象stud1.display(;cout 平均成绩：avg(stud1endl;return 0;5.5#include using namespace std;class CStringpublic :CString(; /缺省构造函数，初始化为空串 CString(char ch,int nRepeat;/用一个字符重复n次，初始化字符串CString(const char*psz; /用一个字符串初始化CString(CString &strings
12、er; /拷贝构造函数CString(; int GetLength( const;bool IsEmpty( const;char GetAt(int nindex const;void Setat(int nindex,char ch;void Print(;int compare(CString& string;int compare(const char* pszconst;void Vacate(;private :char *s;CString:CString(s=NULL;CString:CString(CString& stringser s=new charstrlen(st
13、ringser.s+1;if(s!=0strcpy(s,stringser.s;CString:CString(char ch,int nRepeats=new charnRepeat+1;for(int i=0;inRepeat;i+si=ch;snRepeat=0;CString:CString(const char*pszs=new charstrlen(psz+1;if(s!=0strcpy(s,psz;int CString:GetLength( const int i=0;while (si!=0i+;return i;bool CString:IsEmpty( constif(s=NULLreturn 1;elsereturn 0;vo
