C--程序设计教程--面向对象分册(郑秋生)完整答案(共45页).doc
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1、精选优质文档-倾情为你奉上第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
2、.endl; void display( 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,doub
3、le h=0;double 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
4、#include using 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;p
5、2=lin.p2;void 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;lin
6、e1.DrawLine (;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;doubl
7、e imag; CComplex: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
8、endl;CComplex 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
9、 (;5.4#include #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,
10、na;grad0=a;grad1=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
11、类的友元函数return (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(CSt
12、ring &stringser; /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
13、charstrlen(stringser.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:IsEmp
14、ty( constif(s=NULLreturn 1;elsereturn 0;void CString:Vacate(s0=0;coutNow have vacated string.1&nindex1&nindex=GetLength(+1s nindex-1=ch; void CString:Print(cout0return 1;else if(strcmp(s,string.s0return 1;else if(strcmp(s,psz0return -1;else return 0;CString:CString(/coutendl析构: endl ; if(s!=NULLdele
15、tes;void main( char a4=y;char b4;CString c1(Hellow,c2(c1;coutStringc1 is: ; c1.Print(;coutendl;coutStringc2 is: ; c2.Print(;coutendl;CString c3(b,3;coutStringc3 is: ; c3.Print(;coutendl;cout*以下是对串的基本操作*endl;int num=c1.GetLength(;char ch;coutc1的长度是: endl ; ch=c1.GetAt(5;cout获得字符串c1中第5个字符是:chendl;cout
16、下面是插入字符串c1中一个特殊字符dendl;c1.Setat(5,d;cout插入后字符串c1变为: ;c1.Print(;/coutendl;if(c1.IsEmpty(=1coutString is empty.endl;elsecoutString isnt empty.endl;cout下面是判断字符串c1清空endl;c1.Vacate(;cout清空后输出字符串c1: n;c1.Print(;cout字符串已被清空endl;cout请按任意键继续b;/cout*以下是对串的赋值*endl;CString c5=c2;coutString c5=c2 is: ;c5.Print(;
17、coutendl;cout*以下是对串的比较*endl;int temp=pare(c3;cout以下比较c2与c30coutStringc3endl;else if(temp0coutStringc2 endl ; elsecoutStringc9=Stringc4endl;coutendl;cout以下比较c2与任意字符串Goodboy!0coutGoodboy!endl;else if(pare(Goodboy!0coutStringc2Goodboy!endl;elsecoutStringc2 =Goodboy!endl;第二章 继承和派生一、 选择题1D 2.B 3. D一、 阅读程
18、序题四、编程题4.1 #include #include#define PAI 3.14class Circle public:Circle(r=0;Circle (double dr=d;double area(return(PAI*r*r;void display1(cout桌子的面积: endl ; private:double r;class Tablepublic:Table(heig=0;Table (double h heig=h;void display2(cout桌子的高度:heigendl;private:double heig;class Roundtable : pub
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