C 例题：第二部分

例5-1

#includeHstdafx.hn

#include"iomanip"

#include"iostream"

usingnamespacestd;

#include"string.h"

#include"student.h"

classStudent

(

private:

char*name;

intstu_no;

floatscore;

staticinttotal;//定义静态数据成员

public:

Student(char*na,intno,floatsco);

voidPrint();

);

intStudent:rtotal=0;〃初始化静态数据成员

intmain()

(

Students1(“张明”,1,90);

sl.Print();

Students2(“王兰”,2,95);

s2.Print();

Students3(“于敏”,3,87);

s3.Print();

return0;

)

Student::Student(char*na,intno,floatsco)

(

name=newchar[strlen(na)+l];

strcpy(name,na);

stu_no=no;

score=sco;

total++；

)

voidStudent::Print()

cout<v"第"<vtotal<<"个学生："«name«setw(4)«stu_no<<setw(4)«score

«endl;

cout«"总人数是：u«total«endl;

)

第1个学生：张明190

总人数：1

第2个学生：王兰295

总人数：2

第3个学生：于敏387

总人数：3

例5-2

#include"stdafx.h"

#include"iostream"

usingnamespacestd;

include"a.h"

classA

(

private:

staticinta;

intb;

public:

A(inti,intj);

voidshow();

)；

intA::a;

intmain()

(

Ax(l,l);

x.show();

Ay(2,2);

y.show();

x.show();

return0;

)

A::A(inti,intj)

(

a=i;

b=j；

}

voidA::show()

cout«nThisisstatica:n«a«endl;

cout«nThisisnon-staticb:n«b«endl;

Thisisstatica:1

Thisisnon-staticb:1

Thisisstatica:2

Thisisnon-staticb:2

Thisisstatica:2

Thisisnon-staticb:1

例5-3

#include"stdafx.h'1

#include"iomanip"//employee.cpp

#include"iostream"

usingnamespacestd;

#include"employee.h"

classEmployee{//employee.h

private:

char*name;

intnumber;

staticinttotal;

public:

Employee();

staticvoidPrint();

voidPrintlnfo();

)；

intEmployee::total=0;

intmain()

(

Employee::Print();//在未定义对象之前就可以通过类名访问静态成员

函数

Employees[3];

inti;

cout«endl;

for(i=0;i<3;i++)

s[i].Printinfo();

Employee::Print();

return0;

Employee::Employee()

{

name二newchar[10];

cout<<"输入职工姓名和编号"<<endl;

cin»name»number;

total++;

voidEmployee::Print()

(

coutvvendkv”总人数：n«total«endl;

}

voidEmployee::PrintInfd()

(

cout<<"姓名："v<name«setw(7)vv”编号：n«number«endl;

)

总人数：0

输入职工姓名和编号

sun1

输入职工姓名和编号

wang2

输入职工姓名和编号

li3

姓名：sun编号：1

姓名：wang编号：2

姓名：li编号：3

总人数：3

例5-4

#include"stdafx.h'1

#include"iomanip'*//employee.cpp

#include"iostream"

usingnamespacestd;

#include"employee.h"

classEmployee{//employee.h

private:

char*name;

intnumber;

staticinttotal;

public:

Employee();

staticvoidPrint(Employee);

);

intEmployee::total=0;

intmain()

Employees;

Employee::Print(s);

return0;

)

Employee::Employee()

(

name=newchar[10];

cout«"输入职工姓名和编号"<<endl;

cin»name»number;

total++;

)

voidEmployee::Print(Employeea)

(

coutvVendlvv”姓名：”《<<setw(7)v<”编号：M«a.number«endl;

cout«”总人数：H«total«endl;

)

输入职工姓名和编号

sun1

姓名：sun编号：1

总人数：1

例5-5

#include"stdafx.h',

#include"iostream"//static.cpp

usingnamespacestd;

#include"obj.h"

classObj//obj.h

(

private:

charch;

public:

Obj(charc);

~Obj();

);

voidf();

voidg();

ObjA('A');〃定义全局对象A

intmain()

(

cout«ninsidemain()n«endl;

f();

f();

g();

cout«noutsidemain()u«endl;

return0;

)

Obj::Obj(charc):ch(c)

(

cout«Mconstruct.......n«ch«endl;

)

Obj:-Obj()

(

cout«ndestruct."«ch«endl;

)

voidf()

(

staticObjB(B);

)

voidg()

(

staticObjC(C);

)

construct......A

insidemain()

construct......B

construct......C

outsidemain()

destruct.......C

destruct.......B

例5-6

#include"stdafx.h"

#include"iostream"//test.cpp

usingnamespacestd;

#includentest.h"

classTest{//test.h

private:

inta;

public:

voidfl();

voidf2();

intmain()

Testtl;

tl.f2();

tl.flO;

return0;

)

voidTest::fl()

(

f2()；〃调用类中的成员函数f2

cout«a«endl;〃使用类中的成员变量a

}

voidTest::f2()

(

a=100;

100

例5-7

#include"stdafx.h"

#include"iostream"//obj.cpp

usingnamespacestd;

#include"obj.h"

classObj//obj.h

(

private:

charch;

public:

Obj(charc);

〜Obj();

);

voidf();

ObjA('A');〃定义全局对象A

intmain()

cout«Minsidemain()n«endl;

f()；

f()；

cout«Houtsidemain()n«endl;

return0;

)

Obj::Obj(charc):ch(c)

(

cout«nconstruct.n«ch«endl;

Obj::~Obj()

cout«"destruct........"«ch«endl;

)

voidf()

(

staticObjB('B');

ObjC(C。

)

construct........A

insidemain()

construct........B

construct........C

destruct........C

construct........C

destruct.......C

outsidemain()

destruct.......B

例5-8

#include"stdafx.h"

#include"iostream'1//test.cpp

#include"string"

usingnamespacestd;

#include"test.hn

namespaceA//test.h

charuser_name[]=HnamespaceA”;

voidshowname()

(

cout«user_name«endl;

)

)

namespaceB

(

stringuser_name="namespaceB”；

voidshowname()

cout«user_name«endl;

intmain()

(

A::showname();〃用命名空间限制符访问函数showname()

B::showname();〃用命名空间限制符访问函数showname()

strcpy(A::user_name,”good");〃用命名空间限制符访问变量user_name

A::showname();

return0;

)

namespaceA

namespaceB

good

例6-1

#include"stdafx.h"

#includeniomanipn//point.cpp

#include"iostream"

usingnamespacestd;

#include'^string.h^^

#include"student.h”

classPoint//point.h

(

private:

intx,y;

public:

Point(inti=0,intj=0);

Pointoperator-();

voidprint();

);

intmain()

(

Pointobi(1,2);

cout«nob1:"«endl;

obl.print();

cout«n-ob1:M«endl;

ob1.operator-();〃显示调用

//ob1=-ob1;//隐式调用

obl.print();

return0;

Point::Point(inti,intj)

x=i;

y=j;

)

voidPoint::print()

(

cout«l,(x,y)n«setw(5)«,,(n«x«",',«y«n),,«endl;

}

PointPoint::operator-()

x=-x;

y=-y;

return*this;

obi:

(x,y)(1,2)

-obi:

(x,y)

例6-2

#includeMstdafx.h"

#include"iostream"//str.cpp

usingnamespacestd;

#includenstring.hn

#include"str.h"

constintMAXSIZE=20;//str.h：存放字符串的最大长

度

classString

(

private:

charbufferfMAXSIZE];

intlength;

public:

String(char*in_str);

StringO;

Stringoperator+(char*append_str);〃重载"+”运算符

voidShowStringO;

)；

intmain()

(

Stringtitle(nC/C++”)；

title=title+"Program”；〃隐式调用

//title=title.operator+(nProgramn);〃显式调用

title.ShowStringO;

return0;

)

String::String(char*in_str)

(

strcpy(buffer,in_str);

length=strlen(buffer);

)

String::String()

(

length=0;

)

StringString::operator+(char*append_str)

(

Stringtemp;

inttemplen;

templen=strlen(buffer)+strlen(append_str)+1;〃计算相加后的字符串的总长度

if(templen>MAXSIZE)

(

cout«nStringistoolarge!n«endl;

strcpy(temp.buffer,buffer);

returntemp;

)

length=templen;

strcpy(temp.buffer,buffer);

strcat(temp.buffer,append_str);〃字符串相力口

returntemp;

)

voidString::ShowString()

(

cout«buffer«endl;

)

C/C++Program

例6-3

#include"stdafx.h"

#include"iostream'*//complex.cpp

usingnamespacestd;

#include"complex.h"

classComplex//complex.h

private:

doublereal;

doubleimag;

public:

Complex(doubler=0.0,doublei=0.0);

voidprint();

Complexoperator+(Complexa);〃重载加法运算符

Complexoperator-(Complexa);〃重载减法运算符

)；

intmain()

(

Complexcom1(1.1,2.2),com2(3.3,4.4),total;

total=coml+com2;〃隐式调用

total.print();

total=coml-com2;〃隐式调用

total.print();

return0;

)

Complex::Complex(doubler,doublei)

(

real=r;

imag=i;

)

ComplexComplex::operator+(Complexa)

(

Complextemp;

temp.real=real+a.real;

temp.imag=imag+a.imag;

returntemp;

)

ComplexComplex::operator-(Complexa)

(

Complextemp;

temp.real=real-a.real;

temp.imag=imag-a.imag;

returntemp;

}

voidComplex::print()

(

cout«real;

if(imag>0)

cout«n+n;

if(imag!=0)

cout«imag«,,i,,«endl;

4.4+6.6i

-2.2-2.2i

例6-4

#include"stdafx.h',

#include"iostream"//point.cpp

usingnamespacestd;

#include"point.h"

classPoint//point.h

(

private:

intx,y;

public:

Point(inti=0,intj=0);

Pointoperator++();

Pointoperator-();

Pointoperator++(int);

Pointoperator-(int);

voidprint();

)；

intmain()

(

Pointob1(1,2),ob2(4,5),ob;

cout«nobl:n;

obl.print();

cout«n++obl:n;

++obl;〃前缀++运算符重载

cout«nobl:n;

obl.printO;

cout«nob2:n;

ob2.print();

cout«n—ob2:

-ob2;〃前缀--运算符重载

cout«nob2:"；

ob2.print();

cout«nob=ob1++n«endl;

ob=obl++;〃后缀++运算符重载

cout«nob:"；

ob.print();

cout«nobl:"；

obl.printO;

cout«nob=obl—"«endl;

ob=ob1-；〃后缀--运算符重载

cout«nob:"；

ob.print();

cout«nobl:"；

obl.print();

return0;

)

Point::Point(inti,intj)

(

x=i;

y=j;

)

voidPoint::print()

(

cout«"("«x«","«y«")"«endl;

}

PointPoint::operator++()

(

++x;

++y;

return*this;

)

PointPoint::operator-()

(

-x;

-y；

return*this;

)

PointPoint::operator++(int)

(

Pointtemp=*this;//保存原对象值

x++;

y++;

returntemp;

)

PointPoint::operator-(int)

(

Pointtemp=*this;//保存原对象值

x-；

y-;

returntemp;

ob1:(1,2)

++obl:obl:(2,3)

ob2:(4,5)

-ob2:ob2：(3,4)

ob=obl++

ob:(2,3)

obi:(3,4)

ob=obl—

ob:(3,4)

obi:(2,3)

例6-5

#include"stdafx.h"

#include"iostream”//student.cpp

#include"iomanip"

usingnamespacestd;

#include"student.h"

classStudent//student.h

(

private:

char*name;

intscore;

public:

Student(char*na,ints);

〜Student。；

voidprint();

);

intmain()

(

Studentpl("zhang”,90);

Studentp2("wang",80);

p2=pl;

cout«np2:n;

p2.print();

return0;

)

Student::Student(char*na,ints)

name=newchar[strlen(na)+l];

strcpy_s(name,strlen(na)+l,na);

score=s;

Student::-Student()

(

deletename;

)

voidStudent::print()

(

cout«name«setw(5)«score«endl;

)

此程序有问题问大神答案思密达〜

例6-6

#include"stdafx.h"

#include"iostream”//str.cpp

usingnamespacestd;

#include"str.h"

const血MAXSIZE=20;//str.h,存放字符串的最大长

度

classString

(

private:

char"buffer;

intlength;

public:

String(char*in_str);

constString&operator+=(constString&);〃声明+二运算符重载函数

voidShowStringO;

〜String。；

)；

intmain()

(

Stringsi("happyn),s2("birthday'1);

sl+=s2;

sl.ShowStringO;

sl+-ftoyou”；

sl.ShowStringO;

return0;

)

String::String(char*in_str)

length=strlen(in_str);

buffer=newchar[length+l];

strcpy(buffer,in_str);

)

constString&String::operator+=(constString&append_str)

//定义+=运算符重载函数

char*temp二buffer;〃指向原字符串所占空间

length+=append_str.length;〃计算连接后的字符串的长度

buffer=newchar[length+l];//重新分配空间

strcpy(buffer,temp);〃将原字符串复制到分配的空间中

strcat(buffer,append_str.buffer);//^append_str的字符串连接到所分配的空间

中

deletef]temp;〃释放原字符串所占空间

return*this;

voidString::ShowString()

(

cout«buffer«endl;

)

String::-String()

(

delete[]buffer;

)

happybirthday

happybirthdaytoyou

例6-7

#include"stdafx.h"

#include"iostream”//vector.cpp

#include"iomanip"

usingnamespacestd;

#include"vector.h"

classVector//vector.h

(

private:

intv[3];

public:

Vector(intal,inta2,inta3);

int&operator[](intbi);

intmain()

inti;

Vectorv(l,3,5);

coutv<”修改前：n«endl;

for(i=0;i<3;i++)

cout«v[i]«setw(4);

cout«endl;

cout<<"修改后：H«endl;

for(i=0;i<3;i++)

v[i]=2*i;

for(i=0;i<3;i++)

cout«v[i]«setw(4);

cout«endl;

return0;

)

Vector::Vector(intal,inta2,inta3)

(

v[0]=al;

v[l]=a2;

v[2]=a3;

)

int&Vector::operator[](intbi)

(

if(bi<0||bi>=3)

(

cout«nBadsubscript!u«endl;

exit(l);

)

returnv[bi];

修改前：

135

修改后：

024

例6-8

#include"stdafx.h"

#include"iostream"

usingnamespacestd;

#include"matrix.h"

classMatrix//matrix.h

private:

int*m;

introw,col;

public:

Matrix(int,int);

int&operator()(int,int);

);

intmain()

(

MatrixaM(10,10);

cout«aM(3,4)<<endl;

aM(3,4)=35;

cout«aM(3,4)«endl;

return0;

)

Matrix::Matrix(intr,intc)

(

row=r;

col=c;

m=newint[row*col];

for(inti=0;i<row*col;i++)

*(m+i)=i;

)

int&Matrix::operator()(intr,intc)

(

return(*(m+r*col+c));

)

34

35

例6-9

#include"iostream"//Complex.cpp

usingnamespacestd;

#include"complex.h"

classComplex;

Complexoperator+(Complexa,Complexb);

Complexoperator-(Complexa,Complexb);

classComplex//Complex.h

(

private:

doublereal;

doubleimag;

public:

Complex(doubler=0.0,doublei=0.0);

voidprint();

friendComplexoperator+(Complexa,Complexb);

friendComplexoperator-(Complexa,Complexb);

)；

intmain()

(

Complexcom1(5.5,6.6),com2(7.7,9.8),total;

total=coml+com2;

total.print();

total=coml-com2;

total.print();

return0;

)

Complex::Complex(doubler,doublei)

(

real=r;

imag=i;

)

Complexoperator+(Complexa,Complexb)

(

Complextemp;

temp.real=a.real+b.real;

temp.imag=a.imag+b.imag;

returntemp;

)

Complexoperator-(Complexa,Complexb)

{

Complextemp;

temp.real=a.real-b.real;

temp.imag=a.imag-b.imag;

returntemp;

)

voidComplex::print()

(

cout«real;

if(imag>0)

cout<<"+"；

if(imag!=0)

cout«imag«Hin«endl;

13.2+16.4i

-2.2-3.2i

例6-10

#includeMstdafx.h"

#include"iostream"//point.cpp

#include"iomanip'*

usingnamespacestd;

#include"point.h"

classPoint;

Pointoperator-(Pointob);

classPoint//point.h

(

private:

intx,y;

public:

Point(inti=0,intj=0);

friendPointoperator-(Pointob);

voidprint();

)；

intmain()

(

Pointobl(l,2),ob2;

cout«nob1:"«endl;

obl.print();

cout«n-obl:u«endl;

ob2=-obl;

ob2.print();

return0;

)

Point::Point(inti,intj)

(

x=i;

y=j;

}

voidPoint::print()

(

cout«"(x,y)"«setw(5)«"("«x«","«y«")"«endl;

)

Pointoperator-(Pointob)

ob.x=-ob.x;

ob.y-ob.y;

returnob;

}

obi:

(x,y)(1,2)

-obi:

(x,y)(-1,-2)

例6-11

#include"stdafx.h"

#include"iostream"//point.cpp

#include"iomanip"

usingnamespacestd;

#include"point.h'1

classPoint//point.h

(

private:

intx,y;

public:

Point(inti=0,intj=0);

friendPointoperator++(Pointob);

voidprint();

)；

intmain()

(

Pointobi(1,2);

cout«nob1:n«endl;

obl.print();

cout«n++obl:"«endl;

++obl;

obl.print();

return0;

)

Point::Point(inti,intj)

(

x=i;

y=j；

)

voidPoint::print()

cout«"(x,y)"«setw(5)«"("«x«","«y<<")"«endl;

Pointoperator++(Pointob)

(

++ob.x;

++ob.y;

returnob;

}

obi:

(x,y)(1,2)

++ob1:

(x,y)(1,2)

例6-12

#include"stdafx.h"

#include"iostream”//point.cpp

#include"iomanip"

usingnamespacestd;

#include"point.h"

classPoint//point.h

(

private:

intx,y;

public:

Point(inti=0,intj=0);

friendPointoperator++(Point&ob);

voidprint();

);

intmain()

(

Pointobi(1,2);

cout«nob1:n«endl;

obl.print();

cout«M+4-ob1:u«endl;

++obl;

obl.printO;

return0;

}

Point::Point(inti,intj)

(

x=i;

y=j;

voidPoint::print()

(

cout«"(x,y)"«setw(5)«"("«x<<","«y«")"«endl;

)

Pointoperator++(Point&ob)

(

++ob.x;

++ob.y;

returnob;

)

obi:

(x,y)(1,2)

++obl:

(x,y)(2,3)

例6-13

#includeHstdafx.hn

#include"iostream"//Complex.cpp

#include"iomanip”

usingnamespacestd;

#include"Complex.h"

classComplex;

Complexoperator+(Complexc,inta);

Complexoperator+(inta,Complexc);

classComplex//Complex.h

(

private:

doublereal;

doubleimag;

public:

Complex(doubler=0.0,doublei=0.0);

voidprint();

friendComplexoperator+(Complexc,inta);

friendComplexoperator+(inta,Complexc);

);

intmain()

(

Complexcom(l.l,2.2);

com=com+10;

cout«ncom+10H«endl;

com.print();

cout«n10+comH«endl;

com=10+com;

com.print();

return0;

)

Complex::Complex(doubler,doublei)

(

real=r;

imag=i;

)

Complexoperator+(Complexc,inta)

(

Complextemp;

temp.real=c.real+a;

temp.imag=c.imag+a;

returntemp;

)

Complexoperator+(inta,Complexc)

(

Complextemp;

temp.real=a+c.real;

temp.imag=a+c.imag;

returntemp;

)

voidComplex::print()

(

cout«real;

if(imag>0)

cout«n+"；

if(imag!=0)

cout«imag«nin<<endl;

)

com+10

ll.l+12.2i

10+com

21.1+22.2i

例6-14

#include"stdafx.h"

#include"iostream'1

usingnamespacestd;

#include'^string.h^^

#include"str.hn

classString//str.h

(

private:

char*str;

intlength;

public:

String(char*s);

voidPrint();

〜String。；

}；

intmain()

(

Strings=”C/C++program1';

s.Print();

return0;

)

String::String(char*s)

(

length=strlen(s);

str=newchar[length+l];

strcpy(str,s);

}

voidString::Print()

(

cout«str«endl;

)

String::-String()

(

delete[]str;

)

C/C++program

例6-15

#include"stdafx.h"

#include"iostream”//Complex.cpp

#include"iomanip'1

usingnamespacestd;

#include"complex.h"

classComplex;

Complexoperator+(Complexcl,Complexc2);

classComplex//Complex.h

private:

doublereal;

doubleimag;

public:

Complex();

Complex(intr);

Complex(doubler,doublei);

voidprint();

friendComplexoperator+(Complexc1,Complexc2);

｝；

intmain()

(

Complexcom1(1.1,2.2),com2;

Complexcom3=10;

cout«ncoml:"；

coml.print();

coml=20+coml;

cout«ncom1=20+com1:"；

coml.print();

com2=10+200;

cout«f,com2=10+200:”;

com2.print();

cout«endl;

cout«ncom3=10:"；

com3.print();

cout«endl;

return0;

)

Complex::Complex()

(

real=0;

imag=0;

)

Complex::Complex(intr)

(

real=r;

imag=0;

)

Complex::Complex(doubler,doublei)

(

real=r;

imag=i;

Complexoperator+(Complexcl,Complexc2)

(

Complextemp;

temp.real=cl.real+c2.real;

temp.imag=c1.imag+c2.imag;

returntemp;

}

voidComplex::print()

(

cout«real;

if(imag>0)

cout«n+"；

if(imag!=0)

cout«imag«nin<<endl;

)

coml:l.l+2.2i

com1=20+com1:21.1+2.2i

com2=10+200:210

com3=10:10

例6-16

#include"stdafx.h"

#include"iostream”//complex.cpp

usingnamespacestd;

#include"complex.hn

classComplex//complex.h

(

private:

doublereal;

doubleimag;

public:

Complex(doubler=0,doublei=0);

operatorfloat();

operatorint();

voidPrint();

)；

intmain()

(

Complexa(2.2,4.4);

a.Print();

cout«float(a)*0.5«endl;

Complexb(4.7,6);

b.Print();

cout«int(b)*2«endl;

return0;

)

Complex::Complex(doubler,doublei)

(

real=r;

imag=i;

cout«uConstructing....n«endl;

)

Complex::operatorfloat()

(

cout«nTypechangedtofloat...."«endl;

returnreal;

)

Complex:operatorint()

(

cout«nTypechangedtoint....M«endl;

returnint(real);

}

voidComplex::Print()

(

cout«,(,«real«V«imag«,),«endl;

)

Constructing....

(2.2,4.4)

Typechangedtofloat....

1.1

Constructing....

(4.7,6)

Typechangedtoint....

8

例6-17

#includeMstdafx.h"

#include"iostream"//complex.cpp

usingnamespacestd;

#include"complex.hn

classComplex//complex.h

private:

doublereal;

doubleimag;

public:

Complex(doubler,doublei);

Complex(doublei=0);

operatordouble();

voidPrint();

)；

intmain()

(

Complexcom1(1.1,2.2),com2(2.3,3.2),com;

com=com1+com2;

com.Print();

return0;

)

Complex::Complex(doubler,doublei)

(

real=r;

imag=i;

)

Complex::Complex(doublei)

(

real=imag=i;

)

Complex::operatordouble()

(

cout«nTypechangedtodouble....n«endl;

returnreal+imag;

)

voidComplex::Print()

(

cout«,(,«real«,/«imag«,),«endl;

)

Typechangedtodouble....

Typechangedtodouble....

(8.8,8.8)

例6-18

#include"stdafx.h',

#include"iostream"//complex.cpp

usingnamespacestd;

#include"complex.hn

classVector{//complex.h

private:

doublex,y;

public:

Vector(doubletx=0,doublety=O);

voidprint();

)；

classComplex

(

private:

doublereal;

doubleimag;

public:

Complex(doubler=0,doublei=0);

operatorVector();

)；

intmain()

(

Complexcom(l.l,2.2);

Vectorvec;

vec=com;

vec.printO;

return0;

)

Complex::Complex(doubler,doublei)

(

real=r;

imag=i;

)

Complex::operatorVector()

(

returnVector(real,imag);

)

Vector::Vector(doubletx,doublety)

(

x=tx;

y=ty;

}

voidVector::print()

(

cout«"("«x«","«y«")"«endl;

(1.1,2.2)

例7-1

#include"myclass.h"

#ifndefSTUDENT_H_

#defineSTUDENT_H_

classStudent{

intNo;

charName[20];

public:

Student();

intGetNo()const;

constchar*GetName()const;

)；

#endif

#ifndefMYCLASS_H_

#defineMYCLASS_H_

#include"student.h"

classMyclass{

enum{NUM=50};

charcName[20];〃班级名称

intiNum;//班级人数

StudentstuList[NUM];〃学生列表

public:

MyclassQ;

constchar*GetClassName();

constchar*GetStuName(intiNo);〃通过学号得到某个学生的姓名

)；

#endif

intmain(intargc,char*argv[])

(

Myclassmyclass;

return0;

)

此程序有问题，请找大神思密达〜

例7-2

#include<iostream>

usingnamespacestd;

classPoint{//基类Point类的声明

private:

floatX,Y;

public:

voidInitP(floatxx=0,floatyy=0){

X二xx;Y=yy;

)

voidMove(floatxOff,floatyOff){〃点的移动

X+=xOff;Y+=yOff;

)

floatGetX(){returnX;}

floatGetY(){returnY;}

)；

classRectangle:publicPoint{//派生类声明

private:〃新增私有数据成员

floatW,H;〃矩形的宽、高

public:〃新增公有函数成员

voidInitR(floatx,floaty,floatw,floath){

InitP(x,y);〃调用基类公有成员函数

W=w;

H=h;

)

floatGetH(){returnH;}

floatGetW(){returnW;}

)；

intmain(){

Rectanglerect;

rect.InitR(2,3,20,10);〃通过派生类对象访问基类公有成员

//rect.H;//错误，父类私有成员

//rect.W;〃错误，父类私有成员

rect.Move(3,2);

cout«rect.GetX()«\,

«rect.GetY()«\,

«rect.GetH()«,/

«rect.GetW()«endl;

return0;

)

5,5,10,20

例7-3

#include"stdafx.h',

#ifndefPERSON_H_

#definePERSON_H_

classPerson{〃定义人类

charstrName[20];〃姓名

intiAge;//年龄

charcSex;〃性别

public:

Person(constchar*cpName=NULL,intage=O,charsex='m');

constchar*GetName(){returnstrName;}

intGetAge(){returniAge;}

charGetSex(){returncSex;}

voidSetName(constchar*cpName);

voidSetAge(intage){iAge=age;}

voidSetSex(charsex){cSex=sex;}

);

classTeacher:publicPerson{

intiWID;//工号

public:

Teacher(constchar*cpName=NULL,intage=0,charsex=,m,,int

no=0):Person(cpName,age,sex),iWID(no){

}

intGetWID(){returniWID;}

voidSetWID(intno){iWID=no;}

);

classStudent:publicPerson{〃学生类

intiNo;//学号

floatfScore[5];//5门课程的成绩

floatfAve;〃平均成绩

public:

Student(constchar*cpName=NULL,intage=0,charsex='m；int

no=0):Person(cpName,age,sex),iNo(no){

}一

intGetNo(){returniNo;}

voidSetNo(intno){iNo=no;}

voidSetScore(constfloatfData[]);

floatGetAveScore(){returnfAve;}〃得到平均成绩

)；

#endif

#ifndefMYCLASS_H_

#defineMYCLASS_H_

#include"person.hn

classMyClass{

enum{NUM=50};

StudentstuListfNUM];〃学生列表

intiNum;//人数

Teachertea;〃辅导员

charstrClassName[20];//班级名称

public:

MyClass(){iNum=O;}

}；

#endif

int_tmain(intargc,_TCHAR*argvf])

(

return0;

)

无结果

例7-4

#include"stdafx.h"

#include<iostream>

usingnamespacestd;

classA{

inta;

public:

A(inti=0):a(i){

cout«"AisconstructedH«endl;

);

~A(){

cout«HAisdestructed"«endl;

)

)；

classB:publicA{

intb;

public:

B(intj=0):b(j){

cout«"Bisconstructedn«endl;

)

〜B(){

cout«"Bisdestructedn«endl;

)

)；

int_tmain(intargc,_TCHAR*argvf])

(

Bb;

return0;

Aisconstructed

Bisconstructed

Bisdestructed

Aisdestructed

例7-5

#include"stdafx.h"

#include<iostream>

usingnamespacestd;

classX{

public:

X()(

cout«nXisconstructed"«endl;

〜X(){

cout«nXisdestructedn«endl;

classA{

inta;

Xx;

public:

A(inti=0):a(i){

cout«nAisconstructedH«endl;

~A(){

cout«nAisdestructedn«endl;

)

);

classY{

inty;

public:

Y(inti=0){

y=i;

cout«nYisconstructedH«endl;

〜Y(){

cout«nYisdestructedH«endl;

)；

classZ{

intz;

public:

Z(inti=0){

z=i;

cout«nZisconstructedH«endl;

〜Z(){

cout«nZisdestructedn«endl;

)

);

classB:publicA{

intb;

Yy;

Zz;

public:

B(intj=O):A(l),z0),b0),yC){

cout«nBisconstructedH«endl;

)

~B(){

cout«"Bisdestructedn«endl;

)

);

血_tmain(intargc,_TCHAR*argv[])

(

Bb;

return0;

)

Xisconstructed

Aisconstructed

Yisconstructed

Zisconstructed

Bisconstructed

Bisdestructed

Zisdestructed

Yisdestructed

Aisdestructed

Xisdestructed

例7-6

#include"sldafx.h"

#include<iostream>

usingnamespacestd;

classA{

inta;

public:

A(){

cout«"Aisconstructed"«endl;

)；

~A(){

cout«"Aisdestructed"«endl;

)

);

classY{

血y;

public:

Y(inti=0){

y=i；

cout«HYisconstructedn«endl;

)

〜Y(){

cout«"Yisdestructed"«endl;

)

);

classB:publicA{

intb;