1、声明一个虚基类person，数据成员有姓名、性别、年龄；纯虚函数show()。

2、一个派生自person类的employee类，有单位、应发工资，实发工资等数据成员，编写show()函数；

3、另一个派生自person类的student类，有专业、年级、学号数据成员，编写show()函数；

4、派生自employee类和student类的表示在职攻读学位的in-service类，他同时具有employee类和student类的性质。但是他的实发工资就会因为读书而只发放应发工资的80%，编写show()函数。

Main函数实现以上各功能。

注意：1、使用基类和派生类的对象指针来体会虚函数，如果不声明show()为虚函数结果会如何？

2、在in-service类对象中访问基类person数据成员，试想如果不将person声明为虚基类结果会怎样？

二、函数重载

给出类：

class three_d

{

int x,y,z;

public:

three_d(int i,int j,int k)

{

x=i;

y=j;

z=k;

}

three_d()

{

x=0;

y=0;

z=0;

}

void get(int &i,int &j,int &k)

{

i=x;

j=k;

k=z;

}

};

针对给出的类，重载”+”、”-”和”++”运算符。

你的第二 题,可以到 置顶的 常用算法 中看看, 我写了一个 复数的 重载,

和你的 一样~

第一题, 至于 用对象 指针 体会, 那 要自己写了, 我要上课了~~

#include<iostream.h> #include<string.h>

class Cperson { protected: char Cname[8]; char Csex[5]; int Iage; public: Cperson(){}; Cperson(char *n,char *s,int a) { strcpy(Cname,n); strcpy(Csex,s); Iage=a; } virtual void show() { cout<<"姓名:"<<Cname<<endl; cout<<"性别:"<<Csex<<endl; cout<<"年龄:"<<Iage<<endl; } };

class Cemployee : public Cperson { protected: char Caddress[7]; double Fyingfawage; double Fshifawage; public: Cemployee(){}; Cemployee(char *n,char *s,int a,char *d,double ying,double shi):Cperson(n,s,a) { strcpy(Cname,n); strcpy(Csex,s); Iage=a; strcpy(Caddress,d); Fyingfawage=ying; Fshifawage=shi; } void show() { Cperson::show(); cout<<"单位:"<<Caddress<<endl; cout<<"应发工资:"<<Fyingfawage<<endl; cout<<"实发工资:"<<Fshifawage<<endl; } };

class Cstudent : public Cperson { protected: char Cspecialty[10]; char Cgrade[10]; int Cid; public: Cstudent(){}; Cstudent(char *p,char *g,int i) { strcpy(Cspecialty,p); strcpy(Cgrade,g); Cid=i; } Cstudent(char *n,char *s,int a,char *p,char *g,int i):Cperson(n,s,a) { strcpy(Cspecialty,p); strcpy(Cgrade,g); Cid=i; } void show1() { cout<<"专业:"<<Cspecialty<<endl; cout<<"年级:"<<Cgrade<<endl; cout<<"学号:"<<Cid<<endl; } void show() { Cperson::show(); cout<<"专业:"<<Cspecialty<<endl; cout<<"年级:"<<Cgrade<<endl; cout<<"学号:"<<Cid<<endl; } };

class Cin_service:public Cemployee,public Cstudent { public: Cin_service(char *n,char *s,int a,char *d,double ying,double shi,char *p,char *g,int i):Cemployee(n,s,a,d,ying,shi*0.8),Cstudent(p,g,i) {

} void show() { Cemployee::show(); Cstudent::show1(); } };

int main() { Cperson person("张三","男",20); person.show(); cout<<"*-------------------------------------------*"<<endl; Cemployee employee("李四","女",20,"会计部",1500,1500); employee.show(); cout<<"*-------------------------------------------*"<<endl; Cstudent student("王五","男",20,"计算机","大三",456); student.show(); cout<<"*-------------------------------------------*"<<endl; Cin_service in_service("小样","男",20,"教研室",2000,2000,"计算机","大四",456); in_service.show(); cout<<"*-------------------------------------------*"<<endl; return 0;

}

谢谢

不用谢,~~~~~