实验5多态性和运算符重载【保证能编译连接无措】

1、实验5 多态性和运算符重载一、 姓名 班级 电信13F 学号 二、 实验目的通过vc开发环境下派生类多态性的设计与实现，了解运行时多态的概念，掌握派生类多态性基本设计和编程方法。三、 实验主要内容1、 有三角形、正方形和圆形三种图形，求它们各自的面积。可先抽象出一个基类，在基类中声明一个虚函数，用于求面积，并利用单界面设计各个图形求面积的方法。2、 使用成员函数重载实现复数四则运算、逻辑运算和关系运算；3、 使用友元函数重载实现字符串连接运算，赋值运算；四、 实验程序1. #include<iostream>#include<math.h>using namespace

2、 std;#define PI 3.14class basepublic:virtual double area()return 0;class triangle:public baseprotected:double h; double w;public:triangle(double H,double W)h=H; w=W;double area()return 0.5*h*w;class square:public baseprotected:double a;public:square(double A)a=A;double area()return a*a;class circle:

3、public baseprotected:double radius;public:circle(double Rad)radius=Rad;double area()return PI * radius * radius;void main()base *a,*b,*c;a=new triangle(2,8);b=new square(9);c=new circle(5);cout<<a->area ()<<endl;cout<<b->area ()<<endl;cout<<c->area ()<<en

4、dl; 2. #include<iostream>using namespace std;class complex /复数protected:double real; /实部 double imag; /虚部public:complex();complex(double Real,double Imag)real=Real; imag=Imag;complex operator+ (complex&); /使用成员函数重载实现复数加法运算complex operator- (complex&); /使用成员函数重载实现复数减法运算complex operator*

5、 (complex&); /使用成员函数重载实现复数乘法运算complex operator/ (complex&); /使用成员函数重载实现复数除法运算 complex operator&&(complex&); /使用成员函数重载实现与运算complex operator|(complex&); /使用成员函数重载实现或运算 complex operator! (); /使用成员函数重载实现非运算 complex operator<(complex&); /使用成员函数重载实现或运算void print( complex&

6、; c) /输出结果if(c.imag<0) cout<<c.real<<c.imag<<'i'<<"n"else cout<<c.real<<'+'<<c.imag<<'i'<<"n" ;complex complex: operator+ (complex& c) /加法return complex(real+c.real,imag+c.imag);complex complex:

7、operator- (complex& c) /减法return complex(real-c.real,imag-c.imag);complex complex: operator* (complex& c) /乘法return complex(real * c.real - imag * c.imag, real * c.imag + imag * c.real); complex complex: operator/ (complex &c) /除法return complex(real * c.real + imag + c.imag) / (c.real *

8、c.real + c.imag * c.imag),(imag * c.real - real * c.imag) / (c.real * c.real + c.imag * c.imag); complex complex: operator&& (complex& c) /与运算return complex(real&&c.real,imag&&c.imag);complex complex: operator| (complex& c) /或运算return complex(real|c.real,imag|c.imag);

9、complex complex: operator! () /非运算return complex(!real,!imag);complex complex: operator< (complex& c) /小于运算if(real<c.real) return complex(real,imag);else return complex(c.real,c.imag);void main()complex c1(1.0, -0.0), c2(3.0, -1.0), c3; c3 = c1 + c2; cout<<"c1+c2=" c3.print

10、(c3);c3 = c1 - c2; cout<<"c1-c2=" c3.print(c3);c3 = c1 * c2; cout<<"c1*c2=" c3.print(c3);c3 = c1 / c2; cout<<"c1/c2=" c3.print(c3);c3 = c1&&c2; cout<<"c1&&c2=" c3.print(c3);c3 = c1|c2; cout<<"c1|c2=" c3.p

11、rint(c3);c3=!c1; cout<<"!c1=" c3.print(c3);c3=c1<c2; cout<<"输出实部较小的复数=" c3.print(c3); 3. #include<iostream>#include<string.h>using namespace std;class employee /员工类protected:char name20; /员工名字char id20; /员工号double salary; /员工薪水public:employee();employee

12、(char* emp_name,char* emp_id) /建立员工基本信息strcpy(name,emp_name); strcpy(id,emp_id);char* get_name() /获取名字return name;char* get_id() /获取职工号return id;double get_salary() /应得薪水return salary;class hourlyworker:public employee /时薪工类protected:int hours;double hourpay;public:hourlyworker();hourlyworker(char*

13、hour_name,char* hour_id,int hour,double pay):employee(hour_name,hour_id)hours=hour; hourpay=pay;char *get_name()return employee:get_name ();char *id()return employee:get_id ();int get_hours() /获取工作时间return hours;double get_hourpay() /获取小时工资return hourpay;double get_salary() /时薪工工资计算if(hours<=50)s

14、alary=hourpay*hours;elsesalary=hourpay*50+2*hourpay*(hours-50);return salary;class pieceworker:public employee /计件工类protected:int pieces; /工件数double piecepay; /每个工件赢得的工资public:pieceworker();pieceworker(char* piece_name,char* piece_id,int piece,double piece_pay):employee(piece_name,piece_id)pieces=pi

15、ece; piecepay=piece_pay;char *get_name()return employee:get_name ();char *id()return employee:get_id ();int get_pieces() /获取工件数return pieces; double get_pay() /每件的工资return piecepay;double piece_salary() /计件工工资salary=pieces*piecepay;return salary;class manager:public employeepublic:manager(char* man_

16、name,char* man_id):employee(man_name,man_id)char *get_name()return employee:get_name ();char *id()return employee:get_id ();double manager_salary() /经理工资return salary=3000; class commissionworker:public employee /佣金工类protected:double basesalary; /保底新书double total; /一周内的销售总额double percent; /提成的额度publ

17、ic:commissionworker();commissionworker(char* com_name,char* com_id,double com_basesalary,double com_total,double com_percent):employee(com_name,com_id)basesalary=com_basesalary; total=com_total; percent=com_percent;char *get_name()return employee:get_name ();char *id()return employee:get_id ();doubl

18、e get_base_pay() /保底薪水return basesalary;double get_com_total() /销售总额return total;double get_com_percent() /销售额中提成return percent;double com_salary() /佣金工的工资salary=basesalary+total*percent;return salary;void main() cout<<"输出时薪工信息："<<"n" hourlyworker hworker("may&qu

19、ot;,"1413250",75,20.5); cout<<" hourlyworker'名字: "<<hworker.get_name ()<<"n" cout<<" hourlyworker'职工号: "<<hworker.get_id ()<<"n" cout<<" hourlyworker'工作小时数:"<<hworker.get_hours ()&

20、lt;<"n" cout<<" hourlyworker'每小时金额:"<<hworker.get_hourpay ()<<"n" cout<<" hourlyworker'总工资: "<<hworker.get_salary ()<<"n" cout<<"*"<<"n" cout<<"输出计件工信息："&l

21、t;<"n" pieceworker pworker("march","1413258",100,25.5); cout<<" pieceworker'名字: "<<pworker.get_name ()<<"n" cout<<" pieceworker'职工号: "<<pworker.get_id ()<<"n" cout<<" piece

22、worker'工件数: "<<pworker.get_pieces ()<<"n" cout<<" pieceworker'每件的金额:"<<pworker.get_pay ()<<"n" cout<<" pieceworker'总工资: "<<pworker.piece_salary ()<<"n" cout<<"*"<<

23、"n" cout<<"输出经理信息："<<"n" manager manag("Jack","000003"); cout<<" manager'名字: "<<manag.get_name ()<<"n" cout<<" manager'职工号:"<<manag.get_id ()<<"n" cout<

24、;<" manager'总工资:"<<manag.manager_salary ()<<"n" cout<<"*"<<"n" cout<<"输出佣金工信息："<<"n" commissionworker cworker("Jim","1413257",578,254,0.01); cout<<" commissionworker&

25、#39;名字: "<<cworker.get_name ()<<"n" cout<<" commissionworker'职工号: "<<cworker.get_id ()<<"n" cout<<" commissionworker'保底工资:"<<cworker.get_base_pay ()<<"n" cout<<" commissionworker'销售额: "<<cworker.get_com_total ()<<"n" cout<<" commissionworker'提成额度:&qu