C大作业报告

1、c+大作业报告姓名：常皓学号：03101261班级：031013销售公司员工管理设计一个虚基类staff（员工），包含编号、姓名和年龄保护数据成员以及相关的成员函数；由staff派生出销售员类salesman，包含销售额保护数据成员以及相关的成员函数；再由staff派生出经理类manager；然后由salesman和manager类派生出销售经理类salesmanager。设计一个利用文件处理方式实现对公司人员（包括销售员、经理和销售经理）进行管理，具有增加数据、更新数据、查询数据、删除数据以及重组文件的功能。（删除数据在记录中做删除标志，重组文件指在物理上删除有删除标志的记录。）另外要求分别

2、统计这三类员工的人数以及所有员工的总数。编程思想：首先定义一个虚基类staff类，然后通过虚拟继承生成salesman类和manager类，最后由salesman和manager派生出主任销售员类salesmanager。这四个类中定义inputfromfile(istream &in)这一输入函数，另外每个类还定义输入信息和输出信息的成员函数,之后定义staffchart、salesmanchart、managerchart和salesmanagerchart四个类来，为实现增加、更新、查询、删除以及全部显示人员的功能定义additem、modifyitem、find、removeitem以

3、及display函数。最后在主函数定义staff_chart、salesman_chart、manager_chart和salesmanager_chart四个对象，通过循环执行并用switch函数选择功能，然后调用相关的函数来实现各种功能。实验代码：#includeiostream#includefstreamusing namespace std;class staff protected:char num10;char name10;int age;public:staff * next;void set_staff()coutnum;coutname;coutage;void inpu

4、tfromfile(istream &in)innumnameage;void show()cout编号：numendl;cout姓名：nameendl;cout年龄：ageendl;char *get_num()return num;char *get_name()return name;int get_age()return age;class salesman:virtual public staffprotected:char major10;char t_title10;public:salesman * next;void set_salesman()coutnum;coutnam

5、e;coutage;coutmajor;coutt_title;void inputfromfile(istream &in)innumnameagemajort_title;void show_salesman()cout编号：numendl;cout姓名：nameendl;cout年龄：ageendl;cout专业：majorendl;cout职称：t_titleendl;char *get_major()return major;char *get_t_title()return t_title;class manager:virtual public staffprotected:ch

6、ar job10;char dept10;public:manager * next;void set_manager()coutnum;coutname;coutage;coutjob;coutdept;void inputfromfile(istream &in)innumnameagejobdept;void show_manager()cout编号：numendl;cout姓名：nameendl;cout年龄：ageendl;cout职务：jobendl;cout部门：deptendl;char *get_job()return job;char *get_dept()return d

7、ept;class salesmanager:public salesman,public managerpublic:salesmanager * next;void set_salesmanager()coutnum;coutname;coutage;coutmajor;coutt_title;coutjob;coutdept;void inputfromfile(istream &in)innumnameagemajort_titlejobdept;void show_salesmanager()cout编号：numendl;cout姓名：nameendl;cout年龄：ageendl;

8、cout专业：majorendl;cout职称：t_titleendl;cout职务：jobendl;cout部门：deptnext;for(p;p!=end;p=p-next)p-show();coutset_staff();end-next=new staff;end=end-next;save();private:staff * head,* end;ifstream in; /文件输入ofstream out; /文件输出staff * finditem(char * num)for(staff * p=head;p-next!=end;p=p-next)if(!strcmp(p-ne

9、xt-get_num() ,num)return p;return null;staffchart:staffchart() /构造函数 head=new staff;head-next=new staff;end=head-next;in.open(staffchart.txt);while(!in.eof()end-inputfromfile(in);if(end-get_num()0=0)break;end-next=new staff;end=end-next;in.close();staffchart:staffchart() /析构函数for(staff * temp;head-n

10、ext!=end;)temp=head-next;head-next=head-next-next;delete temp;delete head,end;void staffchart:find() /查找条目char num10;staff * p=null;coutnum;if(p=finditem(num)p-next-show();elsecout没有找到!endlendl;void staffchart:modifyitem() /修改条目char num10;staff * p=null;coutnum;if(p=finditem(num)p-next-show();cout请输

11、入新的内容：next-set_staff();elsecout没有找到!endlendl;save();void staffchart:removeitem() /删除条目char num10;staff *p=null,*temp=null;coutnum;if(p=finditem(num)temp=p-next;p-next=p-next-next;delete temp;cout删除成功!endlendl;elsecout没有找到!endlnext;p!=end;p=p-next)outget_num() get_name() get_age()next;p!=end;p=p-next

12、)p-show_salesman();void additem() /添加条目end-set_salesman();end-next=new salesman;end=end-next;save();private:salesman * head,* end;ifstream in; /文件输入ofstream out; /文件输出salesman * finditem(char * num)for(salesman * p=head;p-next!=end;p=p-next)if(!strcmp(p-next-get_num() ,num)return p;return null;sales

13、manchart:salesmanchart() /构造函数 head=new salesman;head-next=new salesman;end=head-next;in.open(salesmanchaart.txt);while(!in.eof()end-inputfromfile(in);if(end-get_num()0=0)break;end-next=new salesman;end=end-next;in.close();salesmanchart:salesmanchart() /析构函数for(salesman * temp;head-next!=end;)temp=h

14、ead-next;head-next=head-next-next;delete temp;delete head,end;void salesmanchart:find() /查找条目char num10;salesman * p=null;coutnum;if(p=finditem(num)p-next-show_salesman();elsecout没有找到!endlendl;void salesmanchart:modifyitem() /修改条目char num10;salesman * p=null;coutnum;if(p=finditem(num)p-next-show_sal

15、esman();cout请输入新的内容：next-set_salesman();elsecout没有找到!endlendl;save();void salesmanchart:removeitem() /删除条目char num10;salesman *p=null,*temp=null;coutnum;if(p=finditem(num)temp=p-next;p-next=p-next-next;delete temp;cout删除成功!endlendl;elsecout没有找到!endlnext;p!=end;p=p-next)outget_num()get_name()get_age(

16、)get_major()get_t_title()next;for(p;p!=end;p=p-next)p-show_manager();void additem() /添加条目end-set_manager();end-next=new manager;end=end-next;save();private:manager * head,* end;ifstream in; /文件输入ofstream out; /文件输出manager * finditem(char * num)for(manager * p=head;p-next!=end;p=p-next)if(!strcmp(p-n

17、ext-get_num() ,num)return p;return null;managerchart:managerchart() /构造函数 head=new manager;head-next=new manager;end=head-next;in.open(managerchaart.txt);while(!in.eof()end-inputfromfile(in);if(end-get_num()0=0)break;end-next=new manager;end=end-next;in.close();managerchart:managerchart() /析构函数for(m

18、anager * temp;head-next!=end;)temp=head-next;head-next=head-next-next;delete temp;delete head,end;void managerchart:find() /查找条目char num10;manager * p=null;coutnum;if(p=finditem(num)p-next-show_manager();elsecout没有找到!endlendl;void managerchart:modifyitem() /修改条目char num10;manager * p=null;coutnum;if

19、(p=finditem(num)p-next-show_manager();cout请输入新的内容：next-set_manager();elsecout没有找到!endlendl;save();void managerchart:removeitem() /删除条目char num10;manager *p=null,*temp=null;coutnum;if(p=finditem(num)temp=p-next;p-next=p-next-next;delete temp;cout删除成功!endlendl;elsecout没有找到!endlnext;p!=end;p=p-next)out

20、get_num()get_name()get_age()get_job()get_dept()next;for(;p!=end;p=p-next)p-show_salesmanager();void additem() /添加条目end-set_salesmanager();end-next=new salesmanager;end=end-next;save();private:salesmanager * head,* end;ifstream in; /文件输入ofstream out; /文件输出salesmanager * finditem(char * num)for(salesm

21、anager * p=head;p-next!=end;p=p-next)if(!strcmp(p-next-get_num() ,num)return p;return null;salesmanagerchart:salesmanagerchart() /构造函数 head=new salesmanager;head-next=new salesmanager;end=head-next;in.open(salesmanagerchaart.txt);while(!in.eof()end-inputfromfile(in);if(end-get_num()0=0)break;end-nex

22、t=new salesmanager;end=end-next;in.close();salesmanagerchart:salesmanagerchart() /析构函数for(salesmanager * temp;head-next!=end;)temp=head-next;head-next=head-next-next;delete temp;delete head,end;void salesmanagerchart:find() /查找条目char num10;salesmanager * p=null;coutnum;if(p=finditem(num)p-next-show_

23、salesmanager();elsecout没有找到!endlendl;void salesmanagerchart:modifyitem() /修改条目char num10;salesmanager * p=null;coutnum;if(p=finditem(num)p-next-show_salesmanager();cout请输入新的内容：next-set_salesmanager();elsecout没有找到!endlendl;save();void salesmanagerchart:removeitem() /删除条目char num10;salesmanager *p=nul

24、l,*temp=null;coutnum;if(p=finditem(num)temp=p-next;p-next=p-next-next;delete temp;cout删除成功!endlendl;elsecout没有找到!endlnext;p!=end;p=p-next)outget_num()get_name()get_age()get_job()get_dept()endl;out.close();int main()int x,y;staffchart staff_chart;salesmanchart salesman_chart;managerchart manager_char

25、t;salesmanagerchart salesmanager_chart;bool quit=false;while(!quit)cout选择功能：n1.增加数据t2.更新数据t3.查询数据t4.删除数据t5.列出全部人员t6.退出x;switch(x)case 1:cout选择增加的类型：n1.员工t2.销售员t3.经理t4.销售经理y;switch(y)case 1:staff_chart.additem();break;case 2:salesman_chart.additem();break;case 3:manager_chart.additem();break;case 4:s

26、alesmanager_chart.additem();break;default :cout输入错误，程序终止！endl;exit(-1);break;case 2:cout选择更新的类型：n1.员工t2.销售员t3.经理t4.销售经理y;switch(y)case 1:staff_chart.modifyitem();break;case 2:salesman_chart.modifyitem();break;case 3:manager_chart.modifyitem();break;case 4:salesmanager_chart.modifyitem();break;default :cout输入错误，程序终止！endl;exit(-1);break;case 3:cout选择查询的类型：n1.员工t2.销售员t3.经理t4.销售经理y;switch(y)case 1:staff_chart.find();break;case 2:s