【专业文档】公司员工管理信息系统

1、学生实验报告学院：软件与通信工程学院课程名称：C+课程设计专业班级：10软件1班姓名：黄道炜学号：0103815学生实验报告（5）学生姓名黄道炜学号0103815同组人：无实验项目公司员工管理信息系统必修R选修口演示性实验口验证性实验口操作性实验。综合性实验实验地点W102实验仪器台号指导教师赵晓平实验日期及节次2011.11.9（三）567节2011.11.16（三）567节2011.11.23（三）567节一、实验综述1、实验目的及要求利用文件处理方式，并综合运用C+面向对象编程实现一个公司员工管理信息系统。实验题：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

2、的成员函数；由Staff派生出工程师类Engineer,包含专业和职称保护数据成员和相关的成员函数；再由Staff派生出领导类Leader,包括职务和部门保护数据成员和相关的成员函数；然后由Engineer和Leader类派生出主任工程师类Chairman。设计一个利用文件处理方式实现对公司员工（包括工程师、领导和主任工程师）进行管理，具备增加数据、更新数据、查询数据、删除数据以及重组文件的功能。要求将公司人员信息存储在数据文件staff.dat中，为存储方便，可以定义索引文件，在索引文件中，每一项包括删除标志、编号，记录在数据文件staff.dat中的相对位置和人员类型，使用索引对数据文件进

3、行定位操作。实验要求：认真完成实验题，能正确运行，提交实验报告并上传程序，实验报告要求写出操作步骤、结果、问题、解决方法、体会等。2、实验仪器、设备或软件计算机、VC+6Qoffice、相关的操作系统等。二、实验过程（实验步骤、记录、数据、分析）#include<iostream>#include<fstream>#include<iomanip>usingnamespacestd;#defineMAX_ERROR_MESSAGE_LEN100classErrorprivate:charmessageMAX_ERROR_MESSAGE_LEN;public:

4、Error(charmes="一般性异常！")strcpy(message,mes);voidShow()constcout<<message<<endl;charGetChar(istream&in=cin)charch;while(ch=in.peek()!=EOF&&(ch=in.get()=''|ch='/t');returnch;boolUserSaysYes()charch;boolinitialResponse=true;doif(initialResponse)cout<&

5、lt;"(y,n)?"elsecout<<"用y或n回答："while(ch=GetChar()='/n');initialResponse=false;while(ch!='y'&&ch!='Y'&&ch!='n'&&ch!='N');while(GetChar()!='/n')if(ch='y'|ch='Y')returntrue;elsereturnfalse;c

6、lassStaffprotected:charnum8;charname12;intage;public:Staff()virtualStaff()constchar*GetNum()constreturnnum;virtualvoidInput()=0;virtualvoidShow()const=0;virtualvoidRead(fstream&f)const=0;virtualvoidWrite(fstream&f)const=0;classEngineer:virtualpublicStaffprotected:charmajor12;charprof12;publi

7、c:Engineer()virtualEngineer()voidInput()cout<<"编号:"cin>>num;cout<<"姓名:"cin>>name;cout<<"年龄:"cin>>age;cout<<"专业:"cin>>major;cout<<"职称:"cin>>prof;voidShow()constcout<<setw(8)<<num&

8、lt;<setw(12)<<name<<setw(5)<<age<<setw(12)<<major<<setw(12)<<prof<<endl;voidRead(fstream&f)constf.read(char*)this,sizeof(Engineer);voidWrite(fstream&f)constf.write(char*)this,sizeof(Engineer);classLeader:virtualpublicStaffprotected:charjob12

9、;chardep12;public:Leader()virtualLeader()voidInput()cout<<"编号："；cin>>num;cout<<"姓名："；cin>>name;cout<<"年龄："；cin>>age;cout<<"职务："；cin>>job;cout<<"部门："；cin>>dep;)voidShow()const(cout<<set

10、w(8)<<num<<setw(12)<<name<<setw(5)<<age<<setw(12)<<job<<setw(12)<<dep<<endl;)voidRead(fstream&f)constf.read(char*)this,sizeof(Leader);voidWrite(fstream&f)constf.write(char*)this,sizeof(Leader);classChairman:publicEngineer,publicLead

11、erpublic:Chairman()virtualChairman()voidInput()cout<<"编号:"cin>>num;cout<<"姓名："；cin>>name;cout<<"年龄："；cin>>age;cout<<"专业:"；cin>>major;cout<<"职称："；cin>>prof;cout<<"职务："；cin>

12、>job;cout<<"部门："；cin>>dep;voidShow()constcout<<setw(8)<<num<<setw(12)<<name<<setw(5)<<age<<setw(12)<<major<<setw(12)<<prof<<setw(12)<<job<<setw(12)<<dep<<endl；voidRead(fstream&f)con

13、stf.read(char*)this,sizeof(Chairman);voidWrite(fstream&f)constf.write(char*)this,sizeof(Chairman);structIndexTypebooldelTag;charnum8;intposition;charstaffType;#defineNUM_OF_INCREMENT1000classStaffManageprivate:fstreamfile;IndexType*indexTable;intmaxSize;intcount;voidAddIndexItem(constIndexType&a

14、mp;e);voidAddData();voidUpdataData();voidSearchData();voidDeleteData();voidPack();public:StaffManage();virtualStaffManage();voidRun();StaffManage:StaffManage()ifstreamindexFile("staff.idx",ios:binary);if(!indexFile.fail()indexFile.seekg(0,ios:end);count=indexFile.tellg()/sizeof(IndexType);

15、maxSize=count+NUM_OF_INCREMENT;indexTable=newIndexTypemaxSize;indexFile.seekg(0,ios:beg);inti=0;indexFile.read(char*)&indexTablei+,sizeof(IndexType);while(!indexFile.eof()indexFile.read(char*)&indexTablei+,sizeof(IndexType);indexFile.close();elsecount=0;maxSize=count+NUM_OF_INCREMENT;indexTa

16、ble=newIndexTypemaxSize;ifstreamiFile("staff.dat");if(iFile.fail()ofstreamoFile("staff.dat");if(oFile.fail()throw("打开文件失败!");oFile.close();elseiFile.close();file.open("staff.dat",ios:in|ios:out|ios:binary);if(file.fail()throw("打开文件失败!");StaffManage:S

17、taffManage()ofstreamindexFile("staff.idx",ios:binary);for(inti=0;i<count;i+)indexFile.write(char*)&indexTablei,sizeof(IndexType);indexFile.close();file.close();voidStaffManage:AddIndexItem(constIndexType&e)if(count>=maxSize)maxSize+=NUM_OF_INCREMENT;IndexType*tmpIndexTable=ne

18、wIndexTypemaxSize;for(inti=0;i<count;i+)tmpIndexTablei=indexTablei;deleteindexTable;indexTable=tmpIndexTable;indexTablecount+=e;voidStaffManage:AddData()Staff*pStaff;IndexTypeitem;item.delTag=false;file.seekg(0,ios:end);dodocout<<"人员类型(e:工程师,l:领导,c:主任工程师);"cin>>item.staffTyp

19、e;item.staffType=tolower(item.staffType);while(item.staffType!='e'&&item.staffType!='l'&&item.staffType!='c');if(item.staffType='e')pStaff=newEngineer;elseif(item.staffType='l')pStaff=newLeader;elsepStaff=newChairman;pStaff->Input();strcpy(i

20、tem.num,pStaff->GetNum();item.position=file.tellg();AddIndexItem(item);pStaff->Write(file);deletepStaff;cout<<"继续添加吗"while(UserSaysYes();voidStaffManage:UpdataData()Staff*pStaff;IndexTypeitem;item.delTag=false;charnum12;cout<<"人员编号:"cin>>num;intpos;for(pos

21、=0;pos<count;pos+)if(strcmp(num,indexTablepos.num)=0&&!indexTablepos.delTag)break;if(pos<count)file.seekg(indexTablepos.position,ios:beg);if(indexTablepos.staffType='e')pStaff=newEngineer;elseif(indexTablepos.staffType='l')pStaff=newLeader;elsepStaff=newChairman;pStaff-

22、>Read(file);pStaff->Show();docout<<"人员类型(e:工程师,l:领导,c:主任工程师);"cin>>item.staffType;item.staffType=tolower(item.staffType);while(item.staffType!='e'&&item.staffType!='l'&&item.staffType!='c');if(item.staffType='e')pStaff=newEn

23、gineer;elseif(item.staffType='l')pStaff=newLeader;elsepStaff=newChairman;pStaff->Input();if(item.staffType=indexTablepos.staffType)strcpy(indexTablepos.num,pStaff->GetNum();file.seekg(indexTablepos.position,ios:beg);elseindexTablepos.delTag=true;strcpy(item.num,pStaff->GetNum();file

24、.seekg(0,ios:end);item.position=file.tellg();AddIndexItem(item);pStaff->Write(file);deletepStaff;elsecout<<"查无此人!"<<endl;file.clear();voidStaffManage:SearchData()Staff*pStaff;charnum12;cout<<"人员编号:"cin>>num;intpos;for(pos=0;pos<count;pos+)if(strcmp(n

25、um,indexTablepos.num)=0&&!indexTablepos.delTag)break;if(pos<count)file.seekg(indexTablepos.position,ios:beg);if(indexTablepos.staffType='e')pStaff=newEngineer;elseif(indexTablepos.staffType='l')pStaff=newLeader;elsepStaff=newChairman;pStaff->Read(file);pStaff->Show()

26、;deletepStaff;elsecout<<"查无此人!"<<endl;file.clear();voidStaffManage:DeleteData()Staff*pStaff;IndexTypeitem;item.delTag=false;charnum12;cout<<"人员编号:"cin>>num;intpos;for(pos=0;pos<count;pos+)if(strcmp(num,indexTablepos.num)=0&&!indexTablepos.delTag

27、)break;if(pos<count)file.seekg(indexTablepos.position,ios:beg);if(indexTablepos.staffType='e')pStaff=newEngineer;elseif(indexTablepos.staffType='l')pStaff=newLeader;elsepStaff=newChairman;pStaff->Read(file);cout<<"被删除记录为:"<<endl;pStaff->Show();indexTabl

28、epos.delTag=true;deletepStaff;cout<<"删除成功!"<<endl;elsecout<<"删除失败!"<<endl;file.clear();voidStaffManage:Pack()ofstreamoFile("tem.dat");oFile.close();fstreamoutFile("tem.dat",ios:app|ios:binary);Staff*pStaff;intcur_count=0;for(intpos=0;po

29、s<count;pos+)if(!indexTablepos.delTag)file.seekg(indexTablepos.position,ios:beg);indexTablepos.position=file.tellg();if(indexTablepos.staffType='e')pStaff=newEngineer;elseif(indexTablepos.staffType='l')pStaff=newLeader;elsepStaff=newChairman;pStaff->Read(file);pStaff->Write(

30、outFile);deletepStaff;indexTablecur_count+=indexTablepos;count=cur_count;file.close();outFile.close();remove("staff.dat");rename("tem.dat","staff.dat");file.open("staff.dat",ios:in|ios:out|ios:binary);voidStaffManage:Run()intselect;docout<<"请选择:&quo

31、t;<<endl;cout<<"1.增加数据"<<endl;cout<<"2.更新数据"<<endl;cout<<"3.查询数据"<<endl;cout<<"4.删除数据"<<endl;cout<<"5.重组文件"<<endl;cout<<"6.退出"<<endl;cin>>select;while(cin.get()!='n');switch(select)case 1:AddData();break;case 2:UpdataData();break;case 3:SearchData();break;case 4:DeleteData();break;case 5:Pack();break;while(select!=6);intmain()tryStaffManageobjStaffManage;objStaffManage.Run();catch(Errorerr)err.Show();system("PAUSE");return0;三、结论