gzgl.cpp

工资管理系统代码。利用面向对象的方法以及C++的编程思想来完成系统的设计。

#include <fstream.h>
#include <string.h>

class Person  //人员类(抽象类)
{
protected:
  int No;         //编号
  char Name[20];  //姓名
  int Duty;                     //人员类别标志(0-教师,1-实验员,2-行政人员,3-教师兼实验员,4-行政兼教师)
  double Salary;     //基本工资
  Person *next;            //指针域

public:
  Person()  //基类构造
  {
    next=0;  //指针域设置为空
  }
  virtual ~Person()  //基类虚析构
  {
  }
  virtual void Input()=0;                //从键盘输入数据
  virtual void Input(ifstream& ifs)=0;   //从文件输入数据
  virtual void Output()=0;               //向屏幕输出数据
  virtual void Output(ofstream& ofs)=0;  //向文件输出数据
  virtual double Incoming()=0;           //计算收入

  friend class College;
};

class Teacher:virtual public Person  //教师类
{
protected:
  int Hours;  //教师课时

public:  
  //为对象设置数据分为两种途径，通过1)构造函数，2)一般成员函数
  //分开可以使得程序中应用更加灵活
  //本程序采用:缺省构造+Input()
  Teacher()  //构造函数，初始化部分数据
  {
         Duty=0;  
    Salary=800;
  }

  void Input()  //键盘补充输入其它数据
  {
    cout<<"编号:";  cin>>No;
    cout<<"姓名:";  cin>>Name;
    cout<<"教师上学期课时:";  cin>>Hours;
  } 

  void Input(ifstream& ifs)
  {
    ifs>>No>>Name>>Duty>>Hours;
  } 

  void Output()
  {
    cout<<No<<"\t"<<Name<<"\t"<<Duty<<"\t"<<Hours<<"\t"<<Incoming()<<endl;
  }

  void Output(ofstream& ofs)
  {
    ofs<<No<<"\t"<<Name<<"\t"<<Duty<<"\t"<<Hours<<"\t"<<endl;
  }

  double Incoming()
  {
    return Salary+(Hours-120)*20;
  }
};

class Assistant:virtual public Person  //实验员
{
protected:
  int Allowance;
  int Hours;

public:
  Assistant()
  {
         Duty=1;    
    Salary=650;
    Allowance=150;
  }
  
  void Input()
  {
    cout<<"编号:";  cin>>No;
    cout<<"姓名:";  cin>>Name;
    cout<<"实验员上学期实验课时:";  cin>>Hours;
  }

  void Input(ifstream& ifs)  
  {
    ifs>>No>>Name>>Duty>>Hours;
  } 

  void Output()
  {
    cout<<No<<"\t"<<Name<<"\t"<<Duty<<"\t"<<Hours<<"\t"<<Incoming()<<endl;
  }

  void Output(ofstream& ofs)
  {
    ofs<<No<<"\t"<<Name<<"\t"<<Duty<<"\t"<<Hours<<"\t"<<endl;
  }

  double Incoming()
  {
    return Salary+Allowance+(Hours-70)*20;
  }
};

class Manager:virtual public Person  //行政人员
{
protected:
  int Allowance;

public:
  Manager()
  {
        Duty=2;
    Salary=750;
    Allowance=250;
  }

  void Input()
  {
    cout<<"编号:";  cin>>No;
    cout<<"姓名:";  cin>>Name;
  }

  void Input(ifstream& ifs)  
  {
    ifs>>No>>Name>>Duty;
  } 

  void Output()
  {
    cout<<No<<"\t"<<Name<<"\t"<<Duty<<"\t"<<Incoming()<<endl;
  }

  void Output(ofstream& ofs)
  {
    ofs<<No<<"\t"<<Name<<"\t"<<Duty<<"\t"<<endl;
  }

  double Incoming()
  {
    return Salary+Allowance;
  }
};

class Teacher_Assistant:public Teacher,public Assistant //教师兼实验员
{
public:
  Teacher_Assistant()
  {
         Duty=3;
    Teacher::Salary=800;
  }
  void Input()
  {
    cout<<"编号:";  cin>>No;
    cout<<"姓名:";  cin>>Name;

cout<<"教师上学期课时:";  cin>>Teacher::Hours;
    cout<<"教师兼职实验员上学期实验课时:";  cin>>Assistant::Hours;
  }

  void Input(ifstream& ifs)  
  {
    ifs>>No>>Name>>Duty>>Teacher::Hours>>Assistant::Hours;
  } 

  void Output()
  {
    cout<<No<<"\t"<<Name<<"\t"<<Duty<<"\t"<<Teacher::Hours<<"\t"
      <<Assistant::Hours<<"\t"<<Incoming()<<endl;
  }

  void Output(ofstream& ofs)
  {
    ofs<<No<<"\t"<<Name<<"\t"<<Duty<<"\t"<<Teacher::Hours<<"\t"
      <<Assistant::Hours<<"\t"<<endl;
  }

  double Incoming()
  {
    return Salary+(Teacher::Hours-120)*20
      +Allowance+(Assistant::Hours-70)*20;
  }
};

class Manager_Teacher:public Manager,public Teacher //行政人员兼教师
{
public:
  Manager_Teacher()
  {
         Duty=4;
    Manager::Salary=750;
  }

  void Input()
  {
    cout<<"编号:";  cin>>No;
    cout<<"姓名:";  cin>>Name;
    cout<<"行政人员兼职教师上学期课时:";  cin>>Hours;
  }

  void Input(ifstream& ifs)  
  {
    ifs>>No>>Name>>Duty>>Hours;
  } 

  void Output()
  {
    cout<<No<<"\t"<<Name<<"\t"<<Duty<<"\t"<<Hours<<"\t"<<Incoming()<<endl;
  }

  void Output(ofstream& ofs)
  {
    ofs<<No<<"\t"<<Name<<"\t"<<Duty<<"\t"<<Hours<<"\t"<<endl;
  }

  double Incoming()
  {
    return Salary+Allowance+Hours*20;
  }
};

class College
{
private:
  Person *PL;
  void Clear();
  int College::Find(int ID,Person **p1,Person **p2);
public:
  College();      //构造
  ~College();     //析构
  void Add();     //增加职工
  void Delete();  //删除职工
  void Modify();  //修改职工
  void Print();   //输出职工信息
  void Save();    //职工信息存盘
  void Load();    //职工信息装入
};

College::College()  //构造函数(创建1个头结点的链表)
{
  Person *p=new Teacher;
  PL=p;

  cout<<"自动装入数据...\n";
  Load();
}

College::~College() //析构函数(仅保留1个头结点)
{
  Person *p=PL;
  while(p)  //逐个删除结点，包括头结点
  {
    PL=p->next;
    delete p;
    p=PL;
  }
  PL=0;
}

void College::Add()  //增加职工
{
  cout<<"\n** 增加职工 **\n";

  //查找尾结点
  Person *p=PL;
  while(p->next)p=p->next;

  int ch;
  cout<<"输入职工分类码[0-教师,1-实验员,2-行政人员,3-教师兼实验员,4-行政兼教师]:";  cin>>ch;
  //创建新结点,录入数据,连接到链表
  Teacher *pt;
  Assistant *pa;
  Manager *pm;
  Teacher_Assistant *pta;
  Manager_Teacher *pmt;
  switch(ch)
  {
    case 0:  pt=new Teacher;   pt->Input();
      p->next=pt;  
      break;
    case 1:  pa=new Assistant; pa->Input();
      p->next=pa;  
      break;
    case 2:  pm=new Manager;   pm->Input();
      p->next=pm;  
      break;
    case 3:  pta=new Teacher_Assistant;  pta->Input();
    p->next=pta; 
      break;
    case 4:  pmt=new Manager_Teacher;  pmt->Input();
      p->next=pmt;
      break;
    default:  return;
  }
}

void College::Clear() //清除所有的职工结点(仅保留头结点)
{
  Person *p=PL->next;
  while(p)
  {
    PL->next=p->next;
    delete p;
    p=PL->next;
  }
}

//查找职工结点(返回1-找到，0-未找到.结点指针由p1返回,p2为前看指针)
int College::Find(int ID,Person **p1,Person **p2)   
{
  *p1=PL->next;
  *p2=PL;
  while(*p1)
  {
    if((*p1)->No==ID)
      break;  //找到
    else 
    {
      *p2=*p1;  //继续查找
      *p1=(*p1)->next;
    }
  }
  return *p1?1:0;
}

void College:elete()   //删除职工
{
  cout<<"\n** 删除职工 **\n";

  int No;
  Person *p1,*p2;
  
  cout<<"编号:";  cin>>No;
  if(!Find(No,&p1,&p2))
  {
    cout<<"指定的人员没有找到!\n";
  }
  else
  {
    p2->next=p1->next;  //连接
    delete p1;
    cout<<"正确删除!\n";
  }
}

void College::Modify()   //修改职工
{
  cout<<"\n** 修改职工 **\n";

  int No;
  Person *p1,*p2;
  
  cout<<"编号:";  cin>>No;
  if(!Find(No,&p1,&p2))
  {
    cout<<"指定的人员没有找到!\n";
  }
  else
  {
    p1->Output();  //输出原来的职工信息(做提示)
    p1->Input();  //输入新的职工信息(更新)
    cout<<"修改完成!\n";
  }
}

void College:rint()    //输出职工信息
{
  cout<<"\n** 职工信息表 **\n";
  cout<<"编号 姓名 岗位 其它 收入情况\n";

  Person *p=PL->next;
  if(!p)
  {
    cout<<"无职工记录!\n";
    return;
  }

  while(p)  //遍历链表，输出职工信息
  {
    p->Output();
    p=p->next;
  }
}

void College::Save()     //职工信息存盘
{
  ofstream f("erson.dat",ios:ut);  //打开文件

  //遍历输出至文件
  Person *p=PL->next;
  while(p)  
  {
    p->Output(f);
    p=p->next;
  }

  f.close();  //关闭文件

  cout<<"职工信息已经保存在Person.dat.\n";
}
void Collegead()     //职工信息装入
{
  char buf[81];  //临时空间
  int Duty;    //人员类型
  Person *p2;  //新建结点的指针
  long t;  //读写位置

  //清除现有结点(保留头结点)
  Clear();  

  //打开文件
  ifstream f("erson.dat",ios::in);
    
  //建立结点，读数据
  Person *p=PL; //尾结点指针
  while(1)
  {
    //读取人员类型
    t=f.tellg();
    f>>buf>>buf>>Duty;

    if(f)
    {
      //根据人员类型创建新结点
      switch(Duty)
      {
        case 0:  p2=new Teacher; break;
        case 1:  p2=new Assistant; break;
        case 2:  p2=new Manager; break;
        case 3:  p2=new Teacher_Assistant; break;
        case 4:  p2=new Manager_Teacher; break;
        default:  f.close();  return;
      }
      p->next=p2;
      p=p->next;
      f.seekg(t);
      p->Input(f);     
    }
    else
      break;   
  }

  //关闭文件
  f.close();
}


void main()
{
  char ch;
  College c;  //定义大学对象

  //显示主菜单，接受选择，并分支调用大学类的相应功能的成员函数
  do
  {
    cout<<"\n☆☆ 高校工资管理系统 ☆☆\n";
    cout<<"1－增加职工\n";
    cout<<"2－删除职工\n";
    cout<<"3－修改职工\n";
    cout<<"4－输出职工信息(工资)\n";
    cout<<"5－数据存盘\n";
    cout<<"6－数据装入\n";
    cout<<"7－退出\t请选择(1-7):";

    cin>>ch;
    switch(ch)
    {
      case '1':  c.Add();   break;
      case '2':  c.Delete();break;
      case '3':  c.Modify();break;
      case '4':  c.Print(); break;
      case '5':  c.Save();  break;
      case '6':  c.Load();  break;
    }
  }while(ch!='7');
}