xqd.cpp

复数计算器：1、设计的任务要求 (1) 所设计的复数计算器可以进行+、-、*、+=、-=、*=、++、--、>=、<=、==、!=运算符

#include<iostream>
#include<fstream>
#include<string>
#include<iomanip>

using namespace std;

struct LNode
{
  char name[20];
  char phonenumber[20];
  struct LNode *prior;
  struct LNode *next;
};
typedef struct LNode* LN;

class  Imf
{
  LN head;
 public:
  Imf()
  {
    head=new struct LNode;
    head->next=head;
    head->prior=head;
  }
  ~Imf();
  void Addnew_message();
  void Insert_message(LN L);
  void Delete_message();
  void Display_message();
  void Search_message();
  void File_close();
};

Imf::~Imf()
{
  LN p,s;
  p=head->next;
  while(p!=head)
    {
      s=p->next;
      delete p;
      p=s;
    }
  delete head;
}

void  Imf::Addnew_message()
{ system("clear");
  char c[20]={'y'};
   LN p;
  while(c[0]=='Y'||c[0]=='y')
   { p=new struct LNode;
     cout<<"Please input name:\n";
     cin>>p->name;
     cout<<"Please input phonenumber:\n";
     cin>>p->phonenumber;
     Insert_message(p);
     cout<<"Continue(y/n):";
     cin>>c;
     while(strlen(c)>1||(c[0]!='Y'&&c[0]!='y'&&c[0]!='N'&&c[0]!='n'))
       { cout<<"Input error!Input again!\n";
         cout<<"Continue(y/n):";
         cin>>c; 
       } 
   } 
}

void Imf::Insert_message(LN L)
{
  if(head->next==head)
    { head->next=L;
      head->prior=L;
      L->prior=head;
      L->next=head;       
    }
  else
    {
      L->prior=head;
      L->next=head->next;
      head->next=L;
      L->next->prior=L;
    }
}

void  Imf::Display_message()
{
  LN p;
  p=head->next;
  system("clear");
  while(p!=head)
    {
      cout<<"\n\tName:"<<p->name<<endl;
      cout<<"\t Tel:"<<p->phonenumber<<endl;
      p=p->next;    
    }
  cout<<"Enter any key to exit!\n";
  cin.get();
  cin.get();
}

void  Imf::Delete_message()
{ char ch[20],c[20]={'y'};
  LN p;
  system("clear");
  while(c[0]=='Y'||c[0]=='y')
    {
      cout<<"Input the name or the phonenumber!\n";
      cin>>ch;
      p=head->next;
      while(p!=head)
	{ 
	  if(strcmp(p->name,ch)==0||strcmp(p->phonenumber,ch)==0)
	    {  
	      p->prior->next=p->next;
	      p->next->prior=p->prior;
	      delete p;
	      cout<<"The message has been deleted!\n ";
	      break;
	    }
	  else
	    p=p->next;
	}
      if(p==head&&(ch!=p->name||ch!=p->phonenumber)) 
	cout<<"No this message!\n";
      cout<<"Continue(y/n):";
      cin>>c;
      while(strlen(c)>1||(c[0]!='Y'&&c[0]!='y'&&c[0]!='N'&&c[0]!='n'))
       { cout<<"Input error!Input again!\n";
         cout<<"Continue(y/n):";
         cin>>c; 
       } 
    }
}

void Imf::Search_message()
{ char ch[20],c[20]={'y'};
  LN p;
  system("clear");
  while(c[0]=='Y'||c[0]=='y')
    {
      cout<<"Input the name or the phonenumber!\n";
      cin>>ch;
      p=head->next;
      while(p!=head)
	{ 
	  if(strcmp(p->name,ch)==0||strcmp(p->phonenumber,ch)==0)
	    { cout<<"\tName:"<<p->name<<endl;
	      cout<<"\t Tel:"<<p->phonenumber<<endl<<endl;  
	      break; 
	    }
	  p=p->next;
	}
      if(p==head) 
	cout<<"No this message!\n";
      cout<<"Continue(y/n):";
      cin>>c;
      while(strlen(c)>1||(c[0]!='Y'&&c[0]!='y'&&c[0]!='N'&&c[0]!='n'))
	{ cout<<"Input error!Input again!\n";
	  cout<<"Continue(y/n):";
 	  cin>>c; 
	} 
    }
  /* cout<<"Enter any key to exit!\n";
  cin.get();
  cin.get();*/
}
 
 void Imf::File_close()
{ LN p;
  p=head->next;
  ofstream outfile("friends.dat",ios::binary);
  if(!outfile)
    {
      cout<<"Oper error!"<<endl;
      abort();
    }

  while(p!=head)
    {
      outfile.write((char *)p,sizeof(struct LNode));  
      p=p->next; 
    }

 outfile.close();
}


int main()
{
  char choise[10];
  Imf D; 
  LN L;
  ifstream infile("friends.dat",ios::binary);
  if(!infile)
   {
     cout<<"Open error!"<<endl;
   }
  else
    {
      while(1)
	{ L=new struct LNode;
	  infile.read((char *)L,sizeof(struct LNode));       	
	   if(infile.eof()) 
	   break;
	   else  D.Insert_message(L);
	}
    }
     
   while(1)
     {system("clear"); 
      cout<<"\n\n\n\t***********************PHONE BOOK**************************\n\n\n";
      cout<<"\t     1: ADD NEW RECORD\n\n";
      cout<<"\t     2: DISPLAY ALL RECORDS\n\n";
      cout<<"\t     3: DELETE SOME MESSAGE\n\n";
      cout<<"\t     4: SEARCH FOR USEFUL MESSAGE\n\n";
      cout<<"\t     5: EXIT\n\n\n";
      cout<<"\t***********************************************************\n\n\n";
      cout<<"Please chiose from 1 to 5:";
      cin>>choise;
      while(strlen(choise)>1||choise[0]<'1'||choise[0]>'5')
	{ cout<<"Input error!Input again!\n";
	  cout<<"Please chiose frome 1 to 5:"; 
	  cin>>choise;
	}  
      switch(choise[0]-'0')
	{
	case 1:D.Addnew_message();break;
	case 2:D.Display_message();break;
	case 3:D.Delete_message();break;
	case 4:D.Search_message();break;
        case 5:D.File_close();exit(0);
	default:break;
	}
    } 
}