#include <iostream.h>             
#include <string.h>
#include <windows.h>
class person                      // class of persons
   {
   private:
      enum {SIZE=40};             // size of name buffer
      char name[SIZE];            // person's name
      char book[SIZE];
      int age;                    // person's age
   public:
    	   person() {}
	   person(char* na, char* bk, int nu) : age(nu)
            { strcpy(name, na), strcpy(book, bk); }

 	   char* get_name()    { return name; } 	
	   char* get_book()    { return book; } 	
	   int get_age() const { return age; }

      void getData()              // get data from keyboard
         {
         cout << "\n   Enter name: ";
	cin >> name;//cin.getline(name, SIZE);
	cout << "\n   Enter book: "; cin >> book;
         cout << "   Enter age: ";  cin >> age;
         cin.ignore(10, '\n');
         }
      void putData()   const      // display data on screen
      {
         cout << "\n   Name = " << name;
         cout << "\n   Book = " << book;
         cout << "\n   Age = " << age;
      }

      friend istream& operator >> (istream& s, person& d);
      friend ostream& operator << (ostream& s, person& d);
      person operator+(const person & second);
      bool operator==(person&);
      void persin(istream& s)     // read file into ourself
      {
         s.read( (char*)this, sizeof(*this) );                                // data from file
       }
      void persout(ostream& s)    // write our data to file
      {
         s.write( (char*)this, sizeof(*this) );
      }
};
class Borrowb {
   private:
      enum {SIZE=100};         // size of array
      person* arr[SIZE];       // define array
      int total;               // number of objects in array
   public:
      Borrowb() : total(0) { }
      person* operator[](int) const;
      void insert(person*);
      person* search_name(char *); 
      person* search_age(int);
};

person* Borrowb::operator[](int n) const
   { return arr[n]; }

void Borrowb::insert(person* data)
{
   int j = 0;
   // find correct place
   while(j < total && data->get_age() > arr[j]->get_age() )   
      j++;
   for(int k=total; k>j; k--) // move higher elements up
      arr[k] = arr[k-1];
   arr[j] = data;             // insert new data
   total++;                   // now it has one more element
}

person* Borrowb::search_age(int num_to_find)
{
   for(int i = 0; i < 10; i++) {
	  person* ptr = arr;             // get ptr to person
      int num = ptr ->get_age();
	  if(num == num_to_find)          
         return ptr;                  
	}
   return NULL;                       
}

//this is a big bug that I can't find, why can't return it's ptr
person* Borrowb::search_name(char* name_to_find)
{
	//person per1(name_to_find," ",24),per2(" "," ",25);
	
	for(int i = 0; i < 10; i++) {
         person* ptr = arr;             // get ptr to person
         //per2.name = ptr -> get_name();
         char* name = ptr ->get_name();
	if(name == name_to_find)          
         return ptr;                  
         }
      return NULL;
}


person person::operator+(const person& second)
{
	person temp;
	int i = 0, j = 0;
	//char* a = new char[40];
	char a[40]; 
	char b[40];
	char* string3;

	cout << "input first string" << endl;
	cin >> a ;
	cout << "input second string" << endl;
	cin >> b ;
	string3 = strcat(a, b);
	cout << string3;
	return temp;
}

bool person::operator==(person& second)
{
    return(strcmp(this -> name, second.name) == 0);
}

// get data from disk
istream& operator >> (istream& s, person& d)
{
   d.persin(s);
   return s;
}

// write data to disk
ostream& operator << (ostream& s, person& d)
{
   d.persout(s);
   return s;
}

void main(void)
{  
   Borrowb sa;
   person* pemp; 
   char name[30], choice;
   int num;
   //search_ name, search_book, search_age
   // array of persons   //overloading [] 
   person perarr[10] =     
     { person("Webley", "Mfc book" , 46),    
       person("Suzuki", "Math book" , 67),  
       person("Smith", "Chinese book" ,37),
       person("Gonzalez", "English book", 27),
       person("Wong", "Computer book", 43),
       person("LeMonde", "Science book", 78),
       person("Weinstein", "Art book" , 14),
       person("DeCarlo", "Physical book" , 22),
       person("Nguyen", "Philophy book" , 39),
       person("O'Grady", "Algorithm book" , 57) };
   //insert ten data
   for(int j=0; j<10; j++)       // insert address of each
      sa.insert(perarr+j);      // person into SortedArray

   //display ten data
   for(int i=0; i<10; i++)       // display data in order
   {
      cout << "\nperson " << (i+1);
      sa->putData();
   }
   
   do {
   cout << "\n  'N'search_age  \n 'M'search_name  \n 'Q'exit " << endl;
   cout << "Which is your choice?" ;
   cin >> choice; choice = toupper(choice);   
   if (choice == 'Q') break;
   switch(choice)
   {
   case 'N':
	   cout << "enter query num" << endl ;   //query age
	   cin >> num;
	   pemp = sa.search_age(num);   
	   if(pemp != NULL)
	   {
	       cout << "\nPerson with that number is";
		   pemp->putData();
	   }
	   else
	       cout << "\n No such peson name in database.";
	   break;
   case 'M':
          //query name
	cout << "enter query name" << endl ;  		cin >> name;
	pemp = sa.search_name(name);   
	if(pemp != NULL)
	{
	   cout << "\nPerson with that name is";
	   pemp->putData();
         }
	else
	   cout << "\n No such peson name in database.";
	   break;
	default: break;
    }
   }while (true);  
}  
</pre>




<SPAN CLASS=editedby>[edited by - doublin_ken &#111;n October 24, 2002 10:43:02 AM]</SPAN>  </i>   </pre>