db.cc

C++ class and storage

//DB.cc
#include <iostream>
#include <string>
#include "DB.h"
using namespace std;
       
//---------------------------------------------------------------------------------------------------
DB::DB()
{
   _next_index=0;
   
}

DB::~DB()
{
   for(int i=0;i<_next_index;i++)
   delete _arrayDB[i];
}

bool DB::insert(Record *newRecord)
{
   for(int i=0;i<_next_index;i++)
   {
      if(newRecord->getNumber()==_arrayDB[i]->getNumber())
      return false;
   }
   if(_next_index!=MAX_NUM_OF_STUDENTS)
   {
       _arrayDB[_next_index]=newRecord;
       _next_index++;
       return true;
   }
   else
   cout <<"Error: database is full.\n";
}
bool DB::retrieve(unsigned int Num, Record* &searchRecord)
{
   for(probesCount=0;probesCount<_next_index;probesCount++)
   {
      if(_arrayDB[probesCount]->getNumber()==Num)
      {
         searchRecord->setNumber(_arrayDB[probesCount]->getNumber());
         searchRecord->setFirstName(_arrayDB[probesCount]->getFirstName());
         searchRecord->setLastName(_arrayDB[probesCount]->getLastName());
         searchRecord->setFirstName(_arrayDB[probesCount]->getFirstName());
         for(int i=0;i<5;i++)
         searchRecord->setMark(i,_arrayDB[probesCount]->getMark(i));
         return true;
      }
   }
   return false;
}

bool DB::remove(unsigned int Num)
{
   for(int i=0;i<_next_index;i++)
   {
     if(_arrayDB[i]->getNumber()==Num)
     {
        delete _arrayDB[i];
        while(i<_next_index-1)
        {
           _arrayDB[i]=_arrayDB[i+1];
           i++;
        }
        _next_index--;
       return true;
     }
   }
   return false;
}
void DB::clear()
{
   for(int i=0;i<_next_index;i++)
   delete _arrayDB[i];
}

bool DB::isEmpty()
{
   return _next_index==0;
}
bool DB::isFull()
{
   return _next_index==MAX_NUM_OF_STUDENTS;
} 

void DB::dump()
{
   for(int i=0;i<_next_index;i++)
   {
      _arrayDB[i]->print();
      cout<<endl;
   }
}

//---------------------------------------------------------------------------------------------------