arraydb.cc

C++ class and storage

//arrayDB.cc
//ECE106 Lab#5
//Name: Mo Li
//Student#: 995447379
//Date:Mar.09,2007
#include<iostream>
#include"arrayDB.h"
using namespace std;
studentDB::studentDB()
{
   _next_index=0;
   probesCount=0;
}

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

bool studentDB::insert(studentRecord *newRecord)
{
   for(int i=0;i<_next_index;i++)
   {
      if(newRecord->getStudentNumber()==_arrayDB[i]->getStudentNumber())
      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 studentDB::retrieve(unsigned int studentNum, studentRecord* searchRecord)
{
   for(probesCount=0;probesCount<_next_index;probesCount++)
   {
      if(_arrayDB[probesCount]->getStudentNumber()==studentNum)
      {
         searchRecord->setStudentNumber(_arrayDB[probesCount]->getStudentNumber());
         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 studentDB::remove(unsigned int studentNum)
{
   for(int i=0;i<_next_index;i++)
   {
     if(_arrayDB[i]->getStudentNumber()==studentNum)
     {
        delete _arrayDB[i];
        while(i<_next_index-1)
        {
           _arrayDB[i]=_arrayDB[i+1];
           i++;
        }
        _next_index--;
       return true;
     }
   }
   return false;
}
void studentDB::clear()
{
   for(int i=0;i<_next_index;i++)
   delete _arrayDB[i];
}

bool studentDB::isEmpty()
{
   return _next_index==0;
}
bool studentDB::isFull()
{
   return _next_index==MAX_NUM_OF_STUDENTS;
} 
void studentDB::printProbes()
{
   cout <<probesCount+1<<endl;
}

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