driver.cc

C++ class and storage

//Driver.cc
#include<iostream>
#include<string>
#include"DB.h"
#include""
using namespace std;
DB database;
int main()
{
   string command;
   cin >> command;
   while(!cin.eof())
   {  if(command=="new"||command=="New")
   {
      int StuNum;
      cin>>StuNum;
      studentRecord* temp_ptr=new studentRecord;
      temp_ptr->setStudentNumber(StuNum);
      if(!database.insert(temp_ptr))
      {
         cout<<"Error: a record with student number "<<StuNum<<" already exists.\n";
         delete temp_ptr;
      }
   } 
   else if(command=="locate"||command=="Locate")
   {
      int StuNum;
      cin>>StuNum;
      studentRecord* temp_ptr=new studentRecord;
      if(database.retrieve(StuNum, temp_ptr))
      temp_ptr->print();
      else
      cout <<"Error: no record with student number "<<StuNum<<" exists.\n";
   }
   else if(command=="updatename"||command=="Updatename")
   {
      int StuNum;
      string lname, fname;
      cin>>StuNum>>lname>>fname;
      studentRecord* temp_ptr=new studentRecord;
      if(database.retrieve(StuNum, temp_ptr))
      {
          temp_ptr->setLastName(lname);
          temp_ptr->setFirstName(fname);
          temp_ptr->print();
          database.remove(StuNum);
          database.insert(temp_ptr);
      }
      else
      cout <<"Error: no record with student number "<<StuNum<<" exists.\n";
   }    
   else if(command=="updatemark"||command=="Updatemark")
   {
      int StuNum, idx, mark;
      cin>>StuNum>>idx>>mark;
      studentRecord* temp_ptr=new studentRecord;
      if(!database.retrieve(StuNum, temp_ptr)) 
      cout <<"Error: no record with student number "<<StuNum<<" exists.\n";     
      else if(idx<0||idx>4)
      cout<<"Error: "<<idx<<" is out of the range 0-4.\n";
      else if(mark<0||mark>100)
      cout<<"Error: "<<mark<<" is out of the range 0-100.\n";
      else
      {
         temp_ptr->setMark(idx, mark);
         temp_ptr->print();
         database.remove(StuNum);
         database.insert(temp_ptr);
      } 
   }
   else if(command=="delete"||command=="Delete")
   {
      int StuNum;
      cin>>StuNum;
      if(!database.remove(StuNum))
      cout <<"Error: no record with student number "<<StuNum<<" exists.\n";  
   }      
   else if(command=="printall"||command=="Printall")
   {
      if(!database.isEmpty())
      database.dump();
      else
      cout<<"Error: database is empty.\n";
   }
   else if(command=="printprobes"||command=="Printprobes")
   {
      int StuNum;
      cin>>StuNum;
      studentRecord* temp_ptr;
      if(database.retrieve(StuNum, temp_ptr))
      database.printProbes();
      else
      cout <<"Error: no record with student number "<<StuNum<<" exists.\n";  
   }      

   else if(command=="deleteall"||command=="Deleteall")
   database.clear();
      
      cin>>command;
   }
   return 0;
}