//*************************************************************************
//        The Rent A Car Program
//                //*************************************************************************

#include<fstream.h>
#include<conio.h>
#include<ctype.h>
#include<string.h>
#include<stdio.h>
#include<graphics.h>
#include<dos.h>

//*************************************************************************
//class for the car details.
//*************************************************************************
class cars
{public:
char carreg[15];
int carno;
char ac;
int cartype;
char modelname[20];
int rate;
char caravail;
void accept();
void display();
void getrate();
void modicar(int cno);
void delcar(int cno);
};

//*************************************************************************
//function to accept the details of the cars
//*************************************************************************
void cars:: accept()
{cout<<"\nEnter the car number(used for referance):";
cin>>carno;
cout<<"\nEnter the registration number of car:";
gets(carreg);
cout<<"Enter the model name of car:";
gets(modelname);
do
  {cout<<"Specify whether car has air conditioning(y-yes,n-no)";
   cin>>ac;
  }while(tolower(ac)!='y'||tolower(ac)!='n');
cout<<"\nSpecify the car type:";
cout<<"\n1.Small Car.\n2.Luxury Car.\n3.SUV(8 seater)";
do
  {cout<<"\nPlease enter your choice by choosing the option's number";
   cin>>cartype;
  }while(cartype!=1 || cartype!=2 || cartype!=3);
cout<<"\nIs the car available for renting out?";
cout<<"\n(y for yes and n for no)";
do
{cin>>caravail;
  if(tolower(caravail)!='y'|| tolower(caravail)!='n')
  cout<<"Please enter y for yes and n for no";
} while(tolower(caravail)!='y'|| tolower(caravail)!='n');
}

//*************************************************************************
//Function to display the records of the cars.
//*************************************************************************
void cars::display()
{cout<<"----------------------------------------------";
cout<<"\nCar Number              :"<<carno;
cout<<"\nCar Registration Number :"<<carreg;
cout<<"\nCar Model Number        :";
puts(modelname);
cout<<"Air Conditioning Available:";
if(tolower(ac)=='y')
cout<<"Yes";
else
if(tolower(ac)=='n')
cout<<"No";
cout<<"\nCar type                :";

while(cartype!=1 || cartype!=2 || cartype!=3)
{switch(cartype)
  {case 1:cout<<"Small Car";
           break;
   case 2:cout<<"Luxury Car";
           break;
   case 3:cout<<"SUV(8 seater)";
           break;
  }
}
cout<<"----------------------------------------------";
}
//*************************************************************************
//Function to determine the rate of a car.
//*************************************************************************
void cars::getrate()
{switch(ac)
  {case 'y':
   case 'Y':switch(cartype)
         {case 1:rate=350;  break;
          case 2:rate=450;  break;
          case 3:rate=550;  break;
         }
         break;
   case 'n':
   case 'N':switch(cartype)
         {case 1:rate=300;  break;
          case 2:rate=400;  break;
          case 3:rate=500;  break;
         }
         break;
}
}

//*************************************************************************
//Function to modify the details of a car
//*************************************************************************
void cars::modicar(int cno)
{cars c;
int flag=0,rec=0;
fstream fop;
fop.open("cars.dat",ios::binary|ios::in|ios::out);
while(!fop.eof())
{fop.read((char*)& c,sizeof(cars));
  rec++;
  if(cno==c.carno)
   {cout<<"\nThis car's details are as follows:";
    c.display();
    cout<<"\nWould you still like to modify the details";
    char ch;
    cout<<"\ny for yes and n for no";
    if(tolower(ch)=='y')
     {c.accept();
      fop.seekg((rec-1)*sizeof(cars),ios::beg);
      fop.write((char*)& c,sizeof(cars));
      flag=1;
     }
     break;
   }
}
if(flag==0)
  cout<<"No car with such a car number exists!";
else
  cout<<"The record has been modified successfully!";
fop.close();
}

//*************************************************************************
//Function to delete the records of a car
//*************************************************************************
void cars::delcar(int cno)
{cars c;
ifstream fin;
ofstream fout;
int flag=0;
fin.open("cars.dat",ios::binary);
fout.open("Temp.dat",ios::binary);
while(!fin.eof())
{fin.read((char*) &c,sizeof(cars));
  if(c.carno!=cno)
  fout.write((char*) &c,sizeof(cars));
  else flag=1;
}
  if(flag==0)
   cout<<"No such car with that car number!";
  else
   cout<<"The cars details have been successfully deleted";
fin.close();
fout.close();
remove("cars.dat");
rename("Temp.dat","cars.dat");
}

//*************************************************************************
//Class for the customer details.
//*************************************************************************
class customer
{public:
char name[26];
char houseno[11];
char street[21];
char city[11];
long telno;
void put_data();
void get_data();
void modicust(long tel);
void delcust(long tel);
};

//*************************************************************************
//Function to accept the customer details.
//*************************************************************************
void customer::get_data()
{
cout<<"\nEnter the name of the person:";
gets(name);
cout<<"\nEnter the House number:";
gets(houseno);
cout<<"\nEnter the street address:";
gets(street);
cout<<"\nEnter the city:";
gets(city);
cout<<"\nEnter the telephone number";
cin>>telno;
}

//*************************************************************************
//Function to display the details of the customers.
//*************************************************************************
void customer::put_data()
{
cout<<"\nName     : ";gets(name);
cout<<"\nHouse.No.: ";gets(houseno);
cout<<"\nStreet   : ";gets(street);
cout<<"\nCity     : ";gets(city);
cout<<"\nTelephone: "<<telno;
}

//*************************************************************************
//Function to modify the records of a customer
//*************************************************************************
void customer::modicust(long tel)
{customer c;
int flag=0,rec=0;
fstream fop;
fop.open("customer.dat",ios::binary);
while(!fop.eof())
  {fop.read((char*)& c,sizeof(customer));
   rec++;
   if(c.telno==tel)
    {cout<<"\nThe details of this customer are:";
     c.put_data();
     cout<<"\nDo you still want to modify the customer's record?";
     cout<<"\ny for yes and n for no";
     char ch;
     cin>>ch;
     if(tolower(ch)=='y')
      {c.get_data();
       fop.seekg((rec-1)*sizeof(customer),ios::beg);
       fop.write((char*)& c,sizeof(customer));
       flag=1;
       break;
      }
    }
  }
  if(flag==0)
   cout<<"\nSuch a customer does not exist!";
  else
   cout<<"\The customer's record has been successfully  modified!";
  fop.close();
}

//*************************************************************************
//Function to delete the records of a customer
//*************************************************************************
void customer::delcust(long tel)
{customer c;
ifstream fin;
ofstream fout;
int flag=0;
fin.open("customer.dat",ios::binary);
fout.open("Temp.dat",ios::binary);
while(!fin.eof())
{fin.read((char*) &c,sizeof(customer));
  if(c.telno!=tel)
  fout.write((char*) &c,sizeof(customer));
  else flag=1;
}
  if(flag==0)
   cout<<"No customer with that telephone number exists!";
  else
   cout<<"The customer details have been successfully deleted";
fin.close();
fout.close();
remove("customer.dat");
rename("Temp.dat","customer.dat");
}

//*************************************************************************
//Class for the details of the rental.
//*************************************************************************
class rent:public cars,public customer
{public:
char name[26],model[20];
long tele;
int days;
int carnum;
void disptrans();
void transac(long tel);
void deltrans(long tel);
void moditrans(long tel);
void canceltrans(long tel);
};

//*************************************************************************
//Function to display the records of a transaction
//*************************************************************************
void rent::disptrans()
{cout<<"---------------------------------------------";
cout<<"Customer Name:";puts(name);
cout<<"Car Model:";puts(model);
cout<<"Rent Period:"<<days;
cout<<"---------------------------------------------";
}

//*************************************************************************
//Function to create a new transaction
//*************************************************************************
void rent::transac(long tel)
{fstream fin;
ofstream fout;
customer c;
cars ca;
int choi,num;
rent r;
fin.open("customer.dat",ios::binary);
while(!fin.eof())
  {fin.read((char*)&c ,sizeof(customer));
   if(c.telno==tel)
    {r.tele=c.telno;
     strcpy(r.name,c.name);
    }
  }
fin.close();
fin.open("cars.dat",ios::binary);
cout<<"\nChoose type of car:";
cout<<"\n1.Small Car\n2.Luxury Car\n3.SUV(8 seater)";
cout<<"\nChoose the option by giving the option number.";
cin>>choi;
cout<<"The available cars are:";
while(!fin.eof())
  {fin.read((char*)& ca,sizeof(cars));
   if(choi==ca.cartype)
    {if(tolower(ca.caravail)=='y')
     cout<<"Car Number:"<<ca.carno;
     cout<<"Model:";
     puts(ca.modelname);
     cout<<"------------------------------------";
    }
  }
cout<<"Please choose the car you would like by giving the car number.";
cin>>num;
while(!fin.eof())
  {fin.read((char*)& ca,sizeof(cars));
   if(ca.carno==num)
    {r.carnum==ca.carno;
     strcpy(r.model,ca.modelname);
     break;
    }
    else
     cout<<"no such car";
   }
  cout<<"\nPlease enter the period for rent out(max.7 days)";
do
{cin>>num;
  if(num>7)
  cout<<"Sorry!The max rental period is 7";
}while(num>7);
r.days=num;
fout.open("Rent.dat",ios::binary|ios::app);
fout.write((char*) &r,sizeof(rent));
fin.close();
fout.close();
}

//*************************************************************************
//Function to delete a particular transaction
//*************************************************************************
void rent::deltrans(long tel)
{rent r;
ifstream fin;
ofstream fout1;
ofstream fout2;
int flag=0;
fin.open("Rent.dat",ios::binary);
fout1.open("Temp.dat",ios::binary);
fout2.open("Rentlog.dat",ios::binary|ios::app);
while(!fin.eof())
{fin.read((char*) &r,sizeof(rent));
  if(r.tele!=tel)
  fout1.write((char*) &r,sizeof(rent));
  else if(r.tele==tel)
  fout2.write((char*) &r,sizeof(rent));
  else flag=1;
}
  if(flag==0)
   cout<<"Telephone number does not exist!";
  else
   cout<<"The transaction has been successfully deleted";
fin.close();
fout1.close();
fout2.close();
remove("Rent.dat");
rename("Temp.dat","Rent.dat");
}

//*************************************************************************
//Function to cancel a transaction
//*************************************************************************
void rent::canceltrans(long tel)
{rent r;
ifstream fin;
ofstream fout;
int flag=0;
fin.open("Rent.dat",ios::binary);
fout.open("Temp.dat",ios::binary);
while(!fin.eof())
{fin.read((char*) &r,sizeof(rent));
  if(r.tele!=tel)
  fout.write((char*) &r,sizeof(rent));
  else flag=1;
}
  if(flag==0)
   cout<<"No customer with that telephone number has rented a car!";
  else
   cout<<"The transaction has been successfully deleted";
fin.close();
fout.close();
remove("Rent.dat");
rename("Temp.dat","Rent.dat");
}

//*************************************************************************
//Function to modify a transaction
//*************************************************************************
void rent::moditrans(long tel)
{rent r;
int flag=0,rec=0;
fstream fop;
fop.open("Rent.dat",ios::binary|ios::in|ios::out);
while(!fop.eof())
  {fop.read((char*) &r,sizeof(rent));
   rec++;
   if(tel==r.tele)
    {cout<<"\nThe transaction details are as follows:";
     r.disptrans();
     cout<<"\nDo you still wish to modify the transaction?";
     char ch;
     cout<<"\n(y for yes n for no)";
     cin>>ch;
     if(tolower(ch)=='y')
      {r.transac(tel);
       fop.seekg((rec-1)*sizeof(rent),ios::beg);
       fop.write((char*)& r,sizeof(rent));
       flag=1;
       break;
      }
   if(flag==0)
   cout<<"No customer with that telephone number has rented a car!";
   else
   cout<<"The transaction has been successfully been modified!";
   fop.close();
  }
}

//*************************************************************************
//Function to calculate the total rent of the transaction
//*************************************************************************
void calc(long tel)
{cars c;
rent r;
int cno,rate,days;
ifstream fin1;
ifstream fin2;
fin1.open("cars.dat",ios::binary);
fin2.open("rent.dat",ios::binary);
while(!fin2.eof())
  {fin2.read((char*)& r,sizeof(rent));
   if(r.tele==tel)
   {cno=r.carnum;
    days=r.days;
   }
  }
while(!fin1.eof())
  {fin1.read((char*)& c,sizeof(cars));
   if(cno==c.carno)
    rate=c.rate;
  }
total=days*rate;
cout<<"\nThe Payment Details:";
cout<<"\nNo of Days:"<<days;
cout<<"\nRate:Rs."<<rate;
cout<<"\nTotal:Rs."<<total;
}

//*************************************************************************
//Function Display the scrolling text marquee.
//*************************************************************************
void marquee()
{
int gd=DETECT,gm;
int i;
initgraph(&gd,&gm,"");
settextstyle(1,0,5);
settextjustify(1,1);
for(i=0;i<getmaxx();i++)
{
setcolor(YELLOW);
outtextxy(getmaxx()-i,getmaxy()/2,"Geo Car Rental");
delay(10);
setcolor(getbkcolor());
outtextxy(getmaxx()-i,getmaxy()/2,"Geo Car Rental");
}
}

//*************************************************************************
//The Main function
//*************************************************************************
void main()
{clrscr();
customer cust;
cars car;
rent rental;
ofstream fout;
ifstream fin;
char choi;
marquee();
do{
gotoxy(28, 9);
cprintf("Car Rental Menu");
cout<<"\n(a).New Car";
cout<<"\n(B).New Customer";
cout<<"\n©.New Transaction";
cout<<"\n(d).Modify Car Details";
cout<<"\n(e).Modify Customer Details";
cout<<"\n(f).Modify Transaction Details";
cout<<"\n(g).Delete Car Details";
cout<<"\n(h).Delete Customer Details";
cout<<"\n(i).Delete Transaction";
cout<<"\n(j).Cancel Transaction";
cout<<"\n(k).View Customer History";
cout<<"\n(l).View Payment Details";
cout<<"\n(m).Exit";
char ch;
switch(ch)
  {case 'a':
   case 'A':cout<<"New Car";
        car.accept();
        fout.open("cars.dat",ios::binary|ios::app);
        fout.write((char*)& car,sizeof(cars));
        cout<<"The Car Details have been added successfully!";
        fout.close();
        break;
   case 'b':
   case 'B':cout<<"New Customer";
        cust.get_data();
        fout.open("customer.dat",ios::binary|ios::app);
        fout.write((char*)&cust,sizeof(customer));
        cout<<"The Customer Details have been added successfully!";
        fout.close();
        break;
   case 'c':
   case 'C':cout<<"New Transaction";
        cout<<"Please Enter the customer's telephone number";
        long tel;
        cin>>tel;
        fin.open("customer.dat",ios::binary|ios::app);
        fin.read((char*)& cust,sizeof(customer));
        if(cust.telno==tel)
         rental.transac(tel);
        else
        {cout<<"\nNo customer has this phone number in our database";
         cout<<"\nWould you like to add this customer to our data base?";
         cout<<"\n(y for yes and n for no)";
         char c;
         cin>>c;
         if(tolower©=='y')
          {cust.accept();
           fout.open("customer.dat",ios::binary|ios:app);
           fout.write((char*)& cust,sizeof(customer));
           cout<<"\nCustomer has been added";
           fout.close();
           cout<<"\nYou may proceed with the transaction details";
           rental.transac(tel);
          }
         else break;
        }
        break;
   case 'd':
   case 'D':cout<<"\nModify Car Details";
        int cno;
        cout<<"\nPlease Enter the car number";
        cin>>cno;
        car.modicar(cno);
        break;
   case 'e':
   case 'E':cout<<"\nModify Customer Details";
        long tel;
        cout<<"\nPlease Enter the customer's telephone number";
        cin>>tel;
        cust.modicust(tel);
        break;
   case 'f':
   case 'F':cout<<"\nModify Transaction Details";
        long tel;
        cout<<"\nPlease enter the customer's telephone number";
        cin>>tel;
        rental.moditrans(tel);
        break;
   case 'g':
   case 'G':cout<<"\nDelete Car Details";
        int cno;
        cout<<"\nPlease enter the car number";
        cin>>cno;
        car.delcar(cno);
        break;
   case 'h':
   case 'H':cout<<"\nDelete Customer Details";
        long tel;
        cout<<"Please enter the car number";
        cin>>tel;
        cust.delcust(tel);
        break;
   case 'i':
   case 'I':cout<<"\nDelete Transaction";
        cout<<"\nWarning:This option is to delete the transaction ";
        cout<<"only once the rental is over";
        cout<<"\nTo cancel a transaction please use option (j).";
        cout<<"\nDo you still want to proceed?(yes or no)";
        char ch;
        cin>>ch;
        if(tolower(ch)=='y')
         {cout<<"\nPlease enter the customer's telephone number";
          long tel;
          cin>>tel;
          rental.deltrans(tel);
          cout<<"\nThe transaction has been moved to rent history log";
          break;
         }
        else if(tolower(ch)=='n')
         {cout<<"\nPlease run option (j). to cancel transaction";
          break;
         }
        else
         {cout<<"Sorry,Wrong Choice!";
          break;
         }
        break;
   case 'j':
   case 'J':cout<<"Cancel Transaction";
        cout<<"\nPlease enter the customer's telephone number";
        long tel;
        cin>>tel;
        rental.canceltrans(tel);
        break;
   case 'k':
   case 'K':cout<<"\nView Cutomer History";
        int flag=0;
        long tel;
        ifstream fin;
        fin.open("rentlog.dat",ios::binary);
        while(!fin.eof)
         {fin.read((char*)& rental,sizeof(rent));
          if(rental.tele==tel)
          flag++;
         }
        if(flag!=0)
         {while(!fin.eof)
          {fin.read((char*)& rental,sizeof(rent));
           if(rental.tele==tel)
        {cout<<"\n";
         rental.disptrans();
        }
          }
         }
        if(flag==0)
        cout<<"\nSorry!The customer has never rented a car before";
        fin.close();
   case 'l':
   case 'L':cout<<"View Payment Details";
        cout<<"\nPlease Enter customer's telephone number";
        long tel;
        cin>>tel;
        calc(tel);
        break;
   case 'm':
   case 'M':cout<<"\nThank You,for using the rent-a-car program";
        cout<<"\nPress any key to exit";
        getch();
        exit(0);
        break;
   default:cout<<"\nError! Wrong Choice inputted.";
  }
cout<<"Would you like to continue using the rent-a-car menu";
cout<<"y for yes and n for no";
cin>>choi;
if(tolower(choi)=='n')
  cout<<"Thank You,for using the rent-a-car program";
}while(tolower(choi)=='y');
}
}

void calc(long tel)

         if(tolower©=='y')

         if(tolower©=='y')

565 C:\car2.cpp stray '\169' in program

     if(tolower┌=='y')

Error CAR2.CPP 565: Illegal character '┌' (0xa9)

//*************************************************************************
// The Rent A Car Program
// //*************************************************************************

#include<fstream.h>
#include<conio.h>
#include<ctype.h>
#include<string.h>
#include<stdio.h>
#include<graphics.h>
#include<dos.h>

//*************************************************************************
//class for the car details.
//*************************************************************************
class cars
{public:
char carreg[15];
int carno;
char ac;
int cartype;
char modelname[20];
int rate;
char caravail;
void accept();
void display();
void getrate();
void modicar(int cno);
void delcar(int cno);
};

//*************************************************************************
//function to accept the details of the cars
//*************************************************************************
void cars:: accept()
{clrscr();
cout<<"\nEnter the car number(used for referance):";
cin>>carno;
cout<<"\nEnter the registration number of car:";
gets(carreg);
cout<<"Enter the model name of car:";
gets(modelname);
do
{cout<<"Specify whether car has air conditioning(y-yes,n-no)";
cin>>ac;
}while((tolower(ac)!='y')&&(tolower(ac)!='n'));
cout<<"\nSpecify the car type:";
cout<<"\n1.Small Car.\n2.Luxury Car.\n3.SUV(8 seater)";
do
{cout<<"\nPlease enter your choice by choosing the option's number";
cin>>cartype;
}while(cartype!=1 && cartype!=2 && cartype!=3);
cout<<"\nIs the car available for renting out?";
cout<<"\n(y for yes and n for no)";
do
{cin>>caravail;
if(tolower(caravail)!='y'&& tolower(caravail)!='n')
cout<<"Please enter y for yes and n for no";
} while(tolower(caravail)!='y'&& tolower(caravail)!='n');
}

//*************************************************************************
//Function to display the records of the cars.
//*************************************************************************
void cars::display()
{clrscr();
cout<<"----------------------------------------------";
cout<<"\nCar Number :"<<carno;
cout<<"\nCar Registration Number :"<<carreg;
cout<<"\nCar Model Number :";
puts(modelname);
cout<<"Air Conditioning Available:";
if(tolower(ac)=='y')
cout<<"Yes";
else
if(tolower(ac)=='n')
cout<<"No";
cout<<"\nCar type :";

while(cartype!=1 && cartype!=2 && cartype!=3)
{switch(cartype)
{case 1:cout<<"Small Car";
break;
case 2:cout<<"Luxury Car";
break;
case 3:cout<<"SUV(8 seater)";
break;
}
}
cout<<"----------------------------------------------";
}
//*************************************************************************
//Function to determine the rate of a car.
//*************************************************************************
void cars::getrate()
{clrscr();
switch(ac)
{case 'y':
case 'Y':switch(cartype)
{case 1:rate=350; break;
case 2:rate=450; break;
case 3:rate=550; break;
}
break;
case 'n':
case 'N':switch(cartype)
{case 1:rate=300; break;
case 2:rate=400; break;
case 3:rate=500; break;
}
break;
}
}

//*************************************************************************
//Function to modify the details of a car
//*************************************************************************
void cars::modicar(int cno)
{clrscr();
cars c;
int flag=0,rec=0;
fstream fop;
fop.open("cars.dat",ios::binary|ios::in|ios::out);
while(!fop.eof())
{fop.read((char*)& c,sizeof(cars));
rec++;
if(cno==c.carno)
{cout<<"\nThis car's details are as follows:";
c.display();
cout<<"\nWould you still like to modify the details";
char ch;
cout<<"\ny for yes and n for no";
if(tolower(ch)=='y')
{c.accept();
fop.seekg((rec-1)*sizeof(cars),ios::beg);
fop.write((char*)& c,sizeof(cars));
flag=1;
}
break;
}
}
if(flag==0)
cout<<"No car with such a car number exists!";
else
cout<<"The record has been modified successfully!";
fop.close();
}

//*************************************************************************
//Function to delete the records of a car
//*************************************************************************
void cars::delcar(int cno)
{clrscr();
cars c;
ifstream fin;
ofstream fout;
int flag=0;
fin.open("cars.dat",ios::binary);
fout.open("Temp.dat",ios::binary);
while(!fin.eof())
{fin.read((char*) &c,sizeof(cars));
if(c.carno!=cno)
fout.write((char*) &c,sizeof(cars));
else flag=1;
}
if(flag==0)
cout<<"No such car with that car number!";
else
cout<<"The cars details have been successfully deleted";
fin.close();
fout.close();
remove("cars.dat");
rename("Temp.dat","cars.dat");
}

//*************************************************************************
//Class for the customer details.
//*************************************************************************
class customer
{public:
char name[26];
char houseno[11];
char street[21];
char city[11];
long telno;
void put_data();
void get_data();
void modicust(long tel);
void delcust(long tel);
};

//*************************************************************************
//Function to accept the customer details.
//*************************************************************************
void customer::get_data()
{clrscr();
cout<<"\nEnter the name of the person:";
gets(name);
cout<<"\nEnter the House number:";
gets(houseno);
cout<<"\nEnter the street address:";
gets(street);
cout<<"\nEnter the city:";
gets(city);
cout<<"\nEnter the telephone number";
cin>>telno;
}

//*************************************************************************
//Function to display the details of the customers.
//*************************************************************************
void customer::put_data()
{ clrscr();
cout<<"\nName : ";gets(name);
cout<<"\nHouse.No.: ";gets(houseno);
cout<<"\nStreet : ";gets(street);
cout<<"\nCity : ";gets(city);
cout<<"\nTelephone: "<<telno;
}

//*************************************************************************
//Function to modify the records of a customer
//*************************************************************************
void customer::modicust(long tel)
{clrscr();
customer c;
int flag=0,rec=0;
fstream fop;
fop.open("customer.dat",ios::binary);
while(!fop.eof())
{fop.read((char*)& c,sizeof(customer));
rec++;
if(c.telno==tel)
{cout<<"\nThe details of this customer are:";
c.put_data();
cout<<"\nDo you still want to modify the customer's record?";
cout<<"\ny for yes and n for no";
char ch;
cin>>ch;
if(tolower(ch)=='y')
{c.get_data();
fop.seekg((rec-1)*sizeof(customer),ios::beg);
fop.write((char*)& c,sizeof(customer));
flag=1;
break;
}
}
}
if(flag==0)
cout<<"\nSuch a customer does not exist!";
else
cout<<"\The customer's record has been successfully modified!";
fop.close();
}

//*************************************************************************
//Function to delete the records of a customer
//*************************************************************************
void customer::delcust(long tel)
{clrscr();
customer c;
ifstream fin;
ofstream fout;
int flag=0;
fin.open("customer.dat",ios::binary);
fout.open("Temp.dat",ios::binary);
while(!fin.eof())
{fin.read((char*) &c,sizeof(customer));
if(c.telno!=tel)
fout.write((char*) &c,sizeof(customer));
else flag=1;
}
if(flag==0)
cout<<"No customer with that telephone number exists!";
else
cout<<"The customer details have been successfully deleted";
fin.close();
fout.close();
remove("customer.dat");
rename("Temp.dat","customer.dat");
}

//*************************************************************************
//Class for the details of the rental.
//*************************************************************************
class rent:public cars,public customer
{public:
char name[26],model[20];
long tele;
int days;
int carnum;
void disptrans();
void transac(long tel);
void deltrans(long tel);
void moditrans(long tel);
void canceltrans(long tel);
};
void calc(long tel);
//*************************************************************************
//Function to display the records of a transaction
//*************************************************************************
void rent::disptrans()
{clrscr();
cout<<"---------------------------------------------";
cout<<"Customer Name:";puts(name);
cout<<"Car Model:";puts(model);
cout<<"Rent Period:"<<days;
cout<<"---------------------------------------------";
}

//*************************************************************************
//Function to create a new transaction
//*************************************************************************
void rent::transac(long tel)
{clrscr();
fstream fin;
ofstream fout;
customer c;
cars ca;
int choi,num;
rent r;
fin.open("customer.dat",ios::binary);
while(!fin.eof())
{fin.read((char*)&c ,sizeof(customer));
if(c.telno==tel)
{r.tele=c.telno;
strcpy(r.name,c.name);
}
}
fin.close();
fin.open("cars.dat",ios::binary);
cout<<"\nChoose type of car:";
cout<<"\n1.Small Car\n2.Luxury Car\n3.SUV(8 seater)";
cout<<"\nChoose the option by giving the option number.";
cin>>choi;
cout<<"The available cars are:";
while(!fin.eof())
{fin.read((char*)& ca,sizeof(cars));
if(choi==ca.cartype)
{if(tolower(ca.caravail)=='y')
cout<<"Car Number:"<<ca.carno;
cout<<"Model:";
puts(ca.modelname);
cout<<"------------------------------------";
}
}
cout<<"Please choose the car you would like by giving the car number.";
cin>>num;
while(!fin.eof())
{fin.read((char*)& ca,sizeof(cars));
if(ca.carno==num)
{r.carnum=ca.carno;
strcpy(r.model,ca.modelname);
break;
}
else
cout<<"no such car";
}
cout<<"\nPlease enter the period for rent out(max.7 days)";
do
{cin>>num;
if(num>7)
cout<<"Sorry!The max rental period is 7";
}while(num>7);
r.days=num;
fout.open("Rent.dat",ios::binary|ios::app);
fout.write((char*) &r,sizeof(rent));
fin.close();
fout.close();
}

//*************************************************************************
//Function to delete a particular transaction
//*************************************************************************
void rent::deltrans(long tel)
{clrscr();
rent r;
ifstream fin;
ofstream fout1;
ofstream fout2;
int flag=0;
fin.open("Rent.dat",ios::binary);
fout1.open("Temp.dat",ios::binary);
fout2.open("Rentlog.dat",ios::binary|ios::app);
while(!fin.eof())
{fin.read((char*) &r,sizeof(rent));
if(r.tele!=tel)
fout1.write((char*) &r,sizeof(rent));
else if(r.tele==tel)
fout2.write((char*) &r,sizeof(rent));
else flag=1;
}
if(flag==0)
cout<<"Telephone number does not exist!";
else
cout<<"The transaction has been successfully deleted";
fin.close();
fout1.close();
fout2.close();
remove("Rent.dat");
rename("Temp.dat","Rent.dat");
}

//*************************************************************************
//Function to cancel a transaction
//*************************************************************************
void rent::canceltrans(long tel)
{clrscr();
rent r;
ifstream fin;
ofstream fout;
int flag=0;
fin.open("Rent.dat",ios::binary);
fout.open("Temp.dat",ios::binary);
while(!fin.eof())
{fin.read((char*) &r,sizeof(rent));
if(r.tele!=tel)
fout.write((char*) &r,sizeof(rent));
else flag=1;
}
if(flag==0)
cout<<"No customer with that telephone number has rented a car!";
else
cout<<"The transaction has been successfully deleted";
fin.close();
fout.close();
remove("Rent.dat");
rename("Temp.dat","Rent.dat");
}

//*************************************************************************
//Function to modify a transaction
//*************************************************************************
void rent::moditrans(long tel)
{ clrscr();
  rent r;
  int flag=0,rec=0;
  fstream fop;
  fop.open("Rent.dat",ios::binary|ios::in|ios::out);
  while(!fop.eof())
  { fop.read((char*) &r,sizeof(rent));
    rec++;
    if(tel==r.tele)
    { cout<<"\nThe transaction details are as follows:";
      r.disptrans();
      cout<<"\nDo you still wish to modify the transaction?";
      char ch;
      cout<<"\n(y for yes n for no)";
      cin>>ch;
      if(tolower(ch)=='y')
       {  r.transac(tel);
      fop.seekg((rec-1)*sizeof(rent),ios::beg);
      fop.write((char*)& r,sizeof(rent));
      flag=1;
      break;
    }
      if(flag==0)
    cout<<"No customer with that telephone number has rented a car!";
      else
    cout<<"The transaction has been successfully been modified!";
    }
  }
     fop.close();

}

//*************************************************************************
//Function to calculate the total rent of the transaction
//*************************************************************************
void calc(long tel)
{
cars c;
rent r;
int cno,rate,days;
ifstream fin1;
ifstream fin2;
fin1.open("cars.dat",ios::binary);
fin2.open("rent.dat",ios::binary);
while(!fin2.eof())
{fin2.read((char*)& r,sizeof(rent));
if(r.tele==tel)
{cno=r.carnum;
days=r.days;
}
}
while(!fin1.eof())
{fin1.read((char*)& c,sizeof(cars));
if(cno==c.carno)
rate=c.rate;
}
int total=days*rate;
cout<<"\nThe Payment Details:";
cout<<"\nNo of Days:"<<days;
cout<<"\nRate:Rs."<<rate;
cout<<"\nTotal:Rs."<<total;
}

//*************************************************************************
//Function Display the scrolling text marquee.
//*************************************************************************
void marquee()
{
int gd=DETECT,gm;
int i;
initgraph(&gd,&gm,"");
settextstyle(1,0,5);
settextjustify(1,1);
for(i=0;i<getmaxx();i++)
{
setcolor(YELLOW);
outtextxy(getmaxx()-i,getmaxy()/2,"Geo Car Rental");
delay(10);
setcolor(getbkcolor());
outtextxy(getmaxx()-i,getmaxy()/2,"Geo Car Rental");
}
closegraph();
}

//*************************************************************************//
//The Main function
//*************************************************************************//
void main()
{ clrscr();
  customer cust;
  cars car;
  rent rental;
  ofstream fout;
  ifstream fin;
  char choi;
  marquee();
  do
   {  clrscr();
     gotoxy(28,9);
     cprintf("Car Rental Menu");
     cout<<"\n(a).New Car";
     cout<<"\n(b).New Customer";
     cout<<"\n(c).New Transaction";
     cout<<"\n(d).Modify Car Details";
     cout<<"\n(e).Modify Customer Details";
     cout<<"\n(f).Modify Transaction Details";
     cout<<"\n(g).Delete Car Details";
     cout<<"\n(h).Delete Customer Details";
     cout<<"\n(i).Delete Transaction";
     cout<<"\n(j).Cancel Transaction";
     cout<<"\n(k).View Customer History";
     cout<<"\n(l).View Payment Details";
     cout<<"\n(m).Exit";
     char ch1,ch;
     ch1=getche();
     ch=toupper(ch1);
     switch(ch)
      {   case 'A': cout<<"New Car";
            car.accept();
            fout.open("cars.dat",ios::binary|ios::app);
            fout.write((char*)& car,sizeof(cars));
            cout<<"The Car Details have been added successfully!";
            fout.close();
            break;
      case 'B': cout<<"New Customer";
            cust.get_data();
            fout.open("customer.dat",ios::binary|ios::app);
            fout.write((char*)&cust,sizeof(customer));
            cout<<"The Customer Details have been added successfully!";
            fout.close();
            break;
      case 'C': cout<<"New Transaction";
            cout<<"Please Enter the customer's telephone number";
            long tel;
            cin>>tel;
            fin.open("customer.dat",ios::binary|ios::app);
            fin.read((char*)& cust,sizeof(customer));
            if(cust.telno==tel)
              rental.transac(tel);
            else
              {
             cout<<"\nNo customer has this phone number in our database";
             cout<<"\nWould you like to add this customer to our data base?";
             cout<<"\n(y for yes and n for no)";
             char c;
             cin>>c;
             if(tolower(c)=='y')
                 {
                cust.get_data();
                fout.open("customer.dat",ios::binary|ios::app);
                fout.write((char*)& cust,sizeof(customer));
                cout<<"\nCustomer has been added";
                fout.close();
                cout<<"\nYou may proceed with the transaction details";
                rental.transac(tel);
                 }
               }
            break;
      case 'D': cout<<"\nModify Car Details";
            int cno;
            cout<<"\nPlease Enter the car number";
            cin>>cno;
            car.modicar(cno);
            break;
      case 'E': cout<<"\nModify Customer Details";
            long tel1;
            cout<<"\nPlease Enter the customer's telephone number";
            cin>>tel1;
            cust.modicust(tel1);
            break;
      case 'F': cout<<"\nModify Transaction Details";
            long tel2;
            cout<<"\nPlease enter the customer's telephone number";
            cin>>tel2;
            rental.moditrans(tel2);
            break;
      case 'G': cout<<"\nDelete Car Details";
            int cno1;
            cout<<"\nPlease enter the car number";
            cin>>cno1;
            car.delcar(cno1);
            break;
      case 'H': cout<<"\nDelete Customer Details";
            long tel3;
            cout<<"Please enter the car number";
            cin>>tel3;
            cust.delcust(tel3);
            break;
      case 'I': cout<<"\nDelete Transaction";
            cout<<"\nWarning:This option is to delete the transaction ";
            cout<<"only once the rental is over";
            cout<<"\nTo cancel a transaction please use option (j).";
            cout<<"\nDo you still want to proceed?(yes or no)";
            char ch;
            cin>>ch;
            if(tolower(ch)=='y')
             {
            cout<<"\nPlease enter the customer's telephone number";
            long tel;
            cin>>tel;
            rental.deltrans(tel);
            cout<<"\nThe transaction has been moved to rent history log";
            break;
             }
            else
              if(tolower(ch)=='n')
            {
                cout<<"\nPlease run option (j). to cancel transaction";
                break;
            }
              else
             {
                  cout<<"Sorry,Wrong Choice!";
                  break;
             }
      case 'J': cout<<"Cancel Transaction";
            cout<<"\nPlease enter the customer's telephone number";
            long tel4;
            cin>>tel4;
            rental.canceltrans(tel4);
            break;
  &