Question

Elevator (C++)

Following the diagram shown below, create the class Elevator. An Elevator represents a moveable carriage that lifts passengers between floors. As an elevator operates, its sequence of operations are to open its doors, let off passengers, accept new passengers, handle a floor request, close its doors and move to another floor where this sequence repeats over and over while there are people onboard. A sample driver for this class is shown below. Each elevator request translates into just a single line of output shown below. You should probably make a more thorough driver to test your class better.

Elevator Elevator( ); void openDoors( ); void closeDoors( ); void letOffPassengers( int amount ); void acceptPassengers( int amount ); void requestFloor( int floor ); bool isOnFloor( int floor ); int getFloor( ); int getPassengers( ); int my_Floor; int my_NumberOfPassengers; bool my_DoorsOpen;	Sample Driver Code Elevator e; e.openDoors(); e.acceptPassengers( 5 ); e.requestFloor( 3 ); e.closeDoors(); e.openDoors(); e.letOffPassengers( 1 ); e.acceptPassengers( 2 ); e.requestFloor( 4 ); e.closeDoors(); e.openDoors(); e.letOffPassengers( 3 );
	Sample Driver Output Elevator on Floor 1 with 0 passengers Elevator Door's Open Elevator has 5 passengers Passengers want floor 3 Elevator moving to floor 3 Elevator Door's Open Elevator has 4 passengers Elevator has 6 passengers Passengers want floor 4 Elevator moving to floor 4 Elevator Door's Open Elevator has 3 passengers

Answer 1

Elevator.cpp ------

#include<iostream>

using namespace std;

class Elevator
{
   private:
       int my_Floor;
       int my_NumberOfPassengers;
       bool my_DoorsOpen;
   public:
       Elevator();//constructor
       void openDoors();//this function is used to open the door of the elevator
       void closeDoors();//this function is used to close the door of the elevator
       void letOffPassengers(int);//this function is used to let off passengers form the lift
       void requestFloor(int);//this function is used to go to a floor
       bool isOnFloor(int);//this function checks whether the lift is in specified floor
                    //and if it is in the floor then it returns true else returns false
       int getFloor();//this function returns the current floor number
       int getPassengers();//this function returns total number of passengers currently is in the elevator
       void acceptPassengers(int);//accepts passengers in the elevator
};

void Elevator::requestFloor(int floor)
{
   if(floor<0)
   {
       cout<<"Invalid Floor\n";
       return;
   }
   cout<<"Passengers want floor "<<floor<<endl<<"Elevator moving to floor "<<floor<<endl;
}

void Elevator::letOffPassengers(int amount)
{
   my_NumberOfPassengers-=amount;
   cout<<"Elevator has "<<my_NumberOfPassengers<<" passengers\n";
}

void Elevator::acceptPassengers(int amount)
{
   my_NumberOfPassengers+=amount;
   cout<<"Elevator has "<<my_NumberOfPassengers<<" passengers\n";
}

void Elevator::closeDoors()
{
   my_DoorsOpen=false;
}

void Elevator::openDoors()
{
   cout<<"Elevator Door's Open\n";
   my_DoorsOpen=true;
}

Elevator::Elevator()
{
   cout<<"\nElevator on Floor 1 with 0 passengers\n";
   my_Floor=1;//initally the elevator is in the floor 1
   my_NumberOfPassengers=0;//initially the elevator is empty
   my_DoorsOpen=false;//initiall the door of the elevator is closed
}

int Elevator::getFloor()
{
   return my_Floor;
}

int Elevator::getPassengers()
{
   return my_NumberOfPassengers;
}

bool Elevator::isOnFloor(int floor)
{
   if(floor==my_Floor)
       return true;
   else
       return false;
}

int main()
{
   Elevator e;
   e.openDoors();
   e.acceptPassengers( 5 );
   e.requestFloor( 3 );
   e.closeDoors();
   e.openDoors();
   e.letOffPassengers( 1 );
   e.acceptPassengers( 2 );
   e.requestFloor( 4 );
   e.closeDoors();
   e.openDoors();
   e.letOffPassengers( 3 );
   return 0;
}