asked on

static use doubt

I do not understand why in the code below I can have the statement

*** private Person passenger; without using the static keyword

and in the statement

*** private static Elevator elevatorA; if I delete the static keyword I get a compiler error

I am a bit confused with the use of static .....

using System;

class Elevator
{
      private int currentFloor = 1;
      private int requestedFloor = 0;
      private int totalFloorsTravelled = 0;
      private Person passenger;

      public void LoadPassenger()
      {
            passenger = new Person();
      }

      public void InitiateNewFloorRequest()
      {
            requestedFloor = passenger.NewFloorRequest();
            Console.WriteLine("Departing floor: " + currentFloor + " Travelling to floor: " + requestedFloor);
            totalFloorsTravelled = totalFloorsTravelled + Math.Abs(currentFloor - requestedFloor);
            currentFloor = requestedFloor;
      }

      public void ReportStatistic()
      {
            Console.WriteLine("Total floors travelled: " + totalFloorsTravelled);
      }
}

class Person
{
      private System.Random randomNumberGenerator;

      public Person()
      {
            randomNumberGenerator = new System.Random();
      }

      public int NewFloorRequest()
      {
            return randomNumberGenerator.Next(1,30);
      }
}

class Building
{
      private static Elevator elevatorA;

      public static void Main()
      {
            elevatorA = new Elevator();

            for(int i = 0; i == 5; i ++)
            {
                  elevatorA.InitiateNewFloorRequest();
            }
      }
}

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WinterMuteUK

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WinterMuteUK

Infact to change building easier:

class Building
{
private Elevator elevatorA;

public static void Main(){
Building building = new Building();
building.elevatorA = new Elevator();

for(int i = 0; i == 5; i++)
building.elevatorA.InitiateNewFloorRequest();
}

You don't need the property to access the member variable, nor the default constructor...! D'oh!

Wint

Uday Ethirajulu

Helloo,
we can use only the static Methods/Members with in the Main method. try the following example.

class tmp
{
// it will raise an error because the variable should be static
// static int x = 10;
int x=10;

public static void Main()
{
Console.WriteLine(x);
}
}