Class Stadium maintains a list of non$-$player characters and processes any attacks. Initially, the

list $\_$npcs is empty. Non$-$player characters can be added by using the Add method of class

Stadium.

When you tell an object of class Stadium to Attack, one of two things will happen:

$$ If the list of non$-$player characters is not empty, then

o The message $$Bring it on$!$ is sent to the console.

o The first character in the list is told to GetHit using the specified amount of dam$-$

age.

$$ Else

o The message $$Not very effective...$$ is sent to the console.

When you tell an object of class Stadium to AttackAll, one of two things will happen:

$$ If the list of non$-$player characters is not empty, then

o The message $$Charge$!$ is sent to the console.

o Every character in $\_$npcs is told to GetHit using the specified amount of damage.

$$ Else

o The message $$Why$?$ is sent to the console.

The abstract class Character defines the common features of non$-$player characters. There are

two classes of non$-$player characters: Mortal and Immortal