Problem

Suppose that you are creating a fantasy role-playing game. In this game, we have four diff...

Suppose that you are creating a fantasy role-playing game. In this game, we have four different types of creatures: humans, cyberdemons, balrogs, and elves. To represent one of these creatures, we might define a Creature class as follows:

Here is an implementation of the getSpecies() function:

The getDamage() function outputs and returns the damage this creature can inflict in one round of combat. The rules for calculating the damage are as follows:

■ Every creature inflicts damage that is a random number r, where 0<r <= strength.

■ Demons have a 5% chance of inflicting a demonic attack, which is an additional 50 damage points. Balrogs and Cyberdemons are demons.

■ Elves have a 10% chance to inflict a magical attack that doubles the normal amount of damage.

■ Balrogs are very fast, so they get to attack twice.

An implementation of getDamage() is given here:

One problem with this implementation is that it is unwieldy to add new creatures. Rewrite the class to use inheritance, which will eliminate the need for the variable type. The Creature class should be the base class. The classes Demon, Elf, and Human should be derived from Creature. The classes Cyberdemon and Balrog should be derived from Demon. You will need to rewrite the getSpecies() and getDamage() functions so they are appropriate for each class.

For example, the getDamage() function in each class should only compute the damage appropriate for that object. The total damage is then calculated by combining the results of getDamage() at each level of the inheritance hierarchy. As an example, invoking getDamage() for a Balrog object should invoke getDamage() for the Demon object, which should invoke getDamage() for the Creature object. This will compute the basic damage that all creatures inflict, followed by the random 5% damage that demons inflict, followed by the double damage that balrogs inflict.

Also include mutator and accessor functions for the private variables. Write a main function that contains a driver to test your classes. It should create an object for each type of creature and repeatedly outputs the results of getDamage().

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Solutions For Problems in Chapter 14