session_6_ex

 

required files

• weapon.cpp
• weapon.hpp
• vehicle.cpp
• vehicle.hpp
• soldier.cpp
• soldier.hpp
• gun.cpp
• gun.hpp
• riffle.cpp
• riffle.hpp
• shotgun.cpp
• shotgun.hpp
• jeep.cpp
• jeep.hpp
• blackbird.cpp
• blackbird.hpp
• sniper.cpp
• sniper.hpp
• infantry.cpp
• infantry.hpp
• captain_america.cpp
• captain_america.hpp

The C++ army

For this exercise, we will have to build a code that relies a lot on polymorphism and inheritance.

Just image you are developing a video game where you can reuse code as much as possible and the behavior is really predictable.

We will have to build different units for our army which will be divided into different categories as follow:

• Weapon
• Vehicle
• Soldier

You will use those categories as class names

// Example
class Weapon {};

class Vehicle {};

class Soldier {};

Weapon

methods

• public virtual int Weapon::countAmmunition() = 0 which will return the number of ammunition available
• public virtual void Weapon::fire() = 0 will print BANG with my <weapon_name>\n and reduce the number of ammunition by -1. If ammunition is equal to 0 then display \n only.
• public virtual string Weapon::model() = 0 which will return the name of your weapon

attributes

None

Vehicle

methods

• public int Vehicle::countSoldier() returns the number of soldier in the vehicle.
• public virtual void Vehicle::action() = 0
• public void Vehicle::addSoldier(Soldier *) add a soldier to our vehicule.
• public std::vector<Soldier*> Vehicle::unload() will return a vector of soldiers and set the number of soldiers back to 0

attributes

• private std::vector<Soldier*>

Soldier

methods

• Soldier::Soldier(string name, string rank)
• public void Soldier::scream() will print AAAAHHH\n
• public virtual void Soldier::identification() will print <rank> <solider_name> Sir!\n
• public virtual void Soldier::fireLeft() will Weapon::fire() left weapon. If no weapon is set, then do nothing.
• public virtual void Soldier::fireRight() will Weapon::fire() right weapon. If no weapon is set, then do nothing.
• public virtual void Soldier::setRight(Weapon *)
• public virtual void Soldier::setLeft(Weapon *)

attributes

• private Weapon* left
• private Weapon* right
• private string name
• private string rank

Since the described classes all have at least one pure virtual method, we can't instantiate them directly without have a g++ error.

Gun

The Gun class will inherit from a Weapon class, it will have at least

• protected int ammunition
• protected string name
• public Gun(string name, int ammo)

Riffle

The Riffle class will inherit from a Gun. The constructor will have to be like Riffle::Riffle() and set the name to riffle and the ammo count to 10 automatically.

This class will only contain a constructor

ShotGun

The ShotGun class will inherit from a Gun. The constructor will have to be like ShotGun::ShotGun() and set the name to shot_gun and the ammo count to 5 automatically.

This class will only contain a constructor

Jeep

The Jeep class will inherit from a Vehicle. The constructor will have to be Jeep::Jeep().

We will have to implement the method action() which will print Fast and Furious sucks\n

BlackBird

The BlackBird class will inherit from a Vehicle. The constructor will have to be like BlackBird::BlackBird().

We will have to implement the method action() which will print On my way guys! OVER\n

Sniper

The Sniper class will inherit from a Soldier. The constructor will have to be Sniper::Sniper(string name). The default rank will be sniper.

Infantry

The Infantry class will inherit from a Soldier. The constructor will have to be Infantry::Infantry(string name). The default rank will be sergeant.

CaptainAmerica

The CaptainAmerica class will inherit from a Soldier. The constructor will have to be CaptainAmerica::CaptainAmerica().

identification() will print I am Captain America but I wish I was Batman.\n

setLeft(Weapon *) and setRight(Weapon *) will only print I don't need it, I have my vibranium shield.

fireLeft() and fireRight() will only print PLEASE HELP ME SpiderMan!!!\n even he has weapons attached to his hands or not.