Animal

The Code

 1   class Animal
 2   {
 3     protected double NaturalLifespan;
 4     protected int ID;
 5     protected static int NextID = 1;
 6     protected int Age = 0;
 7     protected double ProbabilityOfDeathOtherCauses;
 8     protected bool IsAlive;
 9     protected static Random Rnd = new Random();
10 
11     public Animal(int AvgLifespan, double AvgProbabilityOfDeathOtherCauses, int Variability)
12     {
13       NaturalLifespan = AvgLifespan * CalculateRandomValue(100, Variability) / 100;
14       ProbabilityOfDeathOtherCauses = AvgProbabilityOfDeathOtherCauses * CalculateRandomValue(100, Variability) / 100;
15       IsAlive = true;
16       ID = NextID;
17       NextID++;
18     }
19 
20     public virtual void CalculateNewAge()
21     {
22       Age++;
23       if (Age >= NaturalLifespan)
24       {
25         IsAlive = false;
26       }
27     }
28 
29     public virtual bool CheckIfDead()
30     {
31       return !IsAlive;
32     }
33 
34     public virtual void Inspect()
35     {
36       Console.Write("  ID " + ID + " ");
37       Console.Write("Age " + Age + " ");
38       Console.Write("LS " + NaturalLifespan + " ");
39       Console.Write("Pr dth " + Math.Round(ProbabilityOfDeathOtherCauses, 2) + " ");
40     }
41 
42     public virtual bool CheckIfKilledByOtherFactor()
43     {
44       if (Rnd.Next(0, 100) < ProbabilityOfDeathOtherCauses * 100)
45       {
46         IsAlive = false;
47         return true;
48       }
49       else
50       {
51         return false;
52       }
53     }
54 
55     protected virtual double CalculateRandomValue(int BaseValue, int Variability)
56     {
57       return BaseValue - (BaseValue * Variability / 100) + (BaseValue * Rnd.Next(0, (Variability * 2) + 1) / 100);
58     }
59   }

Explanation

The class Animal declares the following variables:

NaturalLifespan

This is calculated using the AvgLifespan declared when an instance of the class is created (see Instantiation). This determines the age at which the animal dies.

ID

What it says on the tin. The unique identifier for each fox.

NextID

Used to increment the ID assigned to each fox, so each fox is assigned a unique ID.

Age

Again, what it says on the tin. The age of the fox.

ProbabilityOfDeathOtherCauses

Similarly to AvgLifespan, AvgProbabilityOfDeathOtherCauses is also declared when an instance of the class is created and calculated using this value and a random variability.