Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BattleSimulator
{
    class Program
    {
        public struct Army
        {
            public string Name;
            public Warrior[] Warriors;
            public int Xp;
        }

        public struct Warrior
        {
            public float X;
            public float Y;
            public string Name;
            public int Hp;
            public int Strength;
            public int Xp;
        }

        // find the first alive warrior from an array of warriors
        static int GetFirstAliveWarrior(Warrior[] warriors)
        {
            for (int i = 0; i < warriors.Length; i++)
            {
                if (warriors[i].Hp > 0)
                {
                    return i;
                }
            }

            return -1;
        }

        static bool Attack(ref Army attacker, ref Army defender)
        {
            int attackerWarriorIndex = GetFirstAliveWarrior(attacker.Warriors);
            // no alive warrior found
            if (attackerWarriorIndex < 0)
            {
                return true;
            }

            int defenderWarriorIndex = GetFirstAliveWarrior(defender.Warriors);
            // no alive warrior found
            if (defenderWarriorIndex < 0)
            {
                return true;
            }

            int attackerStrength = attacker.Warriors[attackerWarriorIndex].Strength;
            int attackerXp = attacker.Warriors[attackerWarriorIndex].Xp;

            defender.Warriors[defenderWarriorIndex].Hp -= attackerStrength * (1 + attackerXp);
            // if the defender dies, increase experience of the attacker
            if (defender.Warriors[defenderWarriorIndex].Hp <= 0)
            {
                attacker.Warriors[attackerWarriorIndex].Xp += 1;
            }

            int attackerHp = attacker.Warriors[attackerWarriorIndex].Hp;
            attackerXp = attacker.Warriors[attackerWarriorIndex].Xp;
            Console.WriteLine("Attacker Index: " + attackerWarriorIndex + " Hp: " + attackerHp + " Xp: " + attackerXp + " Strength: " + attackerStrength);

            int defenderHp = defender.Warriors[defenderWarriorIndex].Hp;
            int defenderStrength = defender.Warriors[defenderWarriorIndex].Strength;
            int defenderXp = defender.Warriors[defenderWarriorIndex].Xp;
            Console.WriteLine("Defender Index: " + defenderWarriorIndex + " Hp: " + defenderHp + " Xp: " + defenderXp + " Strength: " + defenderStrength);


            return false;
        }

        static void Main(string[] args)
        {

            Random random = new Random();

            Army redArmy = new Army();
            Army blueArmy = new Army();

            redArmy.Name = "Red";
            blueArmy.Name = "Blue";

            int numberOfWarriors = random.Next(10, 20);
            redArmy.Warriors = new Warrior[numberOfWarriors];

            numberOfWarriors = random.Next(10, 20);
            blueArmy.Warriors = new Warrior[numberOfWarriors];

            Console.WriteLine("Red Army: " + redArmy.Warriors.Length);

            Console.WriteLine("Blue Army: " + blueArmy.Warriors.Length);

            // iterate all warriors for red
            for (int i = 0; i < redArmy.Warriors.Length; i++)
            {
                redArmy.Warriors[i].Hp = random.Next(90, 130);
                redArmy.Warriors[i].Strength = random.Next(20, 60);
            }

            // iterate all warriors for blue
            for (int i = 0; i < blueArmy.Warriors.Length; i++)
            {
                blueArmy.Warriors[i].Hp = random.Next(90, 130);
                blueArmy.Warriors[i].Strength = random.Next(20, 60);
            }

            while (true)
            {
                // red attacks blue
                if (Attack(ref redArmy, ref blueArmy))
                {
                    break;
                }

                Console.WriteLine();

                // blue attacks red
                if (Attack(ref blueArmy, ref redArmy))
                {
                    break;
                }

                Console.WriteLine();

                Console.ReadLine();
            }
        }
    }
}