using System;

using System.Collections;

using System.Collections.Generic;

public class Program

{

    public float playerHP = 100;

    public float enemyDamage = 80;

    public static void Main()

    {

        Program obj = new Program();

        float currentPlayerHP = 999;

        Console.WriteLine("fn currentPlayerHP = "+currentPlayerHP);

        Console.WriteLine("fn test_out = "+obj.test_out(out currentPlayerHP));

    }

    private bool test_out(out float currentHP){

        currentHP = playerHP - enemyDamage;

     if(currentHP <0){ 

         return true;

     }else{

        return false;

     }

    }

    private bool test_ref(ref float currentHP){

    currentHP = playerHP - enemyDamage;

     if(currentHP <0){ 

         return true;

     }else{

        return false;

     }

    }

    public string test_fn(){

    return "OK";

    }

}