Dołączanie plików

Witam mam mały problem mam kod>

#ifndef chicken_h
#define chicken_h
#include<iostream>
#include<cstdlib>
void chicken_attributes ()
{
   	int life_chicken=50;
  	int damage_chicken=rand ()%20+1;
    int defence_chicken=5;
  	int money_drop_chicken=rand ()%50+1;
    int exp_chicken=20;
}


void wild_chicken_attributes ()
{
    int life_wild_chicken=65;
    int damage_wild_chicken=rand()%25+5;
    int defence_wild_chicken=10;
    int drop_money_wild_chicken=rand()%50+15;
    int exp_wild_chicken=40;

}

i później wstawiam to do>

#ifndef defender_fight_with_chicken_h
#define defender_fight_with_chicken_h
#include<iostream>
#include "chicken.h"
using namespace std;

void defencer_fight_with_pair_chicken()
{
     life_chicken_pair=life_chicken*2;
     damage_chicken_pair=damage_chicken*2;
     deffence_chicken_pair=deffence_chicken*2;

    damage_defencer-=deffence_chicken_pair;
	damage_chicken_pair-=deffence_defencer*0,5;

    life_defencer-=damage_chicken_pair;
	//+deffence_warrior
	life_chicken_pair-=damage_defencer;
}

A program mi mówi, że nie jest zadeklarowane life?chicken i nie wiem czemu. Może mi ktoś z was podpowiedzieć co ja źle robię? Miłego wieczorku i dobranoc.