how can i auto target Gameobject on startup

i know im doing this really wrong help if possible (trying to set the target automatically on start up to the player (PC) but unsure how i know every thing i has work when i drag the object to the target but i need to auto target

/// /// EnemyAttack.cs /// Oct 20, 2010

/// /// This is a very basic Mob Attack script that we are going to use to get use to coding in C# and Unity /// /// This script is ment to be attached to a mob, or a mob prefab /// using UnityEngine; using System.Collections;

public class EnemyAttack : MonoBehaviour { public GameObject target; public float attackTimer; public float coolDown;

 public string playertarget;

 // Use this for initialization
 void Start () {
     attackTimer = 0;
     coolDown = 2.5f;
     
     PC = GameObject.FindGameObjectWithTag("PC");
 }
 
 // Update is called once per frame
 void Update () {
     if(attackTimer > 0)
         attackTimer -= Time.deltaTime;
     
     if(attackTimer < 0)
         attackTimer = 0;
     
     if(attackTimer == 0) {
         Attack();
         attackTimer = coolDown;
         
         PC.PLAYER_TAG("PC")// i know im doing this really wrong help if possible (trying to set the target automaticly on start up to the player (PC) 
                                 //but unsure how i know every thing i has work when i drag the object to the target but i need to auto target
     }
 }
 
 private void Attack() {
     float distance = Vector3.Distance(target.transform.position, transform.position);
     
     Vector3 dir = (target.transform.position - transform.position).normalized;
     
     float direction = Vector3.Dot(dir, transform.forward);
     
     if(distance < 2.5f) {
         if(direction > 0) {
             PlayerHealth eh = (PlayerHealth)target.GetComponent("PlayerHealth");
             eh.AddjustCurrentHealth(-10);
         }
     }
 }

}