using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class GPManager : MonoBehaviour
{
    private Text gpLabel;
    public int gpPoint;

    void Start()
    {
        gpPoint = 0;
        gpLabel = GetComponent<Text>();
        gpLabel.text = "GP:" + gpPoint.ToString("D10"); // 0埋めの表示の仕方
    }

    public void AddGP(int amount)
    {
        gpPoint += amount;
        gpLabel.text = "GP:" + gpPoint.ToString("D10");
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class EnemyHP : MonoBehaviour
{
    public GameObject effectPrefab;
    public AudioClip sound;

    // ★追加
    private GPManager gP;
    public int gpPoint;

    // ★追加
    private void Start()
    {
        gP = GameObject.Find("GPLabel").GetComponent<GPManager>();
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.gameObject.tag == "Shell")
        {
            Destroy(gameObject);
            GameObject effect = Instantiate(effectPrefab, transform.position, Quaternion.identity);
            Destroy(effect, 0.3f);
            AudioSource.PlayClipAtPoint(sound, transform.position);

            // ★追加
            gP.AddGP(gpPoint);
        }
    }
}