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

public class ShotShell : MonoBehaviour
{
    public GameObject shellPrefab;
    public float shotSpeed;
    public AudioClip shotSound;
    // ★追加
    public int shotCount;

    private float timeBetweenShot = 0.35f;
    private float timer;

    void Update()
    {
        timer += Time.deltaTime;

        if (Input.GetKeyDown(KeyCode.Space) && timer > timeBetweenShot)
        {
            // ★追加
            // （ポイント）returnの働きをおさえる。
            if (shotCount < 1)
            {
                return;
            }

            // ★追加
            shotCount -= 1;

            timer = 0.0f;
            GameObject shell = Instantiate(shellPrefab, transform.position, Quaternion.identity);
            Rigidbody shellRb = shell.GetComponent<Rigidbody>();
            shellRb.AddForce(transform.forward * shotSpeed);
            Destroy(shell, 3.0f);
            AudioSource.PlayClipAtPoint(shotSound, transform.position);
        }
    }
}

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

public class ShotShell : MonoBehaviour
{
    public GameObject shellPrefab;
    public float shotSpeed;
    public AudioClip shotSound;
    public int shotCount;
    private float timeBetweenShot = 0.35f;
    private float timer;

    void Update()
    {
        timer += Time.deltaTime;

        if (Input.GetKeyDown(KeyCode.Space) && timer > timeBetweenShot)
        {

            // ★★理解度アップ
            // 下記の一行をここに加える。
            AudioSource.PlayClipAtPoint(shotSound, transform.position);

            if (shotCount < 1)
            {
                return;
            }

            shotCount -= 1;

            timer = 0.0f;
            GameObject shell = Instantiate(shellPrefab, transform.position, Quaternion.identity);
            Rigidbody shellRb = shell.GetComponent<Rigidbody>();
            shellRb.AddForce(transform.forward * shotSpeed);
            Destroy(shell, 3.0f);

            // ★★理解度アップ
            // 下記の一行をコメントアウトする。
            // AudioSource.PlayClipAtPoint(shotSound, transform.position);
        }
    }
}