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

public class FireMissile : MonoBehaviour
{
    public GameObject missilePrefab;
    public float missileSpeed;
    public AudioClip fireSound;
    private int timeCount;

    // ★追加（弾切れ発生）
    private int maxPower = 100;
    private int shotPower;

    // ★追加（弾切れ発生）
    private void Start()
    {
        shotPower = maxPower;
    }

    void Update()
    {
        timeCount += 1;

        if (Input.GetButton("Jump"))
        {
            // ★追加（弾切れ発生）
            // ここのロジックをよく復習すること（重要ポイント）
            if(shotPower <= 0)
            {
                return;
            }

            // ★追加（弾切れ発生）
            shotPower -= 1;

            if (timeCount % 5 == 0)
            {
                GameObject missile = Instantiate(missilePrefab, transform.position, Quaternion.identity);
                Rigidbody missileRb = missile.GetComponent<Rigidbody>();
                missileRb.AddForce(transform.forward * missileSpeed);
                AudioSource.PlayClipAtPoint(fireSound, transform.position);
                Destroy(missile, 2.0f);
            }
        }
    }
}
C#