private void Shelling(Midnight_Hougeki shelling, int friendFleetIndex = 0, int enemyFleetIndex = 0)
{
if (shelling == null) return;
var friendDamage = shelling.GetFriendDamages();
var enemyDamage = shelling.GetEnemyFirstFleetDamages();
this.FriendFleet.Fleets[friendFleetIndex].CalcDamages(friendDamage);
this.EnemyFleet.Fleets[enemyFleetIndex].CalcDamages(enemyDamage);
}