internal static void exp_gain(Game_Actor actor, int gain)
{
if (actor != null)
{
while (gain != 0)
{
if (gain > 0)
{
actor.exp++;
if (actor.can_level())
{
gain--;
}
else
{
gain = 0;
}
}
else if (gain > 0)
{
actor.exp--;
gain++;
}
}
}
}