6 extern bool test_hit_fire(int chance, monster_type *m_ptr, int vis, char* o_name);
7 extern HIT_POINT critical_shot(WEIGHT weight, int plus_ammo, int plus_bow, HIT_POINT dam);
8 extern ENERGY bow_energy(OBJECT_SUBTYPE_VALUE sval);
9 extern int bow_tmul(OBJECT_SUBTYPE_VALUE sval);
10 extern HIT_POINT calc_crit_ratio_shot(HIT_POINT plus_ammo, HIT_POINT plus_bow);
11 extern HIT_POINT calc_expect_crit_shot(WEIGHT weight, int plus_ammo, int plus_bow, HIT_POINT dam);
12 extern HIT_POINT calc_expect_crit(WEIGHT weight, int plus, HIT_POINT dam, s16b meichuu, bool dokubari);