- Moved calc_dmg to characters.h

- put vampire into new source files

src/vampire.cc

@@ -0,0 +1,31 @@
+#include "vampire.h"
+
+#include <algorithm>
+#include <math.h>
+
+
+result vampire::attack(const direction dir, const character_list &chlist) {
+        position tmp{pos + MOVE[dir]};
+
+        for (auto &ch : chlist)
+                if (tmp == ch->get_position()) {
+                        auto res = ch->get_hit(race, ATK, base_hitrate);
+                        if (res != result::miss) {
+                                HP += GAIN_HP;
+                        }
+                        return res;
+                }
+
+        return result::fine;
+}
+
+result vampire::get_hit(const enum race &race, const int atk,
+                      const float hitrate) {
+        if (rng.rand_num() <= hitrate * (float)RAND_MAX) 
+                HP = std::max(HP - calc_dmg(atk, DEF), 0);
+
+        if (HP == 0)
+                return result::died;
+
+        return result::hit;
+}