Add player_v2.cpp

player_v2.cpp

@@ -0,0 +1,81 @@
+#include <iostream>
+#include <string>
+using std::cout, std::string, std::endl;
+
+class Player
+{
+public:
+    string name;
+    int attack, defence, HP;
+
+public:
+    Player(string _name, int _attack, int _defence, int _HP)
+        : name{_name}, attack{_attack}, defence{_defence}, HP{_HP}
+    {
+    }
+    virtual void pk(Player *p)
+    {
+        while (HP > 0)
+        {
+            hit(p);
+            if (p->HP <= 0)
+            {
+                std::cout << p->name << "死亡！\n";
+                return;
+            }
+            p->hit(this);
+        }
+        std::cout << name << "死亡！\n";
+    }
+
+    virtual void hit(Player *p) = 0; // 纯虚函数
+};
+
+class Demon : public Player
+{
+public:
+    using Player::Player;
+    virtual void hit(Player *p)
+    {
+        p->HP -= attack - p->defence;
+        HP += attack - p->defence;
+        std::cout << name << "砍了" << p->name << "一刀，并吸了一口血\n";
+    }
+};
+
+class Angel : public Player
+{
+public:
+    using Player::Player;
+    void hit(Player *p)
+    {
+        p->HP -= attack - p->defence;
+        p->HP -= attack - p->defence;
+        std::cout << name << "砍了" << p->name << "两刀\n";
+        if (dynamic_cast<Demon *>(p)) // 向下转型
+        {
+            std::cout << "天使遇到了恶魔，再砍一刀！\n";
+            p->HP -= attack - p->defence;
+        }
+    }
+};
+
+class Ghost : public Player
+{
+public:
+    using Player::Player;
+    virtual void hit(Player *p)
+    {
+        p->HP -= (attack - p->defence) * 1.5;
+        HP += (attack - p->defence) * 0.5;
+        std::cout << name << "砍了" << p->name << "一大刀，并吸了一小口血\n";
+    }
+};
+
+int main()
+{
+    Angel a{"孙悟空", 100, 20, 1000};
+    Demon d{"牛魔王", 100, 20, 1000};
+    Ghost g{"白骨精", 100, 20, 1000};
+    a.pk(&d);
+}