#include <iostream>
using namespace std;
class WeaponBehavior
{
public:
void virtual useWeapon() = 0;
};
class AK47:public WeaponBehavior
{
public:
void useWeapon()
{
cout << "Use AK47 to shoot!" << endl;
}
};
class Knife:public WeaponBehavior
{
public:
void useWeapon()
{
cout << "Use Knife to kill!" << endl;
}
};
class Character
{
public:
Character()
{
weapon = 0;
}
void setWeapon(WeaponBehavior *w)
{
this->weapon = w;
}
void virtual fight() = 0;
protected:
WeaponBehavior *weapon;
};
class King:public Character
{
public:
void fight()
{
cout << "The king:" ;
if ( this->weapon == NULL)
{
cout << "You don't have a weapon! Please Set Weapon!" << endl;
}
else
{
weapon->useWeapon();
}
}
};
int main()
{
WeaponBehavior *ak47 = new AK47();
WeaponBehavior *knife = new Knife();
Character *kin = new King();
kin->fight();
cout << endl;
kin->setWeapon(ak47);
kin->fight();
cout << endl;
kin->setWeapon(knife);
kin->fight();
return 0;
}
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