Question

我正在尝试使用c ++构建我的第一个游戏，并且我正在尝试创建一个Inventory系统，该系统允许我在Item容器中管理和排列不同的Inventory数据类型类型。在下面的代码中我只编写了类声明，但我想知道如何制作＆＃34; Item＆＃34;我创建的类包含任何不同的继承项的数据类型，例如Weapon，Apparel和Aid类别。它会像使用template参数一样简单吗？如果是这样，那么我的问题是像Constructor这样的东西如何理解在创建项目的每个实例中该怎么做？ default Constructor可能必须是我决定设置的基本武器，对吗？如果有人有任何建议或链接提供，将不胜感激。

谢谢！

ITEM.H：

#ifndef ITEM_H
#define ITEM_H

#include <iostream>

/*************************************************
* ITEM CLASS
* *This class is the type of data to be put into
*  the Inventory Container class.
**************************************************/
class Item
{
public:

private:

};

/*************************************************
* WEAPON CLASS
* *This class is a type of Item that classifies a
*  weapon item that can be in an Inventory.
**************************************************/
class Weapon : public Item
{
public:

private:

};

/*************************************************
* APPAREL CLASS
* *This class is a type of Item that classifies an
*  apparel item that can be in an Inventory.
**************************************************/
class Apparel : public Item
{
public:

private:

};

/*************************************************
* AID CLASS
* *This class is a type of Item that classifies an
*  Aid item that can be in an Inventory.
**************************************************/
class Aid : public Item
{
public:

private:

};

#endif //ITEM_H

编辑：

以下是我现在的情况：

/*************************************************
* ITEM CLASS
* *This class is the type of data to be put into
*  the Inventory Container class.
**************************************************/
template <class T>
class Item
{
public:


private:
    T item_type;         //i.e. Weapon, Apparel, Aid, etc...

};

/*****************************************************************
* ITEM : WEAPON 
* *Below is the code for all the different Weapon classes.
******************************************************************/

/*************************************************
* WEAPON CLASS
* *This class is a type of Item that classifies a
*  weapon item that can be in an Inventory.
**************************************************/
template <class T>
class Weapon : public Item
{
public:

private:
    T weapon_type;      //i.e. Melee, Ranged, etc...
};

/*************************************************
* MELEE CLASS
* *This class is a type of Item that classifies a
*  melee item that will be used as a weapon.
**************************************************/
template <class T>
class Melee : public Weapon
{
public:

private:

};

/*************************************************
* RANGED CLASS
* *This class is a type of Item that classifies a
*  ranged item that will be used as a weapon.
**************************************************/
template <class T>
class Ranged : public Weapon
{
public:

private:

};

另一个编辑：这是最新的代码：

/*************************************************
* ITEM CLASS
* *This class is the type of data to be put into
*  the Inventory Container class.
**************************************************/
template <class T>
class Item
{
public:


protected:
    T item_type;         //i.e. Weapon, Apparel, Aid, etc...

};

/*****************************************************************
* ITEM : WEAPON 
* *Below is the code for all the different Weapon classes.
******************************************************************/

//WEAPON CLASS
template <class T>
class Weapon : public Item
{
public:

protected:
    T weapon_type;      //i.e. Melee, Ranged, etc...
};

//MELEE CLASS
template <class T>
class Melee : public Weapon
{
public:

protected:
    T melee_type;      //i.e. Blade, Blunt, Fist, etc...

};

//BLADE CLASS
template <class T>
class Blade : public Melee
{
public:

protected:
    T blade_type;      //i.e. Dagger, Sword, etc...
};

//DAGGER CLASS
template <class T>
class Dagger : public Blade
{
public:
    //Default Constructor...the only Constructor
    Dagger() : damage(1), weight(0.5) { }

    //getters
    std::string getType() const { return "Dagger"; }

protected:
    int   damage;      //amount of damage it can inflict
    float weight;      //weight of the dagger
};

Answer 1

一种解决方案是将您的类型定义为enum s。

enum ITEM_TYPE { IT_WEAPON, IT_END };
enum WEAPON_TYPE { WT_MELEE, WT_RANGED, WT_END };

class Item {
public:
    Item(ITEM_TYPE type) : item_type(type) {}
protected:
    ITEM_TYPE item_type;
};

class Weapon : public Item {
public:
    Weapon(WEAPON_TYPE type) : Item(IT_WEAPON), weapon_type(type) {}
protected:
    WEAPON_TYPE weapon_type;
};

class MeleeWeapon : public Weapon {
public:
    MeleeWeapon() : Weapon(WT_MELEE) {}
};

class RangedWeapon : public Weapon {
public:
    RangedWeapon() : Weapon(WT_RANGED) {}
};

Answer 2

您不能也不应该需要存储类型（在C ++语言中的类型），使用虚函数来实现您想要的。

android {
  ...
  defaultConfig {
    ...
    jackOptions {
      enabled true
    }
  }
  compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
  }
}

请参阅http://cpp.sh/6cjlt

如何使用继承的自定义类c ++创建一个类型

2 个答案: