Question

我有一个Weapon.h / cpp类。多数民众赞成有一个枚举

Weapon.h
enum WEAPONTYPE {
    LASER,
    ROCKET
}

我有一个变量，我想用它来跟踪当前的枚举。

WEAPONTYPE currentWeapon;

我有一个函数将被调用来改变currentWeapon值。头文件中的声明是：

void weaponSelect(WEAPONTYPE choice);

并且.cpp文件中的声明是

void Weapon::weaponSelect(Weapon::WEAPONTYPE enumChoice)
{
    currentWeapon = enumChoice;
}

现在我收到的错误是：

错误C2511：'void Weapon :: weaponSelect（Weapon :: WEAPONTYPE）'：在'武器'中找不到重载的成员函数

感谢任何帮助。

编辑1：

Weapon.h

#ifndef WEAPON_H_
#define WEAPON_H_

class Weapon
{
public:
    Weapon(Ogre::SceneManager* localManager);
    virtual ~Weapon(void);

    void createBullet(Ogre::Vector3 cameraPosition);        //Create bullet nodes/entities.
    void weaponSelect(WEAPONTYPE enumChoice);                   //Function to select weapon type. Tried to have "WeaponType enumChoice" as parameter but would produce error.
    void updateBullet();                                    //Update bullet logic.

    enum WEAPONTYPE {
        LASER = 0,
        ROCKET = 1
    };

private:
    WEAPONTYPE currentWeapon;               //Enum var to track weapon selected.
    Ogre::SceneManager* localBulletSceneManager;    //Pointer to our application's scene manager
    std::vector<Ogre::SceneNode*>   bullets;        //List of pointers to the bullet nodes.
};
#endif

Weapon.cpp

#include "Weapon.h"
#include <OgreStringConverter.h>

using Ogre::SceneNode;
using Ogre::Entity;
using Ogre::String;
using Ogre::Vector3;

Weapon::Weapon(Ogre::SceneManager* localManager)
: localBulletSceneManager(nullptr)
, currentWeapon(LASER)
{
    this->localBulletSceneManager = localManager;
}

Weapon::~Weapon(void)
{

}

void Weapon::weaponSelect(WEAPONTYPE enumChoice)
{
    this->currentWeapon = enumChoice;
}

void Weapon::createBullet(Vector3 cameraPosition)
{
    //Pointers to use for Quick Node and Entity Creation - Get Reused once object is attached to scene.
    SceneNode* tempNode = nullptr;
    Entity*    tempEntity  = nullptr;

    //All our Objects are spheres, so create one mesh and reuse it with each entity.
    String bulletMesh = "Bullet";
    //Procedural::SphereGenerator().setRadius(1.f).setUTile(5.).setVTile(5.).realizeMesh(bulletMeshName);
    Procedural::ConeGenerator().setRadius(0.5F).setHeight(3.0F).realizeMesh(bulletMesh);

    for (int bulletAmount = 0; bulletAmount < 10; ++bulletAmount)
    {
        tempNode    = this->localBulletSceneManager->getRootSceneNode()->createChildSceneNode("RocketNode" + Ogre::StringConverter::toString(bulletAmount));
        tempEntity  = this->localBulletSceneManager->createEntity("RocketEntity" + Ogre::StringConverter::toString(bulletAmount), bulletMesh);
        //tempEntity->setMaterial(

        tempNode->attachObject(tempEntity);
        tempNode->setPosition(0,0,100 + (bulletAmount * 10));
    }

    switch (this->currentWeapon)
    {
    case LASER:
        break;

    case ROCKET:
        break;
    }
}

编辑2：虚空武器的恢复声明选择原始版本的.h和.cpp，其他海报不做任何修改。

Answer 1

将您的WEAPONTYPE声明移到课程顶部：

class Weapon {
public:
    enum WEAPONTYPE {
        LASER = 0,
        ROCKET = 1
    };

    Weapon(Ogre::SceneManager* localManager);
    // ...

错误是由编译器读取行时引起的：

void weaponSelect(WEAPONTYPE enumChoice);

它无法弄清WEAPONTYPE是什么。之所以发生这种情况，是因为enum的声明在课堂后期出现。

另外，我发现你正在使用C ++ 11：改为使用enum class：

enum class weapon {
    laser,
    rocket
};

Answer 2

如果在类外声明WEAPONTYPE，请使用以下语法：

void Weapon::weaponSelect(WEAPONTYPE enumChoice)
{
    currentWeapon = enumChoice;
}

如果在类中声明了这个枚举：

void Weapon::weaponSelect(Weapon::WEAPONTYPE enumChoice)
{
    this->currentWeapon = enumChoice;
}

您必须在使用之前声明枚举。

Answer 3

尝试将枚举WEAPONTYPE移动到weaponSelect的减速之前另外，我不明白你的API：一方面，您将weaponSelect声明为公开。但是，它的参数是受保护的枚举。您班级的用户如何使用它？这应该都具有相同的可访问性/.

将枚举作为参数传递

3 个答案: