我正在制作一个roguelike游戏,我已经设置好了,所以在MOST上会有3个怪物出现在一个关卡上。所以我有三个指向怪物的指针。它们都以NULL开头。
在那个怪物死后,我应该如何将指针设置回NULL?或许我的想法错了?基本上我需要移除怪物,直到指针再生为另一个怪物。
我尝试过一些事情,但我只是不断遇到seg故障。
我尝试使用擦除,删除,只需将其设置为NULL,然后重新创建它。无法理解。
以下是我设置指针的方法:
CreatureFactory myCreatures = CreatureFactory::instance();
Creature * pCreature1 = NULL;
Creature * pCreature2 = NULL;
Creature * pCreature3 = NULL;;
ItemFactory myItems = ItemFactory::instance();
Item * pItem1 = myItems.generateItem();
dl.placeInGame(personPlaying,randomGen);
int monsterCount = 0;
int turnCount = 0;
bool playingGame = true;
char playerController;
while (playingGame){
if ((turnCount % 2 == 0) && (personPlaying.getHP() < personPlay$
personPlaying.generateHP();
}
if (((turnCount % 3) == 0) && (monsterCount < 2)){
if(pCreature1 == NULL){
pCreature1 = myCreatures.generateCreature(4);
dl.placeInGame(pCreature1,randomGen);
monsterCount += 1;
}
else if(pCreature2 == NULL){
pCreature2 = myCreatures.generateCreature(4);
dl.placeInGame(pCreature2, randomGen);
monsterCount += 1;
}
else if(pCreature3 == NULL){
pCreature3 = myCreatures.generateCreature(4);
monsterCount += 1;
}
}
dl.dump();
personPlaying.dumpStats();
CreatureFactory code..
CreatureFactory & CreatureFactory::instance(){
static CreatureFactory myObj;
return myObj;
}
CreatureFactory::CreatureFactory(){
m_mtRandom.seed( time(NULL) );
fstream xmlFile;
xmlFile.open("critters.xml");
vector<XMLSerializable*> pObjects;
parseXML(xmlFile, pObjects);
XMLSerializable * pObject;
for(auto it = pObjects.begin(); it != pObjects.end(); it++){
pObject = (*it);
Creature * pCreature = dynamic_cast<Creature*>(pObject);
if (pCreature != NULL){
m_vCreatures.push_back(pCreature);
}
}
}
CreatureFactory::~CreatureFactory(){
}
Creature * CreatureFactory::generateCreature(int iMaxLevel) {
vector<Creature*> tempCreatures;
for(auto it = m_vCreatures.begin(); it != m_vCreatures.end(); it++){
if ((*it)->getLevel() <= iMaxLevel){
tempCreatures.push_back((*it));
}
}
int randomCreature = (m_mtRandom() % (tempCreatures.size() - 1));
Creature * pCreature = tempCreatures.at(randomCreature);
Creature * pReturnValue = new Creature(*pCreature);
return pReturnValue;
}
然后我做了大量的循环并使用了大量的类。这些怪物对象的指针通过大约6或7个类。其中一个我需要在HP击中0时设置为NULL。
由于
答案 0 :(得分:3)
在c ++中,你不应该将指针设置为null,因为Object仍然存在于内存中,但没有任何对它的引用 - >内存泄漏。 相反,您应该删除对象:
delete pCreatureN;
这将基本上从内存中删除对象,并使指针成为空指针。
之后pCreatureN = NULL;
没问题。