我正在设置一个原型c ++控制台应用程序。该程序包含一些虚拟类和指针等。当程序在主要功能中到达下面的代码行时，它将崩溃。我相信这与访问该指针处的内存有关。
主要（）
...
Player _player(); //new player object created
Actor *player = &_player; //pointer to player created
...
//note player and get_inventory() are/return a pointer
{
Inventory* a = player->get_Inventory();
a->set_testMe("testedMe");
string result = a->get_testMe();
cout << result << endl;
}
{
Inventory* a = player->get_Inventory();
string result = a->get_testMe(); //This causes error
cout << result << endl;
}
...
Actor.cpp // get_Inventory（）
...
Inventory* Actor::get_Inventory()
{
Inventory mInventory = this->actorInventory;
Inventory * pInventory = &mInventory;
return pInventory;
}
...
库存文件
...
Inventory::Inventory()
{
this->testMe = "initial test";
}
void Inventory::set_testMe(string input)
{
this->testMe = input;
}
string Inventory::get_testMe()
{
return this->testMe;
}
...
有任何想法吗？谢谢
这将返回一个指向局部变量的指针：
Inventory* Actor::get_Inventory()
{
Inventory mInventory = this->actorInventory;
Inventory * pInventory = &mInventory;
return pInventory;
}
第一条语句复制this->actorInventory到局部变量（如方法局部get_Inventory），然后返回指向该局部变量的指针。从中返回后get_Inventory()，该变量将超出范围，不再存在。
您可能想要尝试this->actorInventory直接返回指向的指针：
Inventory *Actor::get_Inventory()
{
return &actorInventory;
}
或者，如果您不希望调用者修改actorInventory，请返回一个const合格的指针：
const Inventory *Actor::get_Inventory() const
{
return &actorInventory;
}
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我来说两句