从我读过的内容来看，这个错误通常发生在迭代器超出范围时，但我在一个空向量上遇到了这个问题。
这是保存向量的 Player 类：
播放器.h：
#pragma once
#include "Item.h"
#include "Room.h"
#include <vector>
#include <memory>
#include <string>
using namespace std;
class Player
{
private:
int health;
string name;
shared_ptr<Room> currentRoom;
vector<shared_ptr<Item> > inventory;
public:
Player(void);
Player(string);
~Player(void);
void changeHealth(int);
void setRoom(shared_ptr<Room>);
shared_ptr<Room> getRoom();
unsigned int getInventorySize();
};
播放器.cpp：
#include "Player.h"
#include <iostream>
#include <memory>
#include <string>
Player::Player(void)
{
health = 20;
}
Player::Player(string newName)
{
name = newName;
}
Player::~Player(void)
{
}
void Player::changeHealth(int amount){
health += amount;
}
void Player::setRoom(shared_ptr<Room> newRoom){
currentRoom = newRoom;
}
shared_ptr<Room> Player::getRoom(){
return currentRoom;
}
unsigned int Player::getInventorySize(){
return inventory.size();
}
我注释掉了 Player 中影响库存的所有其他方法。主要是，我制作了一个玩家对象，但我没有对库存做任何事情，所以它应该是完全空的，getInventorySize 应该返回 0，对吗？但是当我这样做时：
cout<<player->getInventorySize();
程序因向量下标超出范围错误而崩溃。这是怎么回事？=\
完整的主要：
#include "World.h"
#include "Player.h"
#include "Room.h"
#include "Item.h"
#include "Option.h"
#include "RoomOption.h"
#include <iostream>
#include <memory>
#include <string>
#include <stdlib.h>
typedef shared_ptr<Option> optionPtr;
typedef shared_ptr<Item> itemPtr;
typedef shared_ptr<Room> roomPtr;
const int healthPackID =0;
World world;
void createWorld(void);
void main(){
createWorld();
shared_ptr<Player> player = world.getPlayer();
int selection = 0, inventoryOption = 0, exitOption = 0;
do{
inventoryOption = player->getRoom()->getNumOptions() + 1;
exitOption = inventoryOption + 1;
cout<<player->getRoom()->getDescription()<<endl;
player->getRoom()->printOptions();
cout<< inventoryOption <<". View Inventory"<<endl;
cout<< exitOption <<". Quit game"<<endl<<endl;
cin>>selection;
string optionType = typeid(*(player->getRoom()->getOption(selection- 1).get())).name();
if(selection == inventoryOption){
cout<<player->getInventorySize();
}
else if( optionType.compare("class RoomOption") == 0){
player->setRoom(player->getRoom()->getOption(selection- 1)->getRoom());
cout<< "RoomOption!"<<endl;
}
else{
cout<< "Not RoomOption =("<<endl;
}
system("CLS");
}while(selection != exitOption);
}
void createWorld(){
shared_ptr<Player> player(new Player("Ted"));
world.setPlayer(player);
roomPtr outside(new Room(0, "You're outside", ""));
roomPtr hallway(new Room(1, "It's a hallway", ""));
roomPtr kitchen(new Room(2, "It's the kitchen", ""));
roomPtr livingRoom(new Room(3, "You're in the living room", ""));
roomPtr upstairs(new Room(4, "You're on the upstairs landing but all the doors are barred shut", ""));
outside->addOption(optionPtr(new RoomOption(0, "Go inside", hallway)));
hallway->addOption(optionPtr(new RoomOption(0, "Go straight ahead into the kitchen", kitchen)));
hallway->addOption(optionPtr(new RoomOption(1, "Go right into the living room", livingRoom)));
hallway->addOption(optionPtr(new RoomOption(2, "Go upstairs", upstairs)));
hallway->addOption(optionPtr(new RoomOption(3, "Go back outside", outside)));
hallway->addItem(itemPtr(new Item(healthPackID, "Health Pack", "A pack full of first aid items like bandages and surgical spirits. Use it to increase your health", 3)));
kitchen->addOption(optionPtr(new RoomOption(0, "Go right into the living room", livingRoom)));
kitchen->addOption(optionPtr(new RoomOption(1, "Go back into the hallway", hallway)));
kitchen->addItem(itemPtr(new Item(1, "Cake", "A piece of tasty cake", 1)));
kitchen->addItem(itemPtr(new Item(2, "Beer", "A cold bottle of generic brand beer", 1)));
livingRoom->addOption(optionPtr(new RoomOption(0, "Go left into the kitchen", kitchen)));
livingRoom->addOption(optionPtr(new RoomOption(1, "Go back into the hallway",hallway)));
upstairs->addOption(optionPtr(new RoomOption(0, "Go back downstairs", hallway)));
world.addRoom(outside);
world.addRoom(kitchen);
world.addRoom(livingRoom);
world.addRoom(hallway);
world.addRoom(upstairs);
player->setRoom(outside);
}