我搜索了高低的答案，我知道我的错（退出代码：-1073741819）是由一般访问冲突引起的，但无法弄清楚我的代码是如何产生此错误的。
为了让事情变得更加奇怪，这个程序在不到一周前编译并运行，尽管有一些错误。我没有更改任何代码，今天打开它以快速查看我的代码，因为我明天正在接受采访，并且会弹出这个错误。
SIGSEGV发生在item.cpp类的第23行，return ItemPicture所在的位置。
对于代码墙感到抱歉，但最好包含所有内容。提前谢谢！
以下是该计划的完整代码：
inventory.h
#ifndef INVENTORY_H
#define INVENTORY_H
#include <iostream>
#include <vector>
#include "item.h"
using namespace std;
class Inventory
{
private:
vector<Item> inventory;
vector<string> inventoryItems;
public:
Inventory();
void deleteItem(int i);
Item *getItem(int i);
bool hasItem(int i);
void addItem(Item *inItem);
int getSize();
bool hasString(string inString);
};
#endif // INVENTORY_H
inventory.cpp
#include "inventory.h"
#include "item.h"
using namespace std;
Inventory::Inventory()
{
}
void Inventory::addItem(Item *inItem)
{
inventory.push_back(*inItem);
inventoryItems.push_back(inItem->getDescription());
}
void Inventory::deleteItem(int i)
{
inventory.erase(inventory.begin()+i);
}
bool Inventory::hasItem(int i){
if(inventory.size() > i){
return true;
}
return false;
}
Item* Inventory::getItem(int i){
return &inventory[i];
}
int Inventory::getSize(){
return inventory.size();
}
bool Inventory::hasString(string inString){
if(std::find(inventoryItems.begin(), inventoryItems.end(), inString) != inventoryItems.end()){
return true;
}else{
return false;
}
}
item.h
#ifndef ITEM_H
#define ITEM_H
#include<QMainWindow>
using namespace std;
class Item
{
public:
Item(string inDescription, QPixmap *pic, int value);
int getValue();
void setValue(int inValue);
string getDescription();
QPixmap getPic();
void setPic(QPixmap pic);
private:
QPixmap itemPicture;
int value;
string description;
};
#endif // ITEM_H
item.cpp
#include "item.h"
Item::Item(string inDescription, QPixmap *pic, int inValue){
itemPicture = *pic;
value = inValue;
description = inDescription;
}
int Item::getValue(){
return value;
}
void Item::setValue(int inValue){
value = inValue;
}
string Item::getDescription(){
return description;
}
QPixmap Item::getPic(){
return itemPicture; //ERROR OCCURS HERE
}
void Item::setPic(QPixmap inPic){
itemPicture = inPic;
}
room.h
#ifndef ROOM_H
#define ROOM_H
#include<QMainWindow>
#include <map>
#include <string>
#include <vector>
#include "item.h"
using namespace std;
using std::vector;
class Room
{
private:
string description;
int roomNum;
map<string, Room*> exits;
vector <Item> itemsInRoom;
QPixmap roomImage;
bool locked;
public:
Room(int roomNum, string description, QPixmap *pic);
void setExits(Room *north = NULL, Room *east = NULL, Room *south = NULL, Room *west = NULL);
void setImage(QPixmap *pic);
QPixmap getImage();
string shortDescription();
string longDescription();
Room *nextRoom(string direction);
Item *getItem(int i);
void deleteItem(int i);
bool hasItem(int i);
void addItem(Item*inItem);
int getRoomNum();
int getSize();
bool getLocked();
void setLocked(bool value);
};
#endif // ROOM_H
room.cpp
#include "room.h"
#include "inventory.h"
#include <QPixmap>
Room::Room(int roomNum, string description, QPixmap *pic) {
this->description = description;
this->roomImage = *pic;
this->roomNum = roomNum;
if(roomNum == 7){
locked = true;
}else{
locked = false;
}
}
void Room::setExits(Room *north, Room *east, Room *south, Room *west) {
if (north != NULL)
exits["north"] = north;
if (east != NULL)
exits["east"] = east;
if (south != NULL)
exits["south"] = south;
if (west != NULL)
exits["west"] = west;
}
string Room::shortDescription() {
return description;
}
string Room::longDescription() {
if(itemsInRoom.size()>0)
return "You are in " + description+". There may be items in this room that could help you..";
else{
return "You are in " + description;
}
}
bool Room::hasItem(int i){
if(itemsInRoom.size() > i){
return true;
}
return false;
}
void Room::addItem(Item *inItem) {
itemsInRoom.push_back(*inItem);
}
void Room::deleteItem(int i) {
itemsInRoom.erase(itemsInRoom.begin()+i);
}
Item* Room::getItem(int i){
return &itemsInRoom[i];
}
int Room::getRoomNum(){
return roomNum;
}
void Room::setImage(QPixmap *pic){
roomImage = *pic;
}
QPixmap Room::getImage(){
return roomImage;
}
int Room::getSize(){
return itemsInRoom.size();
}
Room* Room::nextRoom(string direction) {
map<string, Room*>::iterator next = exits.find(direction);
if (next == exits.end())
return NULL;
return next->second;
}
bool Room::getLocked()
{
return locked;
}
void Room::setLocked(bool value)
{
locked = value;
}
rungame.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QFileInfo>
#include "room.h"
#include "item.h"
#include "inventory.h"
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
void createRooms();
void play();
void display();
void setItems();
void takeItems(int i);
void dropItems(int i);
void displayInventory();
void setVisibleItems();
Room *lockedRoom;
private slots:
void on_northButton_clicked();
void on_eastButton_clicked();
void on_westButton_clicked();
void on_southButton_clicked();
void on_mapButton_clicked();
void on_inventDropButton1_clicked();
void on_inventDropButton2_clicked();
void on_inventDropButton3_clicked();
void setDirectionButtonsOn();
void on_roomTakeButton1_clicked();
void on_roomTakeButton2_clicked();
private:
Ui::MainWindow *ui;
Room *startingRoom, *currentRoom, *nextRoom;
Inventory *inventory;
Item *currentItem;
Item *equippedItem;
QPixmap roomImage;
string direction;
bool b;
void setDirectionButtons(bool inState);
};
#endif // MAINWINDOW_H
rungame.cpp
#include "ui_mainwindow.h"
#include "rungame.h"
#include "inventory.h"
#include "room.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
w.play();
return a.exec();
}
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
ui->imgLabel->updatesEnabled();
inventory = new Inventory();
ui->consoleOut->setReadOnly(true);
setItems();
createRooms();
setVisibleItems();
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::createRooms()
{
Room *cell, *solitaryHall, *chrisCell, *showerHall, *canteenHall, *canteen, *guardOffice,
*visitRoom, *yard, *parkingLot, *runningTrack, *entrance, *shower;
cell = new Room(1, "your cell", new QPixmap(":/img/img/cell.png"));
cell->addItem(new Item("Shank", new QPixmap(":/img/img/shank.png"), 1));
cell->addItem(new Item("Soap", new QPixmap(":/img/img/soap.png"), 2));
solitaryHall = new Room(2, "the solitary confinement hall", new QPixmap(":/img/img/solitaryhall.png"));
chrisCell = new Room(3, "Chris' cell", new QPixmap(":/img/img/chriscell.png"));
showerHall = new Room(4, "the shower hall", new QPixmap(":/img/img/showerhall.png"));
canteenHall = new Room(5, "the canteen Hall", new QPixmap(":/img/img/canteenhall.png"));
canteen = new Room(6, "the canteen", new QPixmap(":/img/img/canteen.png"));
canteen->addItem(new Item("Standard Prison Meal", new QPixmap(":/img/img/meal.png"), 4));
canteen->addItem(new Item("Fork", new QPixmap(":/img/img/fork.png"), 5));
guardOffice = new Room(7, "the guards office", new QPixmap(":/img/img/guardoffice.png"));
guardOffice->addItem(new Item("Guard Uniform", new QPixmap(":/img/img/uniform.png"),6));
visitRoom = new Room(8, "the visitors Room", new QPixmap(":/img/img/visitroom.png"));
yard = new Room(9, "the yard", new QPixmap(":/img/img/yard.png"));
parkingLot = new Room(10, "Parking Lot", new QPixmap(":/img/img/parkinglot.png"));
runningTrack = new Room(11, "Running Track", new QPixmap(":/img/img/runningTrack.png"));
entrance = new Room(12, "Prison Entrance", new QPixmap(":/img/img/entrance.png"));
shower = new Room(13, "Showers", new QPixmap(":/img/img/shower.png"));
//NORTH, EAST, SOUTH, WEST
cell->setExits(solitaryHall, NULL, NULL, NULL);
solitaryHall->setExits(chrisCell, showerHall, cell, NULL);
chrisCell->setExits(NULL, NULL, solitaryHall, NULL);
showerHall->setExits(shower, canteenHall, NULL, solitaryHall);
canteenHall->setExits(canteen, NULL, guardOffice, showerHall);
canteen->setExits(NULL, NULL, canteenHall, NULL);
guardOffice->setExits(canteenHall, visitRoom, NULL, NULL);
visitRoom->setExits(NULL, yard, NULL, guardOffice);
yard->setExits(runningTrack, parkingLot, entrance, visitRoom);
shower->setExits(NULL, NULL, showerHall, NULL);
startingRoom = cell;
currentRoom = cell;
lockedRoom = guardOffice;
roomImage = currentRoom->getImage();
ui->imgLabel->setPixmap(roomImage);
}
void MainWindow::play()
{
ui->consoleOut->append("You are sitting at your desk reading a book. The lights go"
" out and you hear your cell door unbolt. It starts to creak"
" open. Will you leave?");
ui->consoleOut->append("");
}
void MainWindow::takeItems(int i)
{
if(inventory->getSize() < 3){
switch(i){
case 0: ui->inventSlot1->setVisible(false); ui->roomTakeButton1->setVisible(false); break;
case 1: ui->inventSlot2->setVisible(false); ui->roomTakeButton2->setVisible(false); break;
}
inventory->addItem(currentRoom->getItem(i));
ui->consoleOut->append(QString::fromStdString("You have taken the: " + currentRoom->getItem(i)->getDescription()));
currentRoom->deleteItem(i);
displayInventory();
}else{
ui->consoleOut->append("Inventory full. Please drop an item.");
ui->consoleOut->append("");
}
setItems();
}
void MainWindow::dropItems(int i)
{
if(inventory->getSize() > 0){
switch(i){
case 0: ui->inventSlot1->setVisible(true); ui->inventDropButton1->setVisible(true); break;
case 1: ui->inventSlot2->setVisible(true); ui->inventDropButton2->setVisible(true); break;
}
currentRoom->addItem(inventory->getItem(i));
ui->consoleOut->append(QString::fromStdString("You have dropped the: " + inventory->getItem(i)->getDescription()));
if(currentRoom->getRoomNum()==13){
ui->consoleOut->append("You are lucky nobody is around!");
}
inventory->deleteItem(i);
displayInventory();
}
}
void MainWindow::setVisibleItems()
{
ui->roomTakeButton1->setVisible(true);
ui->roomTakeButton2->setVisible(true);
ui->roomSlot1->setVisible(true);
ui->roomSlot2->setVisible(true);
ui->inventSlot1->setVisible(false);
ui->inventSlot2->setVisible(false);
ui->inventSlot3->setVisible(false);
ui->imgLabel->setVisible(true);
}
void MainWindow::display()
{
setDirectionButtons(true);
b = true;
ui->consoleOut->append(QString::fromStdString("Go " + direction));
ui->consoleOut->append("");
nextRoom = currentRoom->nextRoom(direction);
if(currentRoom->getRoomNum()==5){
if(inventory->hasString("Fork")){
lockedRoom->setLocked(false);
}
}
if(currentRoom->getRoomNum()==5 && inventory->hasString("Fork")){
ui->consoleOut->append("You use the fork in your inventory to pick the lock.");
}
if(nextRoom == NULL){
ui->consoleOut->append("You cannot go that way.");
ui->consoleOut->append("");
}else if(nextRoom->getLocked()){
ui->consoleOut->append("This door is locked. Look around for something to help open it, or pick the lock!");
ui->consoleOut->append("");
}else{
currentRoom = nextRoom;
ui->imgLabel->setPixmap(currentRoom->getImage());
ui->imgLabel->update();
ui->consoleOut->append(QString::fromStdString(currentRoom->longDescription()));
ui->consoleOut->append("");
}
if(currentRoom->getRoomNum() == 13 && inventory->hasString("Soap")){
ui->consoleOut->append("You have Soap in your inventory, be careful not to drop it!");
ui->consoleOut->append("");
}
if(currentRoom->getRoomNum() == 9){
ui->consoleOut->append("You look around for possible escape methods. ");
ui->consoleOut->append("North) You can try and jump the chain fence surrounding the running track ");
ui->consoleOut->append("East) Go into the parking lot and look for a car to hide in ");
ui->consoleOut->append("South) Walk directly past the guards (Hint: if you have a uniform they might not notice)");
}
if(currentRoom->getRoomNum() == 10){
ui->consoleOut->append("You climb into the back of a delivery truck unnoticed."
"The driver starts his engine and drives away. You have escaped!");
ui->consoleOut->append("");
ui->imgLabel->setPixmap(QPixmap(":/img/img/parkinglot.png"));
setVisibleItems();
setDirectionButtons(false);
}else if(currentRoom->getRoomNum() == 11){
ui->consoleOut->append("You make a run for the chainlink fence but a guard dog notices you."
"The dog catches up and gets a firm grip of your leg. You're going nowhere."
"You have failed to escape.");
ui->consoleOut->append("");
ui->imgLabel->setPixmap(QPixmap(":/img/img/runningtrack.png"));
setVisibleItems();
setDirectionButtons(false);
}else if(currentRoom->getRoomNum() == 12){
if(inventory->hasString("Guards Uniform")){
ui->consoleOut->append("You walk boldly past the guards at the main entrance."
"They are too busy fixing the power to notice you are a prisoner in their uniform. You have escaped!");
ui->consoleOut->append("");
setVisibleItems();
setDirectionButtons(false);
ui->imgLabel->setPixmap(QPixmap(":/img/img/escape.png"));
}else{
ui->consoleOut->append("You try walking past the guards in your prisoner unifrom."
"You are immediately spotted and caught by the guards. You have failed to escape.");
ui->imgLabel->setPixmap(QPixmap(":/img/img/prisoner.png"));
setVisibleItems();
setDirectionButtons(false);
}
}
}
void MainWindow::displayInventory()
{
int i = 0;
ui->inventSlot1->setVisible(false);
ui->inventSlot2->setVisible(false);
ui->inventSlot3->setVisible(false);
ui->inventDropButton1->setVisible(false);
ui->inventDropButton2->setVisible(false);
ui->inventDropButton3->setVisible(false);
while(inventory->hasItem(i)){
switch(i){
case 0:
ui->inventSlot1->setPixmap(QPixmap(inventory->getItem(i)->getPic()));
ui->inventSlot1->setVisible(true);
ui->inventDropButton1->setVisible(true);
break;
case 1:
ui->inventSlot2->setPixmap(QPixmap(inventory->getItem(i)->getPic()));
ui->inventSlot2->setVisible(true);
ui->inventDropButton2->setVisible(true);
break;
case 2:
ui->inventSlot3->setPixmap(QPixmap(inventory->getItem(i)->getPic()));
ui->inventSlot3->setVisible(true);
ui->inventDropButton3->setVisible(true);
break;
}
i++;
}
}
void MainWindow::setItems()
{
if(currentRoom->hasItem(0)){
ui->roomSlot1->setPixmap(currentRoom->getItem(0)->getPic());
ui->roomSlot1->setVisible(true);
ui->roomTakeButton1->setVisible(true);
}else{
ui->roomSlot1->setVisible(false);
ui->roomTakeButton1->setVisible(false);
}
if(currentRoom->hasItem(1)){
ui->roomSlot2->setPixmap(currentRoom->getItem(1)->getPic());
ui->roomSlot2->setVisible(true);
ui->roomTakeButton2->setVisible(true);
}else{
ui->roomSlot2->setVisible(false);
ui->roomTakeButton2->setVisible(false);
}
}
void MainWindow::on_mapButton_clicked()
{
int i = currentRoom->getRoomNum();
switch(i){
case 1: ui->imgLabel->setPixmap(QPixmap(":/img/img/map1.png"));break;
case 2: ui->imgLabel->setPixmap(QPixmap(":/img/img/map2.png")); break;
case 3: ui->imgLabel->setPixmap(QPixmap(":/img/img/map3.png")); break;
case 4: ui->imgLabel->setPixmap(QPixmap(":/img/img/map4.png")); break;
case 5: ui->imgLabel->setPixmap(QPixmap(":/img/img/map5.png")); break;
case 6: ui->imgLabel->setPixmap(QPixmap(":/img/img/map6.png")); break;
case 7: ui->imgLabel->setPixmap(QPixmap(":/img/img/map7.png")); break;
case 8: ui->imgLabel->setPixmap(QPixmap(":/img/img/map8.png")); break;
case 9: ui->imgLabel->setPixmap(QPixmap(":/img/img/map9.png")); break;
case 10: ui->imgLabel->setPixmap(QPixmap(":/img/img/map10.png")); break;
case 11: ui->imgLabel->setPixmap(QPixmap(":/img/img/map11.png")); break;
case 12: ui->imgLabel->setPixmap(QPixmap(":/img/img/map12.png")); break;
case 13: ui->imgLabel->setPixmap(QPixmap(":/img/img/map13.png")); break;
}
}
void MainWindow::on_northButton_clicked()
{
direction = "north";
display();
}
void MainWindow::on_southButton_clicked()
{
direction = "south";
display();
}
void MainWindow::on_eastButton_clicked()
{
direction = "east";
display();
}
void MainWindow::on_westButton_clicked()
{
direction = "west";
display();
}
void MainWindow::setDirectionButtons(bool inState){
ui->eastButton->setVisible(inState);
ui->westButton->setVisible(inState);
ui->southButton->setVisible(inState);
ui->northButton->setVisible(inState);
ui->roomSlot1->setVisible(inState);
ui->roomSlot2->setVisible(inState);
ui->roomTakeButton1->setVisible(inState);
ui->roomTakeButton2->setVisible(inState);
setItems();
}
void MainWindow::on_roomTakeButton1_clicked()
{
takeItems(0);
}
void MainWindow::on_roomTakeButton2_clicked()
{
takeItems(1);
}
void MainWindow::on_inventDropButton1_clicked()
{
dropItems(0);
}
void MainWindow::on_inventDropButton2_clicked()
{
dropItems(1);
}
void MainWindow::on_inventDropButton3_clicked()
{
dropItems(2);
}
void MainWindow::setDirectionButtonsOn()
{
ui->northButton->setVisible(true);
ui->eastButton->setVisible(true);
ui->southButton->setVisible(true);
ui->westButton->setVisible(true);
}