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我可能完全找错了树,但它确实编译了,只是崩溃了。我最近 2 周才在做 C++,主要来自 Java 背景,这不是很广泛!!
任何人,我有一个房间类。我想设置4个导出,北、南、东、西。我有创建一个 setExits() 方法的想法,该方法采用 4 个 Room 指针。每个 Room 对象都有一个调用该指针的 goNorth() 等方法。
Room::Room(QString name, QString shortD, QString longD, QImage roomImage)
{
this->name = name;
this->shortD = shortD;
this->longD = longD;
this->roomImage = roomImage;
}
QString Room::shortDescription()
{
return shortD;
}
QString Room::longDescription()
{
return longD;
}
QImage Room::showImage()
{
return roomImage;
}
void Room::setExits(Room *north, Room *south, Room *east, Room *west)
{
this->north = north;
this->south = south;
this->east = east;
this->west = west;
}
Room* Room::goNorth()
{
return north;
}
我是这样调用和设置的。
void TheIslandMain::createRooms()
{
//Room *forest, *lake; - declare as global in theislandmain.h?
forest = new Room(readRooms("../Island/Rooms/forest.name"), readRooms("../Island/Rooms/forest.short"), readRooms("../Island/Rooms/forest.long"), getImage("../Island/Rooms/forest.jpg"));
//forest->setExits(lake, currentRoom, currentRoom, currentRoom);
lake = new Room(readRooms("../Island/Rooms/lake.name"), readRooms("../Island/Rooms/lake.short"), readRooms("../Island/Rooms/lake.long"), getImage("../Island/Rooms/lake.jpg"));
currentRoom = forest;
}
当单击 gui 中的按钮时,我使用以下代码。
void TheIslandMain::on_northButton_clicked()
{
ui->roomDesc->clear();
currentRoom = lake;
//currentRoom = currentRoom->goNorth();
ui->actionLabel->setText(currentRoom->shortDescription());
ui->imageArea->setPixmap(QPixmap::fromImage(currentRoom->showImage()));
}
我已经注释掉了我想使用的代码,这给出了错误。现在的代码可以正常工作。当我再次取消注释代码时,它会编译文件,但一旦我单击 North 按钮并崩溃,我就会收到 255 错误。
我什至不确定这样做是否合法,这只是我在考虑的事情。我完全是在吠叫错误的树吗?就像我说的,我只是在学习 C++,我们实际上还没有在类里面对指针做任何事情。
我对注释代码的理解是,我正在将 currentRoom 变量的内存引用更改为 Room 对象中的引用 north,它本身取自主类中定义的引用。
对不起,如果我是愚蠢的!