如何解决带有继承的前向声明并包含 |不完整的类型或预期的类名 有没有可能让它工作?
有人可以帮忙吗?
房间.h
#ifndef ROOM_H
#define ROOM_H
#include "Console.h"
...
class Room {
public:
void room();
};
#endif // ROOM_H
Room.cpp
#include "Room.h"
void Room::room() {
Console::print();
}
控制台.h
#ifndef CONSOLE_H
#define CONSOLE_H
#include "Room.h"
#include "RoomChild.h"
class Console {
public:
static void print();
static void printRoom(Room& room);
static void printRoomChild(RoomChild& room);
};
#endif // CONSOLE_H
控制台.cpp
#include "Console.h"
void Console::print() {
;
}
void Console::printRoom(Room& room) {
// print member of room
}
void Console::printRoomChild(RoomChild& roomChild) {
// print member of roomChild
}
RoomChild.h
#ifndef ROOM_CHILD_H
#define ROOM_CHILD_H
#include "Room.h"
#include "Console.h"
class RoomChild : public Room {
public:
void roomChild();
};
#endif // ROOM_CHILD_H
RoomChild.cpp
#include "RoomChild.h"
void RoomChild::roomChild() {
Console::print();
}
我的问题是
有没有可能让它工作?
我试图向每个类或仅向其中一些类提出声明。但是,它不起作用并给我 ... has incomplete type
或 expected class-name before '{' token class RoomChild: public Room {
解决方法
包含的内容都被搞砸了。
从不相关的文件中删除多余的包含指令。
在依赖它们的文件上添加包含指令。
房间.h
#ifndef ROOM_H
#define ROOM_H
/* DELETE: because Room.h does not depend on it.
#include "Console.h"
*/
// ...
class Room {
public:
void room();
};
#endif // ROOM_H
Room.cpp
#include "Room.h"
/* ADD: because Room.cpp does depend on it. */
#include "Console.h"
void Room::room() {
Console::print();
}
Console.h
#ifndef CONSOLE_H
#define CONSOLE_H
/* DELETE: because Console.h does not depend on them.
#include "Room.h"
#include "RoomChild.h"
*/
class Console {
public:
static void print();
};
#endif // CONSOLE_H
控制台.cpp
#include "Console.h"
void Console::print() {
;
}
RoomChild.h
#ifndef ROOM_CHILD_H
#define ROOM_CHILD_H
#include "Room.h"
/* DELETE: because RoomChild.h does not depend on it
#include "Console.h"
*/
class RoomChild : public Room {
public:
void roomChild();
};
#endif // ROOM_CHILD_H
RoomChild.cpp
#include "RoomChild.h"
/* ADD: because RoomChild.cpp does depend on it. */
#include "Console.h"
void RoomChild::roomChild() {
Console::print();
}
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