)大家好! 所以我有兩個類名爲DoubleNode(代表雙鏈表節點)和DoublyLinkedList(它的實現)。在DoubleNode類中,我指定DoublyLinkedList是它的朋友類,但IDE和編譯器認爲它好像是在DoubleNode類中重新定義DoublyLinkedList類而不是恢復它只是一個朋友類,並給出錯誤說「重新定義'DoublyLinkedList 「作爲不同的符號」 這裏是我的代碼:鏈接列表節點的C++朋友類
#ifndef DoubleNode_h
#define DoubleNode_h
using namespace std;
#include "DoublyLinkedList.h"
template <typename Type>
class DoubleNode {
private:
Type elem;
DoubleNode<Type>* next;
DoubleNode<Type>* prev;
friend class DoublyLinkedList<Type>;
public:
DoubleNode (Type const& e, DoubleNode* a, DoubleNode* b) {
elem = e;
next = a;
prev = b;
}
Type getData() const {
return elem;
}
DoubleNode * getNext() const {
return next;
}
DoubleNode * getPrevious() const {
return prev;
}
};
DoublyLinkedList.h
#ifndef DoublyLinkedList_h
#define DoublyLinkedList_h
#include "DoubleNode.h"
template <typename Type>
class DoublyLinkedList {
private:
DoubleNode<Type>* head;
DoubleNode<Type>* tail;
int size;
public:
DoublyLinkedList() {
head = new DoubleNode<Type>;
tail = new DoubleNode<Type>;
head->next = tail;
tail->prev = head;
head->prev = nullptr;
tail->next = nullptr;
size = 0;
}
~DoublyLinkedList() {
while (!empty())
pop_front();
delete head;
delete tail;
}
//Accessors
int size() const{
return size;
}
...
一個再次,編譯器給錯誤‘的重新定義‘DoublyLinkedList’作爲不同的符號’
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πάνταῥεῖ它在這裏。如果在 – Swift
@Swift THX之間沒有任何文字,SO就會將源文件塊合併到一起,以便找到該文件。 –