雙向鍊錶的C 實現

首先定義節點的結構

struct node 

;

class doublelink

protected:
private:
int length;
node* root;
};

int doublelink::doublelink_insert(doublelink *ptr, int position, int member)

else
else
nodeinsert->next = current;
nodeinsert->prev = current->prev;
current->prev->next = nodeinsert;
//nodeinsert->next = nodeinsert; 
current->prev = nodeinsert;
ptr->length++;
return 0;
} }}

int doublelink::doublelink_erase(doublelink* ptr, int position)

else
deletenode->prev->next = deletenode->next;
deletenode->next->prev = deletenode->prev;
delete deletenode;
ptr->length--;
} }}

測試正確~~

雙向鍊錶（C實現）

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雙向鍊錶與單鏈表有許多的相似之處，但是也有不同之處。雙向鍊錶與單鏈表主要的不同在於 雙向鍊錶可以從兩個方向進行遍歷，但是單鏈表只能從頭節點遍歷到尾節點，不能從尾節點遍歷到頭節點，對於鍊錶中一些插入和刪除等操作，雙向鍊錶較單鏈表更為簡單些。所以，雙向鍊錶有其存在的特殊意義。下面是通過c 來實現雙向鍊錶...

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