基本的算法实践在上一篇博文，这篇博文向大家详细展示一下数据结构的高级应用，可能有些难，但这是重点，实用性很强，而且用的好往往事半功倍，想获得力量吗，开整：

我把他们分为这几块：

1. 链表反转：反转单向链表或双向链表。
2. 检测链表环：判断链表中是否存在环。
3. 合并两个有序链表：将两个有序链表合并成一个有序链表。
4. 从链表中删除重复节点：删除链表中的重复节点。
5. 链表排序：对链表进行排序（例如归并排序）。

下面一一用代码给出展示，代码完整，可以直接复制下来自己摸索，自己修改执行，也可以自己保留复习，话不多说，代码见：

C语言实现单向链表的高级操作

1. 链表反转

ListNode* reverse_list(ListNode* head) {ListNode* prev = NULL;ListNode* current = head;ListNode* next = NULL;while (current != NULL) {next = current->next;current->next = prev;prev = current;current = next;}return prev;
}

2. 检测链表环

int has_cycle(ListNode* head) {ListNode *slow = head, *fast = head;while (fast != NULL && fast->next != NULL) {slow = slow->next;fast = fast->next->next;if (slow == fast) {return 1;}}return 0;
}

3. 合并两个有序链表

ListNode* merge_sorted_lists(ListNode* l1, ListNode* l2) {if (!l1) return l2;if (!l2) return l1;if (l1->value < l2->value) {l1->next = merge_sorted_lists(l1->next, l2);return l1;} else {l2->next = merge_sorted_lists(l1, l2->next);return l2;}
}

4. 从链表中删除重复节点

void remove_duplicates(ListNode* head) {ListNode* current = head;while (current != NULL && current->next != NULL) {if (current->value == current->next->value) {ListNode* next_next = current->next->next;free(current->next);current->next = next_next;} else {current = current->next;}}
}

5. 链表排序（归并排序）

ListNode* sorted_merge(ListNode* a, ListNode* b) {if (!a) return b;if (!b) return a;if (a->value <= b->value) {a->next = sorted_merge(a->next, b);return a;} else {b->next = sorted_merge(a, b->next);return b;}
}void front_back_split(ListNode* source, ListNode** front, ListNode** back) {ListNode* fast = source->next;ListNode* slow = source;while (fast != NULL) {fast = fast->next;if (fast != NULL) {slow = slow->next;fast = fast->next;}}*front = source;*back = slow->next;slow->next = NULL;
}void merge_sort(ListNode** head_ref) {ListNode* head = *head_ref;if ((head == NULL) || (head->next == NULL)) {return;}ListNode* a;ListNode* b;front_back_split(head, &a, &b);merge_sort(&a);merge_sort(&b);*head_ref = sorted_merge(a, b);
}

C++实现双向链表的高级操作

1. 链表反转

void reverse_list() {DoubleListNode *temp = nullptr;DoubleListNode *current = head;while (current != nullptr) {temp = current->prev;current->prev = current->next;current->next = temp;current = current->prev;}if (temp != nullptr) {head = temp->prev;}
}

2. 检测链表环

bool has_cycle() {DoubleListNode *slow = head, *fast = head;while (fast != nullptr && fast->next != nullptr) {slow = slow->next;fast = fast->next->next;if (slow == fast) {return true;}}return false;
}

3. 合并两个有序链表

DoubleListNode* merge_sorted_lists(DoubleListNode* l1, DoubleListNode* l2) {if (!l1) return l2;if (!l2) return l1;if (l1->value < l2->value) {l1->next = merge_sorted_lists(l1->next, l2);if (l1->next != nullptr) {l1->next->prev = l1;}l1->prev = nullptr;return l1;} else {l2->next = merge_sorted_lists(l1, l2->next);if (l2->next != nullptr) {l2->next->prev = l2;}l2->prev = nullptr;return l2;}
}

4. 从链表中删除重复节点

void remove_duplicates() {DoubleListNode* current = head;while (current != nullptr) {DoubleListNode* runner = current->next;while (runner != nullptr) {if (current->value == runner->value) {DoubleListNode* next = runner->next;if (runner->prev) {runner->prev->next = runner->next;}if (runner->next) {runner->next->prev = runner->prev;}delete runner;runner = next;} else {runner = runner->next;}}current = current->next;}
}

5. 链表排序（归并排序）

DoubleListNode* sorted_merge(DoubleListNode* a, DoubleListNode* b) {if (!a) return b;if (!b) return a;if (a->value <= b->value) {a->next = sorted_merge(a->next, b);a->next->prev = a;a->prev = nullptr;return a;} else {b->next = sorted_merge(a, b->next);b->next->prev = b;b->prev = nullptr;return b;}
}void split(DoubleListNode* source, DoubleListNode** front, DoubleListNode** back) {DoubleListNode* fast = source->next;DoubleListNode* slow = source;while (fast != nullptr) {fast = fast->next;if (fast != nullptr) {slow = slow->next;fast = fast->next;}}*front = source;*back = slow->next;slow->next = nullptr;
}void merge_sort(DoubleListNode** head_ref) {DoubleListNode* head = *head_ref;if ((head == nullptr) || (head->next == nullptr)) {return;}DoubleListNode* a;DoubleListNode* b;split(head, &a, &b);merge_sort(&a);merge_sort(&b);*head_ref = sorted_merge(a, b);
}

是不是发现了一个尽分享干货的博主，创作属实不易，希望大家珍惜！