链表反转问题，看不懂其中指针的方向

Question

class Solution {
public:
/**
* @param head: The first node of linked list.
* @return: The new head of reversed linked list.
*/
ListNode *reverse(ListNode *head) {
ListNode *prev = NULL;
while (head != NULL) {
ListNode *temp = head->next;
head->next = prev;
prev = head;
head = temp;
}
return prev;
}
};
求帮忙把这个转化成图形连接，实在看不懂其中的逻辑，尤其是 head->next = prev,prev=head,head =temp，看不懂其中指针的变化

Answer 1

手头没有markdown只有笔和纸，楼主见谅