题解 | #反转链表#

```/**
 * struct ListNode {
 *	int val;
 *	struct ListNode *next;
 * };
 *
 * C语言声明定义全局变量请加上static，防止重复定义
 */

struct ListNode* ReverseList(struct ListNode* pHead ) {
    if(!pHead)return NULL;
    if(pHead->next==NULL)return pHead;
    struct ListNode *p,*t;
    t=pHead->next;
    p=pHead;p->next=NULL;
    while(t){
        p=t;
        t=t->next;
        p->next=pHead;
        pHead=p;
    }
    return p;
}