u011747505的专栏

#include <stdio.h> union myunion{ int a; char b; }; int main() { // 方法一，联合体 myunion d; d.a=0x12345678; printf("0x%x\n",d.b); if(d.b==0x78) { printf("小端\n"); } else if(d.b==0x12) { printf("大端\n").

#include <stdio.h> struct listNode{ int data; struct listNode* next; }; struct listNode *ReverseList(struct listNode* head) { if (head==NULL || head->next==NULL) { return head; } struct listNode *previous=NULL; .