Question

c语言链表写入文件出现乱码

int write_data(USR *head)
{
FILE *fp = NULL;
USR *cur = NULL;

fp = fopen("linkdb","w");
if(NULL == fp)
return 1;
cur = head->next;
while(cur != NULL){
fwrite(cur,sizeof(USR),1,fp);
cur = cur->next;
}
fclose(fp);
return 0;
}

Answer 1

fwrite(cur,sizeof(*USR),1,fp);

sizeof(USR) = 4; //一个指针大小
sizeof(*USR) = USR结构体大小;

Answer 2

这用的二进制输出流。你用记事本打开肯定不能看啊。