标准c语言基础教程 练习13.1 编程练习 第5题 答案

struct phone_node{
	char name[20];
	char phone_num[20];
	struct phone_node * pre;
	struct phone_node * next;
};

#include <stdio.h>

void display_from_last(struct phone_node * poi)
{
	while (poi)
	{
		printf("%s 's telephone num is %s.\n", poi->name, poi->phone_num);
		poi = poi->pre;
	}
}
int main()
{
	struct phone_node t1 = { "jjw", "123456" };
	struct phone_node t2 = { "jwj", "234567" };
	struct phone_node t3 = { "jjw", "345678" };

	struct phone_node *first = &t1;
	struct phone_node *last = &t3;

	t1.next = &t2;
	t2.next = &t3;
	t3.next = NULL;

	t1.pre = NULL;
	t2.pre = &t1;
	t3.pre = &t2;

	display_from_last(last);
}