C/C++ 单链表

#include<stdio.h>
#include<stdlib.h>

typedef int Item;

typedef struct node
{
	Item data;
	struct node *next;
}Node;


Node *first = NULL;

static void terminate(const char *message)
{
	printf("%s\n", message);
	exit(EXIT_FAILURE);
}

//在链表开始处插入结点
void add_to_list(Item x)
{
	Node *new_node;
	new_node = (Node *)malloc(sizeof(Node));

	if (new_node == NULL)
		terminate("Error: malloc failed in add_to list!");

	new_node->data = x;
	
	new_node->next = first;
	first=new_node;
}

void delete_element(Item x) {
	Node *prev, *cur;

	for (cur = first, prev = NULL;
		cur != NULL && cur->data != x;
		prev = cur, cur = cur->next);

	if (cur == NULL)
		printf("data was not found!");

	if (prev == NULL)
		first = first->next;
	else
	{
		prev->next = cur->next;
		free(cur);
	}
}


void select_list(Item x) {
	Node *p;

	for (p = first; p != NULL && p->data != x; p = p->next);

	if (p == NULL)
		printf("Don't find node!");
	else
		printf("find node!");
}

void print_list()
{
	Node *p;

	for (p = first; p != NULL; p = p->next) {
		printf(" %d ", p->data);
	}
}