[C, C++] Sorted Doubly Linked List

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

typedef struct {
	int data;
	struct Node *prev;
	struct Node *next;
} Node;

Node *head, *tail;

void insert(int data) {
	Node* node = (Node*)malloc(sizeof(Node));
	node->data = data;

	Node* cur;
	cur = head->next;
	while (cur->data < data && cur != tail) {
		cur = cur->next;
	}

	Node* prev = cur->prev;

	prev->next = node;
	node->prev = prev;

	cur->prev = node;
	node->next = cur;
}

void removeFront() {
	Node* node = head->next;
	head->next = node->next;

	Node* next = node->next;
	next->prev = head;

	free(node);
}

void show() {
	Node* cur = head->next;
	while (cur != tail) {
		printf("%d \n", cur->data);
		cur = cur->next;
	}
}

int main(void) {
	head = (Node*)malloc(sizeof(Node));
	tail = (Node*)malloc(sizeof(Node));
	head->prev = head;
	head->next = tail;
	tail->prev = head;
	tail->next = tail;

	insert(4);
	insert(9);
	insert(3);
	insert(1);
	insert(8);
	insert(7);
	insert(6);
	insert(2);
	removeFront();
	show();

	system("pause");
	return 0;
}

 

be the happy Gosu.

woojja ))*

\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\