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#include
#include
#include
#define LEN sizeof(struct car)
#define NULL 0
struct car
{
	int num; //编号
	unsigned int vin;//发动机号
	unsigned int old;//使用年限
	long double price;//原价
	long double att;//磨损
	long double realprice;//实际车价
	unsigned int car_age;//使用车龄
	struct car *next;
};
struct car *creat(void)
{   //建立汽车数据
	struct car *p1,*p2,*head;
	p1=p2=(struct car *)malloc(LEN);
	head=NULL;
	for(int i=0;i<3;i++)
	{//建立一个有10辆汽车信息的链表
		printf("pleae input the information of the car(%d):\n",i);
		printf("order:\tnum\tvin\told\tprice\tcar_age:\n");
		scanf("%d%ld%ld%Lf%ld",&p1->num,&p1->vin,&p1->old,&p1->price,&p1->car_age);
		p1->att=p1->old*4;//磨损=使用年限(old)*4
		p1->realprice=p1->price-p1->att;//实际车价=原价(price)-磨损(att)
		if(i==0)
			head=p1;		
		p2=p1;
		p1=(struct car*)malloc(LEN);
		p2->next=p1;
	}
	p2->next=NULL;
	return head;
}
void print(struct car *head)
{  //打印函数.
	printf("\tnum\tvin\told\tprice\tatt\trealprice\tcar_age\n");
	for(struct car *p=head;p!=NULL;p=p->next)
		printf("\t%d\t%ld\t%ld\t%.2f\t%.2f\t%.2f\t\t%d\n",p->num,p->vin,p->old,p->price,p->att,p->realprice,p->car_age);
}
void order(struct car *head)
{  //按编号从小至大排序
	int num;
	unsigned int vin,car_age,old;
	long double price,att,realprice;
	struct car *p1,*p2;
	for(p1=head;p1->next!=NULL;p1=p1->next)
		for(p2=p1->next;p2!=NULL;p2=p2->next)
			if(p1->num>p2->num)
			{
				num=p1->num;
				p1->num=p2->num;
				p2->num=num;
				
				vin=p1->vin;
				p1->vin=p2->vin;
				p2->vin=vin;

				old=p1->old;
				p1->old=p2->old;
				p2->old=old;
				
				price=p1->price;
				p1->price=p2->price;
				p2->price=price;

				att=p1->att;
				p1->att=p2->att;
				p2->att=att;

				realprice=p1->realprice;
				p1->realprice=p2->realprice;
				p2->realprice=realprice;

				car_age=p1->car_age;
				p1->car_age=p2->car_age;
				p2->car_age=car_age;
			}
}
struct car *insert(struct car *head)
{   //插入一辆汽车的信息
	struct car *p;
	p=(struct car *)malloc(LEN);
	printf("insert a car information:\n");
	printf("order:\tnum\tvin\told\tprice\tcar_age:\n");
	scanf("%d%ld%ld%Lf%ld",&p->num,&p->vin,&p->old,&p->price,&p->car_age);
	p->att=p->old*4;//磨损=使用年限(old)*4
	p->realprice=p->price-p->att;//实际车价=原价(price)-磨损(att)
	p->next=head;//插入信息结点接到首结点之前
	head=p;
	order(head);//调用排序
	return head;
}
void check(struct car *head)
{ //查找
	printf("please input the num of the car:\n");
	int num,flag=0;
	scanf("%d",&num);
	for(struct car *p=head;p!=NULL;p=p->next)
		if(p->num==num)
		{
			printf("found:\n");
			printf("\tnum\tvin\told\tprice\tatt\trealprice\tcar_age\n");
			printf("\t%d\t%ld\t%ld\t%.2f\t%.2f\t%.2f\t\t%d\n",p->num,p->vin,p->old,p->price,p->att,p->realprice,p->car_age);
			flag=1;
		}
	if(!flag)
		printf("Not found!\n");
}
struct car *delete_vin(struct car *head)
{   //删除指定编号
	struct car *p1,*p2;
	printf("please input the vin of the car(delete):\n");
	unsigned int vin;
	scanf("%ld",&vin);
	for(p2=p1=head;p2!=NULL;p1=p2,p2=p2->next)
		if(p2->vin==vin)
			if(p2==head)
				head=head->next;
			else 
				if(p2->next==NULL)
					p1->next=NULL;
				else
					p1->next=p2->next;
	return head;
}
void car_age_first(struct car *head)
{   //显示使用年龄最高的某部车信息.
	struct car *p=head,*ptemp=head;;
	unsigned int age_max=p->car_age;
	for(p=p->next;p!=NULL;p=p->next)
		if(p->car_age>age_max)
		{
			age_max=p->car_age;
			ptemp=p;
		}
	printf("the age of the car is:\n");
	printf("\tnum\tvin\told\tprice\tatt\trealprice\tcar_age\n");
	printf("\t%d\t%ld\t%ld\t%.2f\t%.2f\t%.2f\t\t%d\n",ptemp->num,ptemp->vin,ptemp->old,ptemp->price,ptemp->att,ptemp->realprice,ptemp->car_age);
}
main()
{
	struct car *head;
	head=creat();
	print(head);
	order(head);//调用排序函数
	print(head);
	car_age_first(head);//使用年龄max
//	head=insert(head);//插入一个结点
//	print(head);
//	check(head);查找某编号
//	head=delete_vin(head); //删除特定编号
//	print(head);
}