#include "list.h"

void addcar() /* 新建卡*/
{ 
	FILE *fp; 
	int i=0; 
	fp=fopen("car.txt","a+"); /*添加卡號*/ 
	printf("請你輸入卡號\n"); 
	scanf("%d",&car[i].carnum); 
	printf("請你輸入學生姓名\n"); 
	scanf("%s",car[i].studentname); 
	printf("請你輸入班級\n"); 
	scanf("%d",&car[i].studentclass); 
	fwrite(&car[i],sizeof(struct car),1,fp); /*添加卡號*/
	fclose(fp); 
	printf("輸入完畢，任意鍵返回\n"); 
	getch(); 
} 

void carcount() /* 統計借書卡*/
{ 
	FILE *fp; 
	int i,n=0; 
	fp=fopen("car.txt","r"); 
	for(i=0;fread(&car[i],sizeof(struct car),1,fp)!=0;i++) 
	{ 
		printf("第%d張卡<卡號：%d 姓名：%s 班級：%d>\n",i+1,car[i].carnum,car[i].studentname,car[i].studentclass); 
		n=n+1; 
	} 
	fclose(fp); 
	printf("目前共有%d本書\n",n); 
	printf("按任意鍵\n"); 
	getch(); 
} 

void delcar() /* 刪除借書卡*/
{ 
	FILE *fp,*fp2; 
	int i; 
	int carnum; 
	char choice; 
	fp=fopen("car.txt","r"); 
	fp2=fopen("bookl.txt","w"); 
	printf("請輸入你要刪除的卡號\n"); 
	printf("如果你輸入的卡號存在，系統自動刪除該信息！如果不存在，系統不做任何改動\n"); 
	
	
	scanf("%d",&carnum); 
	for(i=0;fread(&car[i],sizeof(struct car),1,fp)!=0;i++) 
	{ 
		if(car[i].carnum!=carnum) 
		{ 
			fwrite(&car[i],sizeof(struct car),1,fp2); 
		} 
	} 
	fclose(fp); 
	fclose(fp2); 
	printf("是否真的要刪除該卡？刪除后該書籍的所有信息將無法恢復《Y/N》\n"); 
	scanf("%s",&choice); 
	if(choice=='y'||choice=='Y') 
	{ 
		fp=fopen("car.txt","w"); 
		fp2=fopen("bookl.txt","r"); 
		for(i=0;fread(&car[i],sizeof(struct car),1,fp2)!=0;i++) 
		{ 
			fwrite(&car[i],sizeof(struct car),1,fp); 
		} 
		fclose(fp); 
		fclose(fp2); 
		fp2=fopen("bookl.txt","w"); 
		fclose(fp2); 
		printf("按任意鍵返回\n"); 
		getch(); 
		return; 
	} 
	else 
	{ 
		printf("按任意鍵返回\n"); 
		getch(); 
		return; 
	} 
}