#include<stdio.h>
#include<stdlib.h>
#include<string.h>
typedef struct
{
char id[10];	//序号 
char name[20];	//名字 
char xinghao[10];//型号 
int price;		//价格 
char from[20];	//产地 
int cun;		//存货 
int yiding;		//已定数 
}shop; 

typedef struct
{
char place[20];	//客户地址 
char call[15];	//客户电话 
char thing[20]; //购买的物品 
}info;

void buy();
void present_all(); 
void present_kehu();
int main(){
	
	 
	printf("------商店管理系统------\n");
	printf("1.购买商品\n2.查询客户信息\n");
	printf("输入你需要的功能所代表的序号\n");
	int pok; scanf("%d",&pok);
	
	switch(pok)
	{
	case 1:
	system("cls");	
	buy(); break;
	case 2:
	present_kehu();	break;	
	}

	
	return 0;
}
void buy()
{
		FILE *p,*q,*z;
		char name[20];
		int num;
		info kehu;
		
		if((p=fopen("商品信息.txt","r"))==NULL)
		{
		printf("open erro 25"); exit(0);	
		}
		
		if((q=fopen("商品数量.txt","r"))==NULL)
		{
		printf("open erro 35"); exit(0);	
		}
		
		if((z=fopen("客户信息.txt","a"))==NULL)
		{
		printf("erro45"); exit(0);	
		}
		
		fscanf(q,"%d",&num);
		
		printf("------商店购买系统-------\n");
		printf("本店已有商品如下\n");
		present_all();
		printf("\n");
		
		printf("请输入你要购买的商品名称或编号\n");
		scanf("%s",name);
		system("cls");
		shop x[50];
		for(int i=0;i<num;i++)
		{
			fscanf(p,"%s%s%s%d%s%d%d",&x[i].id,&x[i].name,&x[i].xinghao,&x[i].price,&x[i].from,&x[i].cun,&x[i].yiding);
		}
		//输入数据//
		for(int i=0;i<num;i++)
		{
			if(strcmp(name,x[i].id)==0||strcmp(name,x[i].name)==0)
			{
			
				if(x[i].cun==0) 
				{
				printf("对不起，您要买的商品已经没有库存了\n");
				break;
				}
				
				printf("您购买的商品的信息为:\n");	
				printf("编号：%s\n名字：%s\n型号：%s\n价格：%d\n产地:%s\n存货：%d\n已订:%d\n",x[i].id,x[i].name,x[i].xinghao,x[i].price,x[i].from,x[i].cun,x[i].yiding);
				printf("你是否要订购此商品？确定输入1，否输入2\n");
			
				
		
				int kk;
				scanf("%d",&kk); 
				switch(kk)
				{
			
				case 1:
				system("cls");
				
				printf("请输入你的地址信息\n");
				scanf("%s",kehu.place);
				printf("请输入你的电话信息\n");
				scanf("%s",kehu.call);
				fprintf(z,"\n%s %s %s",kehu.place,kehu.call,x[i].name);
				printf("订购成功\n");
				x[i].cun--;//存-1 
				x[i].yiding++;//已定+1 
				fclose(p);
				
				if((p=fopen("商品信息.txt","w"))==NULL) // 重置// 
				{
				printf("open erro 25"); exit(0);	
				}
				for(int k=0;k<num;k++)
				{
				fprintf(p,"%s %s %s %d %s %d %d\n",x[k].id,x[k].name,x[k].xinghao,x[k].price,x[k].from,x[k].cun,x[k].yiding);	
				}
				
				printf("你是否还要购买其他的产品？\n1.是\n2.不是\n");
				int kkk;scanf("%d",&kkk);
				
				switch(kkk)
				{
				case 1:
				fclose(p);
				fclose(q);
				fclose(z);
				buy();	
				break;
				default:printf("欢迎您下次继续加购\n"); 
				} 	
				break;
				
				default:system("cls");printf("欢迎您下次继续光临\n");break;
				
			}
			break;
			}
			if(i==num-1) printf("没有查到此商品\n");
		}
		fclose(p); 
		fclose(q);
		fclose(z); 

}
void present_all()//展示商品信息// 
{
	FILE *p,*q;
	int num;
	if((p=fopen("商品信息.txt","r"))==NULL)
		{
		printf("open erro 25"); exit(0);	
		}
		
		if((q=fopen("商品数量.txt","r"))==NULL)
		{
		printf("open erro 35"); exit(0);	
		}
		
		fscanf(q,"%d",&num);
		shop x[50];
		for(int i=0;i<num;i++)
		{
		fscanf(p,"%s%s%s%d%s%d%d",&x[i].id,&x[i].name,&x[i].xinghao,&x[i].price,&x[i].from,&x[i].cun,&x[i].yiding);		
		printf("编号：%2s  名字：%6s  型号：%3s  价格：%3d  产地：%s  存货：%d  已定：%d\n",x[i].id,x[i].name,x[i].xinghao,x[i].price,x[i].from,x[i].cun,x[i].yiding);
		}
	fclose(p);
	fclose(q);
}
void present_kehu() //展示客户信息// 
{
	FILE *p;
	system("cls");
	printf("-------全部客户信息-------\n");
	if((p=fopen("客户信息.txt","r"))==NULL)
	{
	printf("erro 169"); exit(0);	
	}
	info x;
	while((fscanf(p,"%s%s%s",&x.place,&x.call,&x.thing))!=EOF)	
		printf("地址：%s 电话：%s 商品：%s\n",x.place,x.call,x.thing);
	
	fclose(p);
}