#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
struct infor {
	char num[50];
	char name[50];
	float price;
};
 struct infor g;
 FILE *part1;
 void menu_s();
 void input();
 void check();
 int main()
 {
 	system("cls");//清屏
	int n;
	menu_s();
	scanf("%d",&n);
	while(n)
	{
	system("cls");
	
		switch(n)
		{
			case 1:
			input() ;break;
			//case 2:
			//output();break;
			//case 3:
			//updata();break;
			case 4:
			check();break;
			//case 5:
			//sales();break;
			case 6:
			 return 0;
		} 
		getch();
		menu_s();
		scanf("%d",&n);
	 }
}
	 void menu_s ()
{
	printf("***********主菜单************\n");
	printf("*********1:商品入库*********\n");
	printf("*********2:商品出库*********\n");
	printf("*********3:更新库存*********\n");
	printf("*********4:查询库存*********\n");
	printf("*********5:销售统计*********\n");
	printf("*********6:退出系统*********\n");
	printf("*********请输入选项*********\n");
	printf("----------------------------\n"); 
}

	 void input()
{
	char next='y';
	part1=fopen("storg","rb+");
	if(part1==NULL)
	{
		part1=fopen("storg","wb+");
		if(part1==NULL)
		{
		printf("打开文件失败\n");
		exit(0);
	    }
	}
	//fseek(part1,0,SEEK_END);
	while(next=='y')
	{
		printf("\n请输入商品编号\n");
		gets(g.num );
		printf("\n请输入商品名称\n");
		gets(g.name );
		printf("\n请输入商品价格\n");
	    scanf("%lf",&g.price );
		fprintf(part1,"%10s%10s%10s",g.num ,g.name ,g.price );/*向文件写入数据*/
		printf("\n继续输入（y/n）\n");
		fflush(stdin);//清空缓存区。
		next=getch();
	}
	fclose(part1);	 
}
   void check()
{
	part1=fopen("storg","rb+");
	if(part1==NULL)
	{
		printf("打开文件失败\n");
		exit(1);
    }
    rewind(part1);
    printf("\n\n商品列表\n****************\n");
    printf("id       name      price\n");
    while(!feof(part1))
    {
    	fscanf(part1, "%10s%10s%10s",g.num ,g.name ,&g.price);
    	//从文件读出数据到结构体
		printf("%-10s %-10s %-10f\n",g.num ,g.name ,g.price); 
	}
	fclose(part1);
}