这是个餐厅信息管理系统，无任何errors和warning，在向菜单填菜的过程中利用了链表
，但是从打印菜单的结果来看，所有的菜肴信息都被存到了第一个链表内。（也许是）
已疯，还请大牛们不吝赐教。
增添菜肴信息函数
void Menu_Addition(void)
{
FILE fp;
fp=fopen("dish_information.txt","a+");
char choice='Y';
DISH *n1,*n2,*head=NULL;
head=(DISH)malloc(sizeof(DISH));
head->next=(DISH*)malloc(sizeof(DISH));
n1=head->next;
n1->next=NULL;
while(choice=='y'||choice=='Y')
{
system("cls");
printf("请输入菜肴编号:");
scanf("%d",&n1->Dish_ID);
fprintf(fp,"%d",n1->Dish_ID);
printf("\n请输入菜肴名称:");
scanf("%s",n1->Dish_Name);
fprintf(fp,"%s",n1->Dish_Name);
printf("\n请输入菜肴价格:");
scanf("%f",&n1->Dish_Price);
fprintf(fp,"%f",n1->Dish_Price);
printf("是否要添加下一道菜？y/n\n");
fflush(stdin);
scanf("%c",&choice);
if(choice=='y'||choice=='Y')
{
n2=(DISH*)malloc(sizeof(DISH));
n1->next=(DISH *)malloc(sizeof(DISH));
n1->next=n2;
n1=n2;
n1->next=NULL;
}
}
fclose(fp);
printf("修改成功，即将返回菜单管理\n");
Manager_Menu();
}
以下是打印菜单函数
void Dish_Menu(void)
{
FILE *fp;
fp=fopen("dish_information.txt","r");
DISH *head,*n1,*n2;
head=(DISH *)malloc(sizeof(DISH ));
head->next=(DISH *)malloc(sizeof(DISH ));
n1=head->next;
while(1)
{
fscanf(fp,"%d %s %f\n",&n1->Dish_ID,n1->Dish_Name,&n1->Dish_Price);
if(n1->next==NULL)///error
break;
printf("\n\t序号\t\t\t菜名\t\t\t价钱\n");
printf("\t%d\t\t\t%s\t\t\t%.2f\n",n1->Dish_ID,n1->Dish_Name,n1->Dish_Price);
n2=(DISH *)malloc(sizeof(DISH));
n1->next=(DISH *)malloc(sizeof(DISH));
n1->next=n2;
n1=n2;
n1->next=NULL;
}
fclose(fp);
}
还请各位赐教
