超市收银系统的问题
程序代码：# include <stdio.h> //头文件
# include <string.h> //字符串头文件
# include <stdlib.h>
typedef struct in
{
char id[20];//会员账号
char key[20];//会员密码
int sum;//会员积分
struct in *next;
}member;
struct im//商品信息 以下是私有成员
{
int id;//商品编号
char name[50];//商品名称
int stoct;//商品库存
}goods[1000];
member *registe(member *t);//注册；
void buy();
int main(void)
{
member *head = (member *)malloc(sizeof(member));
strcpy(head->id, "0"), strcpy(head->key, "0");//超市管理员
head->next = NULL;
int i, a, n, boo=0;
while(1)
{
printf("注册会员请按1: \n");
printf("会员直接登入请按2：\n");
printf("推出请按0： \n");
scanf("%d", &a);
if (a == 0)
break;
if (a == 1)
head = registe(head);
else if (a == 2)
boo = login(head);
if (boo)
break;
}
if (a && boo==1)
{
printf ("尊贵的会员，您登入成功！\n");
buy();
}
printf ("已经安全推出\n");
return 0;
}
member *registe(member *t)//注册
{
printf ("现在开始会员注册\n\n");
char id[20], key[20];
member *p, *q, *r;
p = t;
while(p->next) p = p->next;//寻找链表中最后一个节点
while(1)
{
printf ("请输入您注册的账号, 密码：\n");
scanf ("%s %s", id, key);
q = t;
while(q)//判断该账号是否已经被注册
{
if (strcmp (q->id, id)==0)
break;
else q = q->next;
}
if (q == NULL)//账号没有注册
{
r = (member *)malloc(sizeof(member));
r->next = NULL;
p->next = r;
strcpy (r->id, id);
strcpy (r->key, key);
r->sum = 1000;//会员默认的积分为1000；
break;
}
else
printf ("该账号已被注册，请重新输入账号，密码\n");
}
printf ("恭喜您，已经注册成功，现在可以登入了\n\n");
return t;
}
int login (member *t)//登入
{
printf ("现在开始登入");
member *p;
char id[20],key[20];
int a, boo = 0;
while (1)
{
printf ("请输入您的账号，密码: \n");
scanf ("%s", id);
if (strcmp(id, "#")==0)
break;
scanf ("%s", key);
p = t;
while (p)
{
if (strcmp(p->id, id)==0 &&strcmp(p->key, key)==0)
break;
else
p = p->next;
}
if (p == NULL)
{
printf ("对不起，该账号和密码错误，请重新登入\n");
printf ("推出登入请按#\n");
}
else if
(strcmp(id, "0")!=0)
{
boo = 1;
break;
}
}
return boo;
}
void buy()
{
char s[20];
int n;
int i;
while(1)
{
printf ("请输入商品的编号或者名称:\n");
scanf ("%s", s);
if (strcmp(s, "0")==0)
break;
if (s[0]>='1' && s[0]<='9')
{
n = atoi(s);
for (i=0; i<1000; i++)
{
if (goods[i].id == n)
break;
}
if (i > 1000)
{
printf ("商品不存在请重新输入，推出请按0\n");
}
else
{
printf ("您已购买成功。\n");
}
}
else
{
for (i=0; i<1000; i++)
{
if (strcmp(goods[i], s)==0)
break;
}
if (i > 1000)
{
printf ("商品不存在，请重新输入，推出请安0\n");
}
else
{
printf ("您购买成功.\n");
}
}
}
}
在下 小白菜， 请帮我看下代码 哪里出错了~谢谢~~~~
）
