大家帮我看看我的数据结构的题怎么总是出错

#include <stdio.h>

#include <stdlib.h>



/*商品属性结构体*/

typedef struct Commodity

{

	char name[10];

	long date;

}Commodity;



/*货架堆栈*/

typedef struct node

{

	Commodity sp;

	struct node *next;

}LinkStackNode, *LinkStack;



void Welcome(LinkStack *top, LinkStack *tmp);



/*初始化堆栈*/

void InitStack(LinkStack *top)

{

	*top = (LinkStack)malloc(sizeof(LinkStackNode));

	(*top) -> next = NULL;

}



/*打印货架商品货架状态*/

void State(LinkStack *top, LinkStack *tmp)

{

	int a, i = 0;

	if ((*top) -> next == NULL)

	{

		printf("商品货架无商品！退出请输入0，返回上一层请输入1：");

		scanf("%d", &a);

		switch (a)

		{

		case 0: exit(0);

		case 1: Welcome(top, tmp);

		}

	}

	else

	{

		while ((*top) -> next == NULL)

		{

			printf("%d.商品名称：%s，生产日期：%", i, (*top) -> sp.name);

			i++;

			(*top) = (*top) -> next;

		}

	}

}



/*将商品压入堆栈中*/

void Push1(LinkStack *top, LinkStack *s)

{

	(*s) -> next = (*top) -> next;

	(*top) -> next = (*s);

}



/*将商品从商品堆栈中压入临时堆栈中*/

void Push2(LinkStack *top, LinkStack *tmp)

{

	LinkStackNode *p, *q;

	p = (*top) -> next;

	q = (*tmp) -> next;

	(*top) -> next = p -> next;

	p -> next = q;

	(*tmp) -> next = p;

}



/*添加商品到商品货架上*/

void AddCommodity(LinkStack *top, LinkStack *tmp)

{

	int x = 0, i = 1;

	LinkStackNode *s;

	while (i == 1)

	{

		s = (LinkStackNode *)malloc(sizeof(LinkStackNode));

		printf("请输入商品名称：");

		scanf("%s", s -> sp.name);

		printf("请输入商品生产日期：");

		scanf("%d", &s -> sp.date);	

		if ((*top) -> next != NULL)

		{

			while (s -> sp.date > (*top) -> sp.date)

			{

				Push2(top, tmp);

			}

			Push1(top, &s);

			while ((*tmp) -> next != NULL)

			{

				Push2(tmp, top);

			}

			i = 0;

		}

		else

		{

			Push1(top, &s);

			i = 0;

		}

		printf("添加完成，是否需要继续添加？是请输入1，否则请输入0：");

		scanf("%d", &i);

	}

	printf("操作完成，退出请输入0，返回上一层请输入1：");

	scanf("%d", &x);

	if (x == 1) Welcome(top, tmp);

	else exit(0);

}



/*打印关于*/

void PrintAbout(LinkStack *top, LinkStack *tmp)

{

	int i;

	printf("计算机科学技术1003班 田世磊\n退出请输入0，返回上一层请输入1：");

	scanf("%d", &i);

	if (i == 1) Welcome(top, tmp);

	else exit(0);

}



/*打印欢迎屏幕*/

void Welcome(LinkStack *top, LinkStack *tmp)

{

	int i;

	printf("欢迎进入XXX商品管理系统，请根据下面数字提示选择进入不同功能\n1.查看货架商品状态\n2.添加商品\n3.关于\n4.退出\n请输入数字：");

	scanf("%d", &i);

	switch (i)

	{

	case 1: State(top, tmp);

	case 2: AddCommodity(top, tmp);

	case 3: PrintAbout(top, tmp);

	case 4: exit(0);

	}

}



void main()

{

	LinkStack tmp;

	InitStack(&tmp);

	LinkStack top;

	InitStack(&top);

	Welcome(&top, &tmp);

	system("PAUSE");

}