链栈基本操作

#include<stdio.h>
#include<stdlib.h>
//#define NULL 0
#define  MAXSIZE  1024            /*顺序表可能的最大长度，假设为1024 */
typedef  int  elemtype;            /*elemtype可为任意类型，假设为int型 */
typedef  struct  LinkedStackNode
{    
    elemtype  data;    /*定义顺序表为一维数组*/
    struct LinkedStackNode * next;                    
}LinkedStackNode,*LinkedStack;
LinkedStack top;
LinkedStack Init_LinkedStack();
int LinkedStack_Empty(LinkedStack top);
int Push_LinkedStack(LinkedStack top,elemtype x);
int Pop_LinkedStack(LinkedStack top,elemtype * x);
int GetTop_LinkedStack(LinkedStack top,elemtype * x);
void shuchu(LinkedStack top);
void menu();
int main()
{
    char cmd;
    int n,m,len,isdo;
    LinkedStack top;
    elemtype x;
    system("cls");
    menu();
    while((cmd=getchar())!='#')
    {    switch(cmd)
        {    case '1':    top=Init_LinkedStack();
                        if(top==NULL)
                        {
                            printf("申请链栈内存空间失败，程序结束");
                            return 0;        
                        }
                        printf("
Creatied the list!
");
                        printf("


			");
                        break;
            case '2':
                        printf("输入链栈元素:
");
                        scanf("%d",&x);
                        while(x!=0)
                        {
                            isdo= Push_LinkedStack(top,x);
                            scanf("%d",&x);
                        }
                        if(isdo==1)
                        {
                            printf("插入成功");
                        }
                        else
                        {
                            printf("插入失败"); 
                        }
                        printf("
");
                        printf("


			");
                        break;
            case '3': 
                        isdo=Pop_LinkedStack(top,&x);
                        if(isdo==0)
                        {
                            printf("删除失败");
                        }
                        else
                        {
                            printf("删除成功");
                            printf("栈顶元素为 %4d",x); 
                        }
                        printf("


			");
                        break;
            case '4':    isdo=GetTop_LinkedStack(top,&x);
                        if(isdo==0)
                        {
                            printf("查找失败");
                        }
                        else
                        {
                            printf("查找成功");
                            printf("栈顶元素为 %4d",x); 
                        }
                        printf("


			");
                        break;            
            case '5':   printf("输出数据");
                    
                        shuchu(top);    
                        printf("


			");
                        break;
        }
        fflush(stdin);
        system("pause");
        menu();
    }
    return 0;
}
void menu()
{   system("cls");
    printf("		1-创建
");
    printf("		2-输入
");;
    printf("		3-删除栈顶元素
");
    printf("		4-查找栈顶元素
");
    printf("		5-输出
");
    printf("		#-quit
");
    printf("Please select:  ");
}
LinkedStack Init_LinkedStack()
{
    LinkedStack top=(LinkedStackNode *)malloc(sizeof(LinkedStackNode));
    if(top!=NULL)
    {    top->next=NULL;
    }
    
    return top;
}            
int Push_LinkedStack(LinkedStack top,elemtype x)
{
    LinkedStackNode *node;
    node=(LinkedStackNode *)malloc(sizeof(LinkedStackNode));
    if(node==NULL)
    {
        return 0;
     } 
     node->data=x;
     node->next=top->next;
     top->next=node;
     return 1;
}
int Pop_LinkedStack(LinkedStack top,elemtype * x)
{
    LinkedStackNode *node;
    if(top->next==NULL)
    {
        return 0;
    }
    else
    {
        node=top->next;
        *x=node->data;
        top->next=node->next;
        free(node); 
        return 1;
    }
}
int GetTop_LinkedStack(LinkedStack top,elemtype * x)
{
    if(top->next==NULL)
    {
        return 0;
    }
    else
    {
        *x=top->next->data;
        return 1;
    }
}
void shuchu(LinkedStack top)    
{    
     LinkedStackNode *p;
    printf("链栈中的元素:");
    for(p=top->next;p!=NULL;p=p->next)
    {
        printf("%4d",p->data);
    }
}