#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <string.h>
#define Max 3
void Push(void);
void Pop(void);
void List(void);
int top = -1;
char array[Max][20];
int main()
{
	while(1)
	{
		char option;
		printf("  Stack\n");
		printf("-------------------\n");
		printf("<1> Push\n");
		printf("<2> Pop\n");
		printf("<3> List\n");
		printf("<4> Quit\n");
		printf("-------------------\n");
		printf("Please enter your choice:");
		option = getch();
		switch(option)
		{
			case '1':
				Push();
				break;
			case '2':
				Pop();
				break;
			case '3':
				List();
				break;
			case '4':
				exit(0);
			default:
				printf("Input error!\n");
		}
	}
	return 0;
}

void Push(void)
{
	if(top >= Max - 1)
		printf("Full\n");
	else
	{
		top++;
		printf("\n\nPlease enter an item:");
		gets(array[top]);
	}
}
void Pop(void)
{
	if(top<0)
		printf("No item to stack,it's empty!\n");
	else
	{
		printf("Pop this item: %s\n",array[top]);
		top--;
	}
}
void List(void)
{
	int count = 0;
	if(top<0)
		printf("No item to stack,it's empty!\n");
	else
	{
		int i,count = 0;
		printf("stack list:\n");
		for(i = top;i >= 0;i--)
		{
			printf("%s\n",array[i]);
			count++;
			if(count % 20 ==0)
				getch();
		}
		printf("Total item is:%d\n",count);
	}
}