[C]Stack

[Luc@s]

/*
### Copyright (c) 2004 Luca Francesca
### This script is provided under the terms of the GNU General Public License
### (see http://www.gnu.org/licenses/gpl.html for the full license text.)
*/
#include <stdio.h>
#include <stdlib.h>
#include "Common.h"

#define SIZE 20

typedef struct _Stack *Stack;
typedef int base_type;

struct _Stack
{
	base_type stack[SIZE];
	int sp;
};

Stack       Init(base_type val);
void        Push(Stack st, base_type val);
base_type   Pop(Stack st);
void        Delete(Stack st);

int main(int argc, char *argv[])
{
	Stack st = Init(0);
	int i = 0;
	for(i; i <= SIZE; ++i)
	{
		Push(st, i);
	}
	for(i = 0; i <= SIZE; ++i)
	{
		printf("%d\n", Pop(st));
	}
	Delete(st);
  char exit;
  scanf("%c", &exit);
  return 0;
}

Stack Init(base_type val)
{
	Stack tmp;
  tmp = malloc(sizeof(struct _Stack));
	tmp->sp = 0;
	tmp->stack[tmp->sp++] = val; 
	return tmp;
}

void Push(Stack st, base_type val)
{
	if(st->sp == SIZE)
		return;
	st->stack[st->sp++] = val;
}

base_type Pop(Stack st)
{
	if(st->sp == 0)
		return 0;
	else 
		return st->stack[--st->sp];
}

void Delete(Stack st)
{
	SAFE_DELETE(st)
}

Risolto