Stack does not work properly in Codeblocks

Question

This code below compiles both in Codeblocks and Visual Studio, but the output is different in Codeblocks. By VS I do not delete anything from the code below, just run and ready, now in Codeblocks I took out these two libraries:

#include "stdafx.h"
#include "windows.h"

and added these:

#include <stdio.h>
#include <stdlib.h>

changed the scanf_s for scanf

and compiled, compiles normally, only that the output is wrong, this in Codeblocks. In VS is quiet works normally.

I wanted to know what’s wrong with Codeblocks, I want to run with perfect output on Codeblocks.

// pilha.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "windows.h"

#define TAM_PILHA 2
#define NUM_ENTRA 5

void empilha(int *pilha, int *topo, int valor)
{
if (*topo <= TAM_PILHA)
{
    pilha[*topo] = valor;
    (*topo)++;
}
else
{
    printf("Pilha Cheia\n");
}
}

int desempilha(int *pilha, int *topo)
{
if (*topo > 0)
{
    (*topo)--;
    return pilha[*topo];
}
else
{
    printf("Pilha Vazia\n");
}
}

int main()
{
int pilha_par[TAM_PILHA], pilha_impar[TAM_PILHA], topo_par = 0, topo_impar = 0;
int i = 0, num_do_usuario = 0;
for (i = 0; i < NUM_ENTRA; i++)
{
    printf("\nEntre com um numero: ");
    scanf_s("%d", &num_do_usuario);

    if ((num_do_usuario % 2) == 0)
    {
        empilha(pilha_par, &topo_par, num_do_usuario);
    }
    else
    {
        empilha(pilha_impar, &topo_impar, num_do_usuario);
    }

}

printf("\n\nNumeros pares sao: ");
while (topo_par > 0)
{
    printf("%d ", desempilha(pilha_par, &topo_par));
}

printf("\n\nNumeros impares sao: ");
while (topo_impar > 0)
{
    printf("%d ", desempilha(pilha_impar, &topo_impar));
}

printf("\n\n");

system("pause");
return 0;
}

Wrong:

Another error scenario:

Answer 1

You’re doing the stacking wrong.

Your batteries have TAM_PILHA size, so the check when stacking should be:

if (*topo < TAM_PILHA)

instead of

if (*topo <= TAM_PILHA)

I copied your code, compiled and ran it on Windows 10. Follow the entries and outputs:

Entrances

10, 10, 15, 15, 15

Exit

Even numbers are: 10 15

Odd numbers are: 15 15 15

In another test only 4 values were read. That is, the program did not show expected results and did not have the desired behavior. Again on Windows 10.

On the other hand, in Ubuntu 16.04 the entries and the result were:

Entrances

10, 10, 15, 15, 15

Exit

Even numbers are: 10 10

Odd numbers are: 15 15 15

The result, however correct it may seem, is still wrong. Because TAM_PILHA is worth 2, that is, the stack should store only 2 elements.

Making the change listed above the program runs as expected and produces the correct results.

Ps1: I used stdlib. h and stdio. h headers.
Ps2: I compiled with GCC and ran on Windows cmd. In both codes(original and changed).
Ps3: I compiled with G++ and ran on Ubuntu bash.