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

void function(int  *i) {
    int *_prev_int =  (int *) ((long unsigned int) i -  sizeof(int))  ;
    printf("%d\n", *_prev_int );  

    int *_next_int =  (int *) ((long unsigned int) i +  sizeof(int))  ;
    printf("%d\n", *_next_int );    
}

void main(void) 
{
    int x = 152;
    int y = 234;
    function(&y);
}