UNIX for Dummies Questions & Answers

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

int*
allocat_array(void)
{
    int *array;
    int tmp;
    int n_values = 0 ;

    array = malloc(sizeof(int));
    if(array == NULL)
        return NULL;
    while(scanf("%d",&tmp) != EOF)
    {
        array = realloc(array,sizeof(int));
        if(array == NULL)
        {
            printf ( "Out of memory\n" );
            return NULL;
        }
        n_values += 1;
        array[n_values] = tmp;
    }
    
    array[0] = n_values;
    return array;
}

void
print_array(int const *array)
{
    int i;
    printf ( "\nThere are %d values in the array\n",array[0] );
     
    for(i = 1 ; i<= array[0];i++)
        printf ( "%d\n",array[i] );
}

int
main(void)
{
    int *array;
    array = allocat_array();
    if(array == NULL)
        exit(EXIT_FAILURE);
    print_array(array);

    free(array);
    return EXIT_SUCCESS;
}