Read an array from a file until 0 is encountered

The array number of elements is unknown

The file input is: 2 3 4 5 8 0

The array will have: 2 3 4 5 8

int read(FILE *in,int a[])
{
int i = 0;
int temp; 
while(fscanf(in, "%d", &temp) != EOF)
    {
        a[i++] = temp;
    }

return i;
}

Now I've got troubles now printing it out to a file this code shows nothing:

void printingg(FILE *out,int a[],int n)
{
    int i;
    for(i=0;i<n;i++)
    {
        fprintf(out,"%d ",a[i]);
    }
}