#include <stdio.h>
#include <stdarg.h>
#include <errno.h>

unsigned int close_files(int filesNumber, ...)
{
    va_list va;

    va_start(va, filesNumber);

    for (; filesNumber; --filesNumber)
    {
        if (fclose(va_arg(va, FILE*)) == EOF)
            return 1;
    }

    va_end(va);
    return 0;
}

int main(int argc, char**argv)
{
    FILE *one = NULL, *two = NULL, *three = NULL;
    if (!(one = fopen("one.txt", "w")) || !(two = fopen("two.txt", "w")) || !(three = fopen("three.txt", "w")))
        printf("%d", errno);

    if (close_files(3, one, two, three))
    {
        printf("%s\n", "Error of closing files");
    }
}