read int bin

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#define INPUT_FILE_NAME "integers.bin"
#define OUTPUT_FILE_NAME "hex.txt"

FILE *safeOpenFile(const char *const path, const char *const mode) {
    FILE *file = NULL;
    file = fopen(path, mode);
    if (file == NULL) {
        perror("opening error!");
        exit(EXIT_FAILURE);
    }
    return file;
}

void safeCloseFile(FILE *file) {
    if (fclose(file) == EOF) {
        perror(NULL);
    }
}

int main(void) {
    FILE *fin = safeOpenFile(INPUT_FILE_NAME, "rb");
    FILE *fout = safeOpenFile(OUTPUT_FILE_NAME, "w");

    for (uint16_t aux; fread(&aux, sizeof(aux), 1, fin) == 1;) {
        fprintf(fout, "%08x\n", aux);
    }

    safeCloseFile(fin);
    safeCloseFile(fout);
    return 0;
}