int split_n(char *argv[], FILE *file_ptr){
    FILE *file_ptr_new;
    char name[100], buffer[100], c;
    int kol = 0;

    struct stat buf;                                     //Определение размера исходного файла
    stat(argv[1], &buf);
    long size, number_of_items_transferred = 0;
    size = buf.st_size;
    printf("Source file size: %lu\n", size);

    long new_size = 1 + size / atoi(argv[3]);       //Размер новых файлов
    printf("New file size: %lu\n", new_size);

    for (int i = 0; ; i++){
        kol = 0;

        strcpy(name, argv[5]);                   //Создание нового файла
        itoa(i, buffer, 10);
        strcat(name, buffer);
        strcat(name, ".txt");
        file_ptr_new = fopen(name, "wb");

        while (number_of_items_transferred < size){

            if (kol < new_size){
                c = getc(file_ptr);
                fputc(c, file_ptr_new);
                number_of_items_transferred++;
                kol++;
            }

            if (kol == new_size){
                fclose(file_ptr_new);
                break;
            }

            if (c == EOF){
                fclose(file_ptr_new);
                return 0;
            }
        }
        fclose(file_ptr_new);
        return 0;
   }

}