while(!feof(in)){
                    memset(block, 0, sizeof(block));     //Îáíóëÿåì áëîê
                    fread(block, sizeof(block), BLOCK_SIZE, in);
                    fwrite(block, sizeof(block), BLOCK_SIZE, out);
                    fputc('\n', in);
                    for(int i = 0; i < BLOCK_SIZE; i++)
                            printf("%c", block[i]);
                            printf("\n");
    }