keydivision

[Flleowa]

Hello, is this parameter responsible for division in the code?

if(FLAG_DIVISOR == 0 )	{
		mpz_init_set_ui(divisor,0);
	}
	mpz_init(inversemultiplier);
	mpz_invert(inversemultiplier,divisor,EC.n);
	gmp_printf("inversemultiplier : %Zx\n",inversemultiplier);
	if(str_output)	{
		OUTPUT = fopen(str_output,"a");
		if(OUTPUT == NULL)	{
			fprintf(stderr,"can't opent file %s\n",str_output);
			OUTPUT = stdout;
		}
	}
	else	{
		OUTPUT = stdout;
	}

I just want to change it, add multiplication and subtraction. But I can’t understand what exactly is responsible for the division. When I try to add multiplication, the output is just zeros.