Hi,
I am not good at arithmetic but I need to calculate multiplication of big
numbers. I will try to explain my need:
For instance, if I have two 128 bit numbers represented with arrays below:
unsigned int a[4] = {100, 20, 30, 40};
unsigned int b[4] = {200, 10, 5, 120};
unsigned int c[4] = {0,0,0,0};
I want to multiply a and b, then assign the result to the c:
mpn_mul_n((mp_limb_t *)c, (const mp_limb_t *)a, (const mp_limb_t
*)b, 4);
Since mpn_mul takes result pointer as mp_limb_t type, then what if result
exceeds? I mean the result of two integer multiplication probably exceeds
integer size. Is there any example for multiplication of big numbers? I
tried mpn_mul_n() as above and used mpn_get_str to see the result but I
guess I could not use correctly.
Kind regards,
Thanks
--
MahmutG
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