Re: display output larger than 65536

From:
Vincenzo Mercuri <nomail@yahoo.it>
Newsgroups:
comp.lang.c++
Date:
Wed, 17 Dec 2014 22:44:42 +0100
Message-ID:
<O6WdnQi2IfPaZAzJnZ2dnUU7-QmdnZ2d@giganews.com>
Il 16/12/2014 22:34, itoneymathew@gmail.com ha scritto:

I can't get rice to display larger than 65,536. See:

vector <int> squares;

int main()
{
    signed long long int rice = 1;
    for (int i = 0; i < 15; ++i)
    {
        squares.push_back(rice);
        cout << squares[i] << endl;
        if (rice == 1)
            rice = 2;
        else
            rice = rice * rice;
    }
}


Boost.Multiprecision provides the header-only type 'cpp_int'
for multiprecision integers:

#include <iostream>
#include <vector>
#include <boost/multiprecision/cpp_int.hpp>

using namespace boost::multiprecision;

std::vector<cpp_int> squares;

int main()
{
         cpp_int rice = 1;
         for(int i = 0; i < 15; ++i)
         {
                 squares.push_back(rice);
                 std::cout << squares[i] << std::endl;
                 if(rice == 1)
                         rice = 2;
                 else
                         rice *= rice;
         }
}

(sorry, I didn't wrap the output lines on purpose)

$./main
1
2
4
16
256
65536
4294967296
18446744073709551616
340282366920938463463374607431768211456
115792089237316195423570985008687907853269984665640564039457584007913129639936
13407807929942597099574024998205846127479365820592393377723561443721764030073546976801874298166903427690031858186486050853753882811946569946433649006084096
179769313486231590772930519078902473361797697894230657273430081157732675805500963132708477322407536021120113879871393357658789768814416622492847430639474124377767893424865485276302219601246094119453082952085005768838150682342462881473913110540827237163350510684586298239947245938479716304835356329624224137216
32317006071311007300714876688669951960444102669715484032130345427524655138867890893197201411522913463688717960921898019494119559150490921095088152386448283120630877367300996091750197750389652106796057638384067568276792218642619756161838094338476170470581645852036305042887575891541065808607552399123930385521914333389668342420684974786564569494856176035326322058077805659331026192708460314150258592864177116725943603718461857357598351152301645904403697613233287231227125684710820209725157101726931323469678542580656697935045997268352998638215525166389437335543602135433229604645318478604952148193555853611059596230656
1044388881413152506691752710716624382579964249047383780384233483283953907971557456848826811934997558340890106714439262837987573438185793607263236087851365277945956976543709998340361590134383718314428070011855946226376318839397712745672334684344586617496807908705803704071284048740118609114467977783598029006686938976881787785946905630190260940599579453432823469303026696443059025015972399867714215541693835559885291486318237914434496734087811872639496475100189041349008417061675093668333850551032972088269550769983616369411933015213796825837188091833656751221318492846368125550225998300412344784862595674492194617023806505913245610825731835380087608622102834270197698202313169017678006675195485079921636419370285375124784014907159135459982790513399611551794271106831134090584272884279791554849782954323534517065223269061394905987693002122963395687782878948440616007412945674919823050571642377154816321380631045902916136926708342856440730447899971901781465763473223850267253059899795996090799469201
774624817718449867455659250178329070473119433165550807568221846571746373296884912819520317457002440926616910874148385078411929804522981857338977648103126085903001302413467189726673216491511131602920781738033436090243804708340403154190336
1090748135619415929462984244733782862448264161996232692431832786189721331849119295216264234525201987223957291796157025273109870820177184063610979765077554799078906298842192989538609825228048205159696851613591638196771886542609324560121290553901886301017900252535799917200010079600026535836800905297805880952350501630195475653911005312364560014847426035293551245843928918752768696279344088055617515694349945406677825140814900616105920256438504578013326493565836047242407382442812245131517757519164899226365743722432277368075027627883045206501792761700945699168497257879683851737049996900961120515655050115561271491492515342105748966629547032786321505730828430221664970324396138635251626409516168005427623435996308921691446181187406395310665404885739434832877428167407495370993511868756359970390117021823616749458620969857006263612082706715408157066575137281027022310927564910276759160520878304632411049364568754920967322982459184763427383790272448438018526977764941072715611580434690827459339991961
41424274141059911742606055648376375631452761136265862838336862115799363802087853767554533678991569423443395566631507008721353547025567031200413072549583450835743965382893607708097855057891296790735278005493562156109079584517295411597292747987752773856000820411855893000477774872776185381351049384058186159865221160596030835640594182118971403786872621948149872760365361629885617482241303348543878532402475141941718301228107820972930353737280457437209522870362277636394529086980625842235514850757103961938744962986680818876966281577815307939317909314364834076173858181956300299442279075495506128881830843007964869323217915876591803556521615711540299212027615560787310793747746684152836298770869945015203123186259420308569383894465706134623670423402682110295895495119708707654618662279629453645162075650935101890602377382153953277620867697858973196633030889330466516943618507835064156833694453005143749131129883436726523859540490427345592872394952522718461740436785475461047437701976802557660588103807
7270707717942221977090385438585844095492116099852538903974655703943973086090930596963360767529964938414598185705963754561497355827813623833288906309004288017321424808663962671333528009232758350873059614118723781422101460198615747386855096896089189180441339558524822867541113212638793675567650340362970031930023397828465318547238244232028015189689660418822976000815437610652254270163595650875433851147123214227266605403581781469090806576468950587661997186505665475715792896

--
Vincenzo Mercuri

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