chers membres

J'ai essaye de faire un programme pour calculer la valeure approximative du pi selon la methode (4-(4/3+4/5)-....).
J'ai utilise deux methodes la premiere :

Code : Sélectionner tout - Visualiser dans une fenêtre à part
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# include <conio.h>
float main (float)
			{
         float i=3.00;
         float a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15,a16,a18,a19,a20,a21,a22,a23,a24,a25,a26,a27,a28,a29,a30,a31,a32,a33,a34,a35,a36,a37,a38,a39,a40,a41,a42,a43,a44,a45,a46,a47,a48,a49,a50,a51,a52,a53,a54,a55,a56,a57,a58,a59,a60,a61,a62,a63,a64,a65,a66,a67,a68,a69,a70,a71,a72,a73,a74,a75,a76,a77,a78,a79,a80,a81,a82,a83,a84,a85,a86,a87,a88,a89,a90,a91,a92,a93,a94,a95,a96,a97,a98,a99,a100,a101,a102,a103,a104,a105,a106,a107,a108,a109,a110,a111,a112,a113,a114,a115,a116,a117,a118,a119,a120,a121,a122,a123,a124,a125,a126,a127,a128,a129,a130,a131,a132,a133,a134,a135,a136,a137,a138,a139,a140,a141,a142,a143,a144,a145,a146,a147,a148,a149,a150,a151,a152,a153,a154,a155,a156,a157,a158,a159,a160,a161,a162,a163,a164,a165,a166,a167,a168,a169,a170,a171,a172,a173,a174,a175,a176,a177,a178,a179,a180,a181,a182,a183,a184,a185,a186,a187,a188,a189,a190,a191,a192,a193,a194,a195,a196,a197,a198,a199,a200,a201,a202,a203,a204,a205,a206,a207,a208,a209,a210,a211,a212,a213,a214,a215,a216,a217,a218,a219,a220,a221,a222,a223,p;
         float a224,a225,a226,a227,a228,a229,a230,a231,a232,a233,a234,a235,a236,a237,a238,a239,a240,a241,a242,a243,a244,a245,a246,a247,a248,a249,a250,a251,a252,a253,a254,a255,a256,a257,a258,a259,a260,a261,a262,a263,a264,a265,a266,a267,a268,a269,a270,a271,a272,a273,a274,a275,a276,a277,a278,a279,a280,a281,a282,a283,a284,a285,a286,a287,a288,a289,a290,a291,a292,a293,a294,a295,a296,a297,a298,a299,a300,a301,a302,a303,a304,a305,a306,a307,a308,a309;
         a1=(4-(4/i));
         a2=(4/(i+2))-(4/(i+4));
         a3=(4/(i+6))-(4/(i+8));
         a4=(4/(i+10))-(4/(i+12));
         a5=(4/(i+14))-(4/(i+16));
         a6=(4/(i+18))-(4/(i+20));
         a7=(4/(i+22))-(4/(i+24));
         a8=(4/(i+26))-(4/(i+28));
         a9=(4/(i+30))-(4/(i+32));
         a10=(4/(i+34))-(4/(i+36));
         a11=(4/(i+38))-(4/(i+40));
         a12=(4/(i+42))-(4/(i+44));
         a13=(4/(i+46))-(4/(i+48));
         a14=(4/(i+50))-(4/(i+52));
         a15=(4/(i+54))-(4/(i+56));
         a16=(4/(i+58))-(4/(i+60));
         a18=(4/(i+62))-(4/(i+64));
         a19=(4/(i+66))-(4/(i+68));
         a20=(4/(i+70))-(4/(i+72));
         a21=(4/(i+74))-(4/(i+76));
         a22=(4/(i+78))-(4/(i+80));
         a23=(4/(i+82))-(4/(i+84));
         a24=(4/(i+86))-(4/(i+88));
         a25=(4/(i+90))-(4/(i+92));
         a26=(4/(i+94))-(4/(i+96));
         a27=(4/(i+98))-(4/(i+100));
         a28=(4/(i+102))-(4/(i+104));
         a29=(4/(i+106))-(4/(i+108));
         a30=(4/(i+110))-(4/(i+112));
         a31=(4/(i+114))-(4/(i+116));
         a32=(4/(i+118))-(4/(i+120));
         a33=(4/(i+122))-(4/(i+124));
         a34=(4/(i+126))-(4/(i+128));
         a35=(4/(i+130))-(4/(i+132));
         a36=(4/(i+134))-(4/(i+136));
         a37=(4/(i+138))-(4/(i+140));
         a38=(4/(i+142))-(4/(i+144));
         a39=(4/(i+146))-(4/(i+148));
         a40=(4/(i+150))-(4/(i+152));
         a41=(4/(i+154))-(4/(i+156));
         a42=(4/(i+158))-(4/(i+160));
         a43=(4/(i+162))-(4/(i+164));
         a44=(4/(i+166))-(4/(i+168));
         a45=(4/(i+170))-(4/(i+172));
         a46=(4/(i+174))-(4/(i+176));
         a47=(4/(i+178))-(4/(i+180));
         a48=(4/(i+182))-(4/(i+184));
         a49=(4/(i+186))-(4/(i+188));
         a50=(4/(i+190))-(4/(i+192));
         a51=(4/(i+194))-(4/(i+196));
         a52=(4/(i+198))-(4/(i+200));
         a53=(4/(i+202))-(4/(i+204));
         a54=(4/(i+206))-(4/(i+208));
         a55=(4/(i+210))-(4/(i+212));
         a56=(4/(i+214))-(4/(i+216));
         a57=(4/(i+218))-(4/(i+220));
         a58=(4/(i+222))-(4/(i+224));
         a59=(4/(i+226))-(4/(i+228));
         a60=(4/(i+230))-(4/(i+232));
         a61=(4/(i+234))-(4/(i+236));
         a62=(4/(i+238))-(4/(i+240));
         a63=(4/(i+242))-(4/(i+244));
         a64=(4/(i+246))-(4/(i+248));
         a65=(4/(i+250))-(4/(i+252));
         a66=(4/(i+254))-(4/(i+256));
         a67=(4/(i+258))-(4/(i+260));
         a68=(4/(i+262))-(4/(i+264));
         a69=(4/(i+266))-(4/(i+268));
         a70=(4/(i+270))-(4/(i+272));
         a71=(4/(i+274))-(4/(i+276));
         a72=(4/(i+278))-(4/(i+280));
         a73=(4/(i+282))-(4/(i+284));
         a74=(4/(i+286))-(4/(i+288));
         a75=(4/(i+290))-(4/(i+292));
         a76=(4/(i+294))-(4/(i+296));
         a77=(4/(i+298))-(4/(i+300));
         a78=(4/(i+302))-(4/(i+304));
         a79=(4/(i+306))-(4/(i+308));
         a80=(4/(i+310))-(4/(i+312));
         a81=(4/(i+314))-(4/(i+316));
         a82=(4/(i+318))-(4/(i+320));
         a83=(4/(i+322))-(4/(i+324));
         a84=(4/(i+326))-(4/(i+328));
         a85=(4/(i+330))-(4/(i+332));
         a86=(4/(i+334))-(4/(i+336));
         a87=(4/(i+338))-(4/(i+340));
         a88=(4/(i+342))-(4/(i+344));
         a89=(4/(i+346))-(4/(i+348));
         a90=(4/(i+350))-(4/(i+352));
         a91=(4/(i+354))-(4/(i+356));
         a92=(4/(i+358))-(4/(i+360));
         a93=(4/(i+362))-(4/(i+364));
         a94=(4/(i+366))-(4/(i+368));
         a95=(4/(i+370))-(4/(i+372));
         a96=(4/(i+374))-(4/(i+376));
         a97=(4/(i+378))-(4/(i+380));
         a98=(4/(i+382))-(4/(i+384));
         a99=(4/(i+386))-(4/(i+388));
         a100=(4/(i+390))-(4/(i+392));
         a101=(4/(i+394))-(4/(i+396));
         a102=(4/(i+398))-(4/(i+400));
         a103=(4/(i+402))-(4/(i+404));
         a104=(4/(i+406))-(4/(i+408));
         a105=(4/(i+410))-(4/(i+412));
         a106=(4/(i+414))-(4/(i+416));
         a107=(4/(i+418))-(4/(i+420));
         a108=(4/(i+422))-(4/(i+424));
         a109=(4/(i+426))-(4/(i+428));
         a110=(4/(i+430))-(4/(i+432));
         a111=(4/(i+434))-(4/(i+436));
         a112=(4/(i+438))-(4/(i+440));
         a113=(4/(i+442))-(4/(i+444));
         a114=(4/(i+446))-(4/(i+448));
         a115=(4/(i+450))-(4/(i+452));
         a116=(4/(i+454))-(4/(i+456));
         a117=(4/(i+458))-(4/(i+460));
         a118=(4/(i+462))-(4/(i+464));
         a119=(4/(i+466))-(4/(i+468));
         a120=(4/(i+470))-(4/(i+472));
         a121=(4/(i+474))-(4/(i+476));
         a122=(4/(i+478))-(4/(i+480));
         a123=(4/(i+482))-(4/(i+484));
         a124=(4/(i+486))-(4/(i+488));
         a125=(4/(i+490))-(4/(i+492));
         a126=(4/(i+494))-(4/(i+496));
         a127=(4/(i+498))-(4/(i+500));
         a128=(4/(i+502))-(4/(i+504));
         a129=(4/(i+506))-(4/(i+508));
         a130=(4/(i+510))-(4/(i+512));
         a131=(4/(i+514))-(4/(i+516));
         a132=(4/(i+518))-(4/(i+520));
         a133=(4/(i+522))-(4/(i+524));
         a134=(4/(i+526))-(4/(i+528));
         a135=(4/(i+530))-(4/(i+532));
         a136=(4/(i+534))-(4/(i+536));
         a137=(4/(i+538))-(4/(i+540));
         a138=(4/(i+542))-(4/(i+544));
         a139=(4/(i+546))-(4/(i+548));
         a140=(4/(i+550))-(4/(i+552));
         a141=(4/(i+554))-(4/(i+556));
         a142=(4/(i+558))-(4/(i+560));
         a143=(4/(i+562))-(4/(i+564));
         a144=(4/(i+566))-(4/(i+568));
         a145=(4/(i+570))-(4/(i+572));
         a146=(4/(i+574))-(4/(i+576));
         a147=(4/(i+578))-(4/(i+580));
         a148=(4/(i+582))-(4/(i+584));
         a149=(4/(i+586))-(4/(i+588));
         a150=(4/(i+590))-(4/(i+592));
         a151=(4/(i+594))-(4/(i+596));
         a152=(4/(i+598))-(4/(i+600));
         a153=(4/(i+602))-(4/(i+604));
         a154=(4/(i+606))-(4/(i+608));
         a155=(4/(i+610))-(4/(i+612));
         a156=(4/(i+614))-(4/(i+616));
         a157=(4/(i+618))-(4/(i+620));
         a158=(4/(i+622))-(4/(i+624));
         a159=(4/(i+626))-(4/(i+628));
         a160=(4/(i+630))-(4/(i+632));
         a161=(4/(i+634))-(4/(i+636));
         a162=(4/(i+638))-(4/(i+640));
         a163=(4/(i+642))-(4/(i+644));
         a164=(4/(i+646))-(4/(i+648));
         a165=(4/(i+650))-(4/(i+652));
         a166=(4/(i+654))-(4/(i+656));
         a167=(4/(i+658))-(4/(i+660));
         a168=(4/(i+662))-(4/(i+664));
         a169=(4/(i+666))-(4/(i+668));
         a170=(4/(i+670))-(4/(i+672));
         a171=(4/(i+674))-(4/(i+676));
         a172=(4/(i+678))-(4/(i+680));
         a173=(4/(i+682))-(4/(i+684));
         a174=(4/(i+686))-(4/(i+688));
         a175=(4/(i+690))-(4/(i+692));
         a176=(4/(i+694))-(4/(i+696));
         a177=(4/(i+698))-(4/(i+700));
         a178=(4/(i+702))-(4/(i+704));
         a179=(4/(i+706))-(4/(i+708));
         a180=(4/(i+710))-(4/(i+712));
         a181=(4/(i+714))-(4/(i+716));
         a182=(4/(i+718))-(4/(i+720));
         a183=(4/(i+722))-(4/(i+724));
         a184=(4/(i+726))-(4/(i+728));
         a185=(4/(i+730))-(4/(i+732));
         a186=(4/(i+734))-(4/(i+736));
         a187=(4/(i+738))-(4/(i+740));
         a188=(4/(i+742))-(4/(i+744));
         a189=(4/(i+746))-(4/(i+748));
         a190=(4/(i+750))-(4/(i+752));
         a191=(4/(i+754))-(4/(i+756));
         a192=(4/(i+758))-(4/(i+760));
         a193=(4/(i+762))-(4/(i+764));
         a194=(4/(i+766))-(4/(i+768));
         a195=(4/(i+770))-(4/(i+772));
         a196=(4/(i+774))-(4/(i+776));
         a197=(4/(i+778))-(4/(i+780));
         a198=(4/(i+782))-(4/(i+784));
         a199=(4/(i+786))-(4/(i+788));
         a200=(4/(i+790))-(4/(i+792));
         a201=(4/(i+794))-(4/(i+796));
         a202=(4/(i+798))-(4/(i+800));
         a203=(4/(i+802))-(4/(i+804));
         a204=(4/(i+806))-(4/(i+808));
         a205=(4/(i+810))-(4/(i+812));
         a206=(4/(i+814))-(4/(i+816));
         a207=(4/(i+818))-(4/(i+820));
         a208=(4/(i+822))-(4/(i+824));
         a209=(4/(i+826))-(4/(i+828));
         a210=(4/(i+830))-(4/(i+832));
         a211=(4/(i+834))-(4/(i+836));
         a212=(4/(i+838))-(4/(i+840));
         a213=(4/(i+842))-(4/(i+844));
         a214=(4/(i+846))-(4/(i+848));
         a215=(4/(i+850))-(4/(i+852));
         a216=(4/(i+854))-(4/(i+856));
         a217=(4/(i+858))-(4/(i+860));
         a218=(4/(i+862))-(4/(i+864));
         a219=(4/(i+866))-(4/(i+868));
         a220=(4/(i+870))-(4/(i+872));
         a221=(4/(i+874))-(4/(i+876));
         a222=(4/(i+878))-(4/(i+880));
         a223=(4/(i+882))-(4/(i+884));
         a224=(4/(i+886))-(4/(i+888));
         a225=(4/(i+890))-(4/(i+892));
         a226=(4/(i+894))-(4/(i+896));
         a227=(4/(i+898))-(4/(i+900));
         a228=(4/(i+902))-(4/(i+904));
         a229=(4/(i+906))-(4/(i+908));
         a230=(4/(i+910))-(4/(i+912));
         a231=(4/(i+914))-(4/(i+916));
         a232=(4/(i+918))-(4/(i+920));
         a233=(4/(i+922))-(4/(i+924));
         a234=(4/(i+926))-(4/(i+928));
         a235=(4/(i+930))-(4/(i+932));
         a236=(4/(i+934))-(4/(i+936));
         a237=(4/(i+938))-(4/(i+940));
         a238=(4/(i+942))-(4/(i+944));
         a239=(4/(i+946))-(4/(i+948));
         a240=(4/(i+950))-(4/(i+952));
         a241=(4/(i+954))-(4/(i+956));
         a242=(4/(i+958))-(4/(i+960));
         a243=(4/(i+962))-(4/(i+964));
         a244=(4/(i+966))-(4/(i+968));
         a245=(4/(i+970))-(4/(i+972));
         a246=(4/(i+974))-(4/(i+976));
         a247=(4/(i+978))-(4/(i+980));
         a248=(4/(i+982))-(4/(i+984));
         a249=(4/(i+986))-(4/(i+988));
         a250=(4/(i+990))-(4/(i+992));
         a251=(4/(i+994))-(4/(i+996));
         a252=(4/(i+998))-(4/(i+1000));
         a253=(4/(i+1002))-(4/(i+1004));
         a254=(4/(i+1006))-(4/(i+1008));
         a255=(4/(i+1010))-(4/(i+1012));
         a256=(4/(i+1014))-(4/(i+1016));
         a257=(4/(i+1018))-(4/(i+1020));
         a258=(4/(i+1022))-(4/(i+1024));
         a259=(4/(i+1026))-(4/(i+1028));
         a260=(4/(i+1030))-(4/(i+1032));
         a261=(4/(i+1034))-(4/(i+1036));
         a262=(4/(i+1038))-(4/(i+1040));
         a263=(4/(i+1042))-(4/(i+1044));
         a264=(4/(i+1046))-(4/(i+1048));
         a265=(4/(i+1050))-(4/(i+1052));
         a266=(4/(i+1054))-(4/(i+1056));
         a267=(4/(i+1058))-(4/(i+1060));
         a268=(4/(i+1062))-(4/(i+1064));
         a269=(4/(i+1066))-(4/(i+1068));
         a270=(4/(i+1070))-(4/(i+1072));
         a271=(4/(i+1074))-(4/(i+1076));
         a272=(4/(i+1078))-(4/(i+1080));
         a273=(4/(i+1082))-(4/(i+1084));
         a274=(4/(i+1086))-(4/(i+1088));
         a275=(4/(i+1090))-(4/(i+1092));
         a276=(4/(i+1094))-(4/(i+1096));
         a277=(4/(i+1098))-(4/(i+1100));
         a278=(4/(i+1102))-(4/(i+1104));
         a279=(4/(i+1106))-(4/(i+1108));
         a280=(4/(i+1110))-(4/(i+1112));
         a281=(4/(i+1114))-(4/(i+1116));
         a282=(4/(i+1118))-(4/(i+1120));
         a283=(4/(i+1122))-(4/(i+1124));
         a284=(4/(i+1126))-(4/(i+1128));
         a285=(4/(i+1130))-(4/(i+1132));
         a286=(4/(i+1134))-(4/(i+1136));
         a287=(4/(i+1138))-(4/(i+1140));
         a288=(4/(i+1142))-(4/(i+1144));
         a289=(4/(i+1146))-(4/(i+1148));
         a290=(4/(i+1150))-(4/(i+1152));
         a291=(4/(i+1154))-(4/(i+1156));
         a292=(4/(i+1158))-(4/(i+1160));
         a293=(4/(i+1162))-(4/(i+1164));
         a294=(4/(i+1166))-(4/(i+1168));
         a295=(4/(i+1170))-(4/(i+1172));
         a296=(4/(i+1174))-(4/(i+1176));
         a297=(4/(i+1178))-(4/(i+1180));
         a298=(4/(i+1182))-(4/(i+1184));
         a299=(4/(i+1186))-(4/(i+1188));
         a300=(4/(i+1190))-(4/(i+1192));
         a301=(4/(i+1194))-(4/(i+1196));
         a302=(4/(i+1198))-(4/(i+1200));
         a303=(4/(i+1202))-(4/(i+1204));
         a304=(4/(i+1206))-(4/(i+1208));
         a305=(4/(i+1210))-(4/(i+1212));
         a306=(4/(i+1214))-(4/(i+1216));
         a307=(4/(i+1218))-(4/(i+1220));
         a308=(4/(i+1222))-(4/(i+1224));
         a309=(4/(i+1226))-(4/(i+1228));
 
 
         p=a1+a2+a3+a4+a5+a6+a7+a8+a9+a10+a11+a12+a13+a14+a15+a16+a18+a19+a20+a21+a22+a23+a24+a25+a26+a27+a28+a29+a30+a31+a32+a33+a34+a35+a36+a37+a38+a39+a40+a41+a42+a43+a44+a45+a46+a47+a48+a49+a50+a51+a52+a53+a54+a55+a56+a57+a58+a59+a60+a61+a62+a63+a64+a65+a66+a67+a68+a69+a70+a71+a72+a73+a74+a75+a76+a77+a78+a79+a80+a81+a82+a83+a84+a85+a86+a87+a88+a89+a90+a91+a92+a93+a94+a95+a96+a97+a98+a99+a100+a101+a102+a103+a104+a105+a106+a107+a108+a109+a110+a111+a112+a113+a114+a115+a116+a117+a118+a119+a120+a121+a122+a123+a124+a125+a126+a127+a128+a129+a130+a131+a132+a133+a134+a135+a136+a137+a138+a139+a140+a141+a142+a143+a144+a145+a146+a147+a148+a149+a150+a151+a152+a153+a154+a155+a156+a157+a158+a159+a160+a161+a162+a163+a164+a165+a166+a167+a168+a169+a170+a171+a172+a173+a174+a175+a176+a177+a178+a179+a180+a181+a182+a183+a184+a185+a186+a187+a188+a189+a190+a191+a192+a193+a194+a195+a196+a197+a198+a199+a200+a201+a202+a203+a204+a205+a206+a207+a208+a209+a210+a211+a212+a213+a214+a215+a216+a217+a218+a219+a220+a221+a222+a223+
a224+a225+a226+a227+a228+a229+a230+a231+a232+a233+a234+a235+a236+a237+a238+a239+a240+a241+a242+a243+a244+a245+a246+a247+a248+a249+a250+a251+a252+a253+a254+a255+a256+a257+a258+a259+a260+a261+a262+a263+a264+a265+a266+a267+a268+a269+a270+a271+a272+a273+a274+a275+a276+a277+a278+a279+a280+a281+a282+a283+a284+a285+a286+a287+a288+a289+a290+a291+a292+a293+a294+a295+a296+a297+a298+a299+a300+a301+a302+a303+a304+a305+a306+a307+a308+a309;
         printf("\t the result is pi=[%f]=\t", p);
         getch();
         return p;
         }
seulement voila apres tout ce travail la valeure n'a atteind que 3.139925 donc c'est un travail vachement long et con

la seconde methode s'avere plus "logique" et surtout ca demande moins de "taff" heureusement mais je n'ai pas su comment combiner les variables pour augmenter la valeure de l'equation suivante
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a2=(4/(i+2))-(4/(i+4));
donc le second code est :

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# include <stdio.h>
# include <math.h>
# include <conio.h>
# include <stdlib.h>
float cal_funk (float);
float main (float)
{
float pi,y=0, rate;
rate=cal_funk(y);
pi=4-rate;
 
printf("the pi value is %f \t =", pi);
getch();
return pi;
 
}
float cal_funk (float) {
float nap,i=3, k=2, g=4;
nap=(4/(i+k))-(4/(i+g));
while (k!=1300 && g!=1300 && i!=1300)
{
      k=k+2;
      g=g+2;
      i=i+2;
      nap=(4/(i+k))-(4/(i+g));
      nap++ ;
 
      }
return nap;
}
ce code point de vue syntax ne contient pas d'erreur de compilation mais point de vue logique si.
le probleme se situe dans cette partie de la seconde fonction.

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{
      k=k+2;
      g=g+2;
      i=i+2;
      nap=(4/(i+k))-(4/(i+g));
      nap++ ;
 
      }
return nap;
}
le hic c'est d'augmenter la valeure de la variable nap.
avec ce code le compilateur retourn pi=2.999


bonne lecture et merci