con un tipo di ritorno che è garantita essere abbastanza grande da contenere il risultato dell'aggiunta.
L'opzione facile è utilizzare un pacchetto matematico di precisione arbitrario.
L'opzione un po 'più difficile è scrivere un'aggiunta aritmetica di precisione arbitraria.
Ho un codice che utilizza un pacchetto, ma al momento non riesco a trovarlo. Aggiornerà quando lo trovo. Facile da usare.
Aggiornamento: la trovano
pacchetto chiamato gmpxx.h. (Penso spinta ha anche una classe adatta o 2)
Con uint64_t, fattoriale 93 (o forse 94?) Provoca avvolgono.
93!
1,156,772,507,081,641,574,759,205,162,306,240,436,214,753,229,576,413,535,186,142,281,213,246,807,
121,467,315,215,203,289,516,844,845,303,838,996,289,387,078,090,752,000,000,000,000,000,000,000
Con mpz_class,
1000!
402,387,260,077,093,773,543,702,433,923,003,985,719,374,864,210,714,632,543,799,910,429,938,512,398,
629,020,592,044,208,486,969,404,800,479,988,610,197,196,058,631,666,872,994,808,558,901,323,829,669,
944,590,997,424,504,087,073,759,918,823,627,727,188,732,519,779,505,950,995,276,120,874,975,462,497,
043,601,418,278,094,646,496,291,056,393,887,437,886,487,337,119,181,045,825,783,647,849,977,012,476,
632,889,835,955,735,432,513,185,323,958,463,075,557,409,114,262,417,474,349,347,553,428,646,576,611,
667,797,396,668,820,291,207,379,143,853,719,588,249,808,126,867,838,374,559,731,746,136,085,379,534,
524,221,586,593,201,928,090,878,297,308,431,392,844,403,281,231,558,611,036,976,801,357,304,216,168,
747,609,675,871,348,312,025,478,589,320,767,169,132,448,426,236,131,412,508,780,208,000,261,683,151,
027,341,827,977,704,784,635,868,170,164,365,024,153,691,398,281,264,810,213,092,761,244,896,359,928,
705,114,964,975,419,909,342,221,566,832,572,080,821,333,186,116,811,553,615,836,546,984,046,708,975,
602,900,950,537,616,475,847,728,421,889,679,646,244,945,160,765,353,408,198,901,385,442,487,984,959,
953,319,101,723,355,556,602,139,450,399,736,280,750,137,837,615,307,127,761,926,849,034,352,625,200,
015,888,535,147,331,611,702,103,968,175,921,510,907,788,019,393,178,114,194,545,257,223,865,541,461,
062,892,187,960,223,838,971,476,088,506,276,862,967,146,674,697,562,911,234,082,439,208,160,153,780,
889,893,964,518,263,243,671,616,762,179,168,909,779,911,903,754,031,274,622,289,988,005,195,444,414,
282,012,187,361,745,992,642,956,581,746,628,302,955,570,299,024,324,153,181,617,210,465,832,036,786,
906,117,260,158,783,520,751,516,284,225,540,265,170,483,304,226,143,974,286,933,061,690,897,968,482,
590,125,458,327,168,226,458,066,526,769,958,652,682,272,807,075,781,391,858,178,889,652,208,164,348,
344,825,993,266,043,367,660,176,999,612,831,860,788,386,150,279,465,955,131,156,552,036,093,988,180,
612,138,558,600,301,435,694,527,224,206,344,631,797,460,594,682,573,103,790,084,024,432,438,465,657,
245,014,402,821,885,252,470,935,190,620,929,023,136,493,273,497,565,513,958,720,559,654,228,749,774,
011,413,346,962,715,422,845,862,377,387,538,230,483,865,688,976,461,927,383,814,900,140,767,310,446,
640,259,899,490,222,221,765,904,339,901,886,018,566,526,485,061,799,702,356,193,897,017,860,040,811,
889,729,918,311,021,171,229,845,901,641,921,068,884,387,121,855,646,124,960,798,722,908,519,296,819,
372,388,642,614,839,657,382,291,123,125,024,186,649,353,143,970,137,428,531,926,649,875,337,218,940,
694,281,434,118,520,158,014,123,344,828,015,051,399,694,290,153,483,077,644,569,099,073,152,433,278,
288,269,864,602,789,864,321,139,083,506,217,095,002,597,389,863,554,277,196,742,822,248,757,586,765,
752,344,220,207,573,630,569,498,825,087,968,928,162,753,848,863,396,909,959,826,280,956,121,450,994,
871,701,244,516,461,260,379,029,309,120,889,086,942,028,510,640,182,154,399,457,156,805,941,872,748,
998,094,254,742,173,582,401,063,677,404,595,741,785,160,829,230,135,358,081,840,096,996,372,524,230,
560,855,903,700,624,271,243,416,909,004,153,690,105,933,983,835,777,939,410,970,027,753,472,000,000,
000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,
000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,
000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,
000,000,000,000,000,000
'unsigned long long int' –
@willywonka_dailyblah Certamente vero ma che sembra molto forzato. La domanda potrebbe volere che la funzione sia usata anche con i tipi di classe. – AntiElephant
prova 'sizeof'? e se è troppo breve, lancia un'eccezione. o fai un'asserzione statica: http://stackoverflow.com/questions/174356/ways-to-assert-expressions-at-build-time-in-c/174441#174441 –