Je suis très nouveau à Groovy. Je résous une série de Fibonacci avec ses propriétés. J'ai un code groovy comme ceci:Que signifie cette erreur de source inconnue?
a = new BigInteger[2][2]
a[0][0] = 1
a[0][1] = 1
a[1][0] = 1
a[1][1] = 0
temp = new BigInteger[2][2]
temp = a
def testFun(def a,BigInteger n) {
if(n == 1)
return a
b = new BigInteger[2][2]
def sum = 0
for (c = 0 ; c < 2 ; c++) {
for (d = 0 ; d < 2 ; d++)
{
for (k = 0 ; k < 2 ; k++)
{
sum = sum + temp[c][k] * a[k][d];
}
b[c][d] = sum
sum = 0;
}
}
testFun(b,n-1)
}
c = new BigInteger[2][2]
BigInteger n = 90
if(n % 2 == 0)
{
c = testFun(a,n.divide(2))
temp = c
c = testFun(c,2)
}
println c[0][1]
Je reçois réponse comme:
2880067194370816120
Mais quand je change de valeur n-à-dire 5090
, je reçois une grande erreur comme ceci:
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
at fibb.testFun(fibb.groovy:24)
at fibb$testFun.callCurrent(Unknown Source)
Qu'est-ce qui n'a pas fonctionné? Pourquoi je reçois cette erreur?
L'optimisation de la récursion de queue empêcherait-elle un débordement de pile ou n'est-ce pas ce qu'elle fait? –
+ 1 c'est probablement exécuté dans la console Groovy qui a des problèmes pour afficher des stacktraces massives telles que les exceptions de débordement de pile –
[@arxanas] (http://stackoverflow.com/questions/11546969/what-does-this-unknown -source-error-mean # comment15270006_11547345) Groovy ne fait pas d'élimination d'appel de queue. Il a cependant [trampolines] (http://java.dzone.com/articles/cool-stuff-groovy-18). –