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Recherche séquentielle

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This commit is contained in:
Jean-Loup Beaussart 2015-02-24 10:45:33 +01:00
parent d56c275475
commit 0484fe70de
1 changed files with 17 additions and 0 deletions
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17
S2/TP4/tp4.py
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@ -26,6 +26,23 @@ def squestion(lettre):
question(1) # Programmer recherches seq, seq triée, dicho question(1) # Programmer recherches seq, seq triée, dicho
def seq(l, a, b, x): # Jean-loup def seq(l, a, b, x): # Jean-loup
"""
Recherche séquentielle de l'élément x dans la liste l, entre les borne a et b, b étant exclu
list(x), int, int, x → (bool, int)
CU: 0 <= a < b <= len(l)
"""
assert(a >=0 and b > a and b <= len(l))
i=a
while i < b and l[i] != x:
i += 1
if i < b:
return (True, i)
else:
return (False, 0)
return None return None
def seqTrie(l, a, b, x): # Jean-loup def seqTrie(l, a, b, x): # Jean-loup