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49 lines
1.5 KiB
49 lines
1.5 KiB
#from File import File_chaine as File
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#from Pile import Pile_chaine as Pile
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class Expression:
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def __init__(self, valeur, gauche=None, droite=None):
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self.valeur = valeur
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self.gauche = gauche
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self.droite = droite
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def evalue(self):
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if isinstance(self.valeur, (int, float)):
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return self.valeur
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operateurs = {
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'+': lambda x, y: x + y,
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'*': lambda x, y: x * y,
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'/': lambda x, y: x / y if y != 0 else float('inf'),
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'-': lambda x, y: x - y
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}
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return operateurs[self.valeur](self.gauche.evalue(), self.droite.evalue())
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class Calculette:
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def __init__(self):
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pass
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def npi2tree(self, lst):
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pile = []
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for element in lst:
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if element in ['+', '-', '*', '/']:
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droite = pile.pop()
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gauche = pile.pop()
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pile.append(Expression(element, gauche, droite))
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else:
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try:
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valeur = int(element) if element.isdigit() else float(element)
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pile.append(Expression(valeur))
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except ValueError:
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return None
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return pile[0]
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def calculer(self, expression):
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try:
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elements = expression.split()
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arbre = self.npi2tree(elements)
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if arbre:
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return arbre.evalue()
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return "Expression invalide"
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except Exception as e:
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return str(e)
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