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from Pile import Pile_lst
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import tkinter as tk
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class Expression:
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def __init__(self, valeur, gauche, droite):
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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 self.valeur == '+':
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return self.gauche.evalue() + self.droite.evalue()
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if self.valeur == '*':
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return self.gauche.evalue() * self.droite.evalue()
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else:
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return self.valeur
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def __str__(self):
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if self.valeur != '+' and self.valeur != '*':
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return self.valeur
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if self.valeur == '+' or self.valeur == '*':
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return "(" + str(self.gauche.__str__()) + str(self.valeur) + str(self.droite.__str__()) + ")"
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def npi2tree(exp):
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pile_npi = Pile_lst()
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lst_npi = exp.split()
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for element in lst_npi:
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if element == '+' or element == '*':
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exp_npi = Expression(element, pile_npi.depiler(), pile_npi.depiler())
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pile_npi.empiler(exp_npi)
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else:
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pile_npi.empiler(int(element))
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return pile_npi.sommet()
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