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72 lines
1.9 KiB
72 lines
1.9 KiB
# Pas de documentation !!
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# Dans npi2tree :
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# il est très étrange que tu penses bien à faire attentionà l'ordre des
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# opérandes gauche est droit alors que tu ne gères que le + et le * pour
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# lesquels ça ne change rien!
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# il faudrait aussi gérer les erreurs (par exemple 2 3 5 +)
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# Note : 8.5 / 10
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import tkinter as tk
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class Expression:
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def __init__(self, root, left, right):
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self.root = root
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self.left = left
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self.right = right
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def evaluate(self):
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if self.root == '+':
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return self.left.evaluate() + self.right.evaluate()
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elif self.root == '*':
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return self.left.evaluate() * self.right.evaluate()
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else:
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return int(self.root)
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def __str__(self):
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if self.root in ['+', '*']:
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return f'({self.left} {self.root} {self.right})'
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else:
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return str(self.root)
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def npi2tree(npi_list):
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stack = []
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for item in npi_list:
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if item in ['+', '*']:
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right = stack.pop()
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left = stack.pop()
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stack.append(Expression(item, left, right))
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else:
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stack.append(Expression(item, None, None))
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return stack[0]
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def evaluate_expression():
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expression_text = entry.get()
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if expression_text:
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npi_list = expression_text.split()
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try:
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expression_tree = npi2tree(npi_list)
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result.set(expression_tree.evaluate())
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except Exception as e:
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result.set("Erreur: " + str(e))
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else:
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result.set("Veuillez entrer une expression")
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root = tk.Tk()
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root.title("Mini Calculatrice")
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expression_label = tk.Label(root, text="Expression:")
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expression_label.pack()
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entry = tk.Entry(root)
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entry.pack()
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calculate_button = tk.Button(root, text="Calculer", command=evaluate_expression)
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calculate_button.pack()
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result = tk.StringVar()
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result_label = tk.Label(root, textvariable=result)
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result_label.pack()
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root.mainloop()
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