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2638 - eval exp
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==Rezolvare== <syntaxhighlight lang="python" line="1" start="1"> def verificare_restrictii(expresia): # functia de verificare a datelor de intrare if len(expresia) <= 50 and all(c.isdigit() or c in ['+', '-', '*'] for c in expresia): return True else: return False def evalueaza_expresia(expresia): try: # Folosim functia eval() pentru a evalua expresia rezultat = eval(expresia) # Verificam daca rezultatul se incadreaza in tipul de date long long if -9223372036854775808 <= rezultat <= 9223372036854775807: # Returnam rezultatul return rezultat else: return "Datele de intrare nu corespund restrictiilor impuse." except Exception as excep: # Daca apare o eroare, o returnam return str(excep) if __name__ == '__main__': try: # Citim expresia de la tastatura expresie = input("Introduceti expresia: ") if verificare_restrictii(expresie): # verificam datele de intrare print("Datele de intrare corespund restrictiilor impuse.") # Apelam functia pentru a evalua expresia si afisam rezultatul print("Rezultatul este: ", evalueaza_expresia(expresie)) else: print("Datele de intrare nu corespund restrictiilor impuse.") # ne asteptam la o eroare din cauza datelor de intrare, o tratam corespunzator except Exception as e: print("A aparut o eroare: ", str(e)) </syntaxhighlight>
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