31 lines
868 B
Python
31 lines
868 B
Python
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import readline
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class CollatzCalculator:
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def calculate_steps(self, n: int) -> int:
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if n <= 1:
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return 0
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steps = 0
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while n != 1:
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if n % 2 == 0:
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n //= 2
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print(f"Step #{steps + 1}: even, divide by 2 -> {n}")
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else:
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n = 3 * n + 1
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print(f"Step #{steps + 1}: odd, multiply by 3 and add 1 -> {n}")
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steps += 1
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return steps + 1
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def main():
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calculator = CollatzCalculator()
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while True:
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try:
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n = input("Please enter a whole number: ")
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print(f"Result: {calculator.calculate_steps(int(n))} steps needed to reach {n}")
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except ValueError:
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print("ERROR: integer required")
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except (EOFError, KeyboardInterrupt):
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break
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if __name__ == "__main__":
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main()
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