2022-10-11 19:27:51 +00:00
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# This program should find the phase of a fictional substance
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# for given temperature and pressure conditions, but it has several bugs.
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#
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# a) Try to run the program with Python3 and see what happens.
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# There's a syntax error near the end. Fix it.
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# b) Try again. It'll crash with a runtime error. Find the cause and fix it.
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# c) There is also a semantic error: for T=300 and P=100,
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# the phase should be SOLID.
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# Fix it to agree with the phase diagram. Test in several conditions.
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# d) Adjust the format string to output the temperature with 1 decimal place
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# and the pressure with 3.
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print("Kryptonite phase classifier")
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# Input.
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T = float(input("Temperature (K)? "))
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P = float(input("Pressure (kPa)? "))
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# Determine the phase.
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if (T > 400) and (P > 50):
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phase = "LIQUID"
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2023-01-30 16:48:43 +00:00
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elif P > 0.125 * T:
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2022-10-11 19:27:51 +00:00
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phase = "SOLID"
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else:
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phase = "GAS"
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# Output.
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2023-01-30 16:48:43 +00:00
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print("At {:.1f} K and {:.3f} kPa, Kryptonite is in the {} phase.\n\n".format(T, P, phase))
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