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115 lines
3.4 KiB
Python
115 lines
3.4 KiB
Python
"""
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Dice
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From: BASIC Computer Games (1978)
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Edited by David H. Ahl
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"Not exactly a game, this program simulates rolling
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a pair of dice a large number of times and prints out
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the frequency distribution. You simply input the
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number of rolls. It is interesting to see how many
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rolls are necessary to approach the theoretical
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distribution:
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2 1/36 2.7777...%
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3 2/36 5.5555...%
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4 3/36 8.3333...%
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etc.
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"Daniel Freidus wrote this program while in the
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seventh grade at Harrison Jr-Sr High School,
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Harrison, New York."
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Python port by Jeff Jetton, 2019
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"""
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import random
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def main() -> None:
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# We'll track counts of roll outcomes in a 13-element list.
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# The first two indices (0 & 1) are ignored, leaving just
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# the indices that match the roll values (2 through 12).
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freq = [0] * 13
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# Display intro text
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print("\n Dice")
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print("Creative Computing Morristown, New Jersey")
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print("\n\n")
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# "Danny Freidus"
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print("This program simulates the rolling of a")
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print("pair of dice.")
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print("You enter the number of times you want the computer to")
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print("'roll' the dice. Watch out, very large numbers take")
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print("a long time. In particular, numbers over 5000.")
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still_playing = True
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while still_playing:
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print()
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n = int(input("How many rolls? "))
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# Roll the dice n times
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for _ in range(n):
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die1 = random.randint(1, 6)
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die2 = random.randint(1, 6)
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roll_total = die1 + die2
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freq[roll_total] += 1
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# Display final results
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print("\nTotal Spots Number of Times")
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for i in range(2, 13):
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print(" %-14d%d" % (i, freq[i]))
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# Keep playing?
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print()
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response = input("Try again? ")
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if len(response) > 0 and response.upper()[0] == "Y":
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# Clear out the frequency list
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freq = [0] * 13
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else:
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# Exit the game loop
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still_playing = False
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if __name__ == "__main__":
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main()
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########################################################
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#
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# Porting Notes
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#
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# A fairly straightforward port. The only change is
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# in the handling of the user's "try again" response.
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# The original program only continued if the user
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# entered "YES", whereas this version will continue
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# if any word starting with "Y" or "y" is given.
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#
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# The instruction text--which, like all these ports,
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# was taken verbatim from the original listing--is
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# charmingly quaint in its dire warning against
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# setting the number of rolls too high. At the time
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# of this writing, on a fairly slow computer, a
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# 5000-roll run typically clocks in at well under
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# 1/10 of a second!
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#
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#
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# Ideas for Modifications
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#
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# Have the results include a third column showing
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# the percent of rolls each count represents. Or
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# (better yet) print a low-fi bar graph using
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# rows of asterisks to represent relative values,
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# with each asterisk representing one percent,
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# for example.
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#
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# Add a column showing the theoretically expected
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# percentage, for comparison.
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#
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# Keep track of how much time the series of rolls
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# takes and add that info to the final report.
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#
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# What if three (or four, or five...) dice were
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# rolled each time?
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#
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########################################################
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