Python 小白提交答案，有不足请老鸟们指点，谢谢~

15-8 同时投掷三个骰子：如果你同时掷三个D6骰子，可能得到的最小点数为3，而最大点数为18,。请通过可视化展示同时掷三个D6骰子的结果

"""我编了一个任意数量任意面骰子投掷结果相加的程序"""

#!/usr/bin/env python3

# -*- coding: utf-8 -*-

import pygal

from die import Die15

# 創造N個骰子實例

die_sides = [8, 8,8]

dice = []

for die_side in die_sides:

die = Die15(die_side)

dice.append(die)

roll_results = []

# 投指定次數

roll_times = 10000

for roll_num in range(roll_times):

roll_result = 0

for die in dice:

roll_result += die.roll()

roll_results.append(roll_result)

# print(results)

max_result = 0

min_result = len(dice)

for die in dice:

max_result += die.num_sides

# 統計結果

frequencies = []

for value in range(min_result, max_result + 1):

frequency = roll_results.count(value)

frequencies.append(frequency)

# print(frequencies)

# 對結果可視化

hist = pygal.Bar()

str_dice = ''

for die in dice:

str_dice = str_dice + ' D' + str(die.num_sides)

hist.title = "Result of rolling " + \

str(len(dice)) + " dice of " + str_dice + " on %d times" % roll_times

hist.x_labels = [x for x in range(min_result, max_result + 1)]

hist.x_title = "Result"

hist.y_title = "Frequency of Result"

hist.add('Die', frequencies)

hist.render_to_file('n_dice_visual.svg')

15-9 将点数相乘：同时掷两个骰子时，通常将它们的点数相加。通过可视化展示将两个骰子的点数相乘的结果

"""我编了一个任意数量任意面骰子投掷结果相乘的程序"""

#!/usr/bin/env python3

# -*- coding: utf-8 -*-

import pygal

from die import Die15

from collections import Counter

# 創造N個骰子實例

die_sides = [6, 6, 6]

dice = [Die15(die_side) for die_side in die_sides]

roll_results = []

# 投指定次數

roll_times = 10000

for roll_num in range(roll_times):

roll_result = 1

for die in dice:

roll_result *= die.roll()

roll_results.append(roll_result)

# 计算投掷结果的范围

max_result = 1

min_result = 1

for die in dice:

max_result *= die.num_sides

# 用dict統計結果

frequencies = {}

values = list(range(min_result, max_result + 1))

for value in values:

frequencies[value] = roll_results.count(value)

# 删除概率为0的结果，即删除不可能的投掷结果

del_keys = []

for k, v in frequencies.items():

if v == 0:

del_keys.append(k)

for del_key in del_keys:

del frequencies[del_key]

# 對結果可視化

hist = pygal.Bar()

str_dice = ''

for die in dice:

str_dice = str_dice + ' D' + str(die.num_sides)

hist.title = "Result of rolling " + \

str(len(dice)) + " dice of " + str_dice + " on %d times" % roll_times

hist.x_labels = [x for x in sorted(frequencies.keys())]

hist.x_title = "Result"

hist.y_title = "Frequency of Result"

hist.add('Die', frequencies.values())

hist.render_to_file('n_dice_plus_visual.svg')