更新

Python-100-Days/Day01-15/Day05/chicken.py

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+"""
+
+求解《百钱百鸡》问题
+1只公鸡5元 1只母鸡3元 3只小鸡1元 用100元买100只鸡
+问公鸡 母鸡 小鸡各有多少只
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-02
+
+"""
+
+for x in range(0, 20):
+	for y in range(0, 33):
+		z = 100 - x - y
+		if 5 * x + 3 * y + z / 3 == 100:
+			print('公鸡: %d只, 母鸡: %d只, 小鸡: %d只' % (x, y, z))
+
+# 要理解程序背后的算法 - 穷举法

Python-100-Days/Day01-15/Day05/craps.py

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+"""
+
+Craps赌博游戏
+玩家摇两颗色子 如果第一次摇出7点或11点 玩家胜
+如果摇出2点 3点 12点 庄家胜 其他情况游戏继续
+玩家再次要色子 如果摇出7点 庄家胜
+如果摇出第一次摇的点数 玩家胜
+否则游戏继续 玩家继续摇色子
+玩家进入游戏时有1000元的赌注 全部输光游戏结束
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-02
+
+"""
+
+from random import randint
+
+money = 1000
+while money > 0:
+	print('你的总资产为:', money)
+	needs_go_on = False
+	while True:
+		debt = int(input('请下注: '))
+		if debt > 0 and debt <= money:
+			break
+	first = randint(1, 6) + randint(1, 6)
+	print('玩家摇出了%d点' % first)
+	if first == 7 or first == 11:
+		print('玩家胜!')
+		money += debt
+	elif first == 2 or first == 3 or first == 12:
+		print('庄家胜!')
+		money -= debt
+	else:
+		needs_go_on = True
+
+	while needs_go_on:
+		current = randint(1, 6) + randint(1, 6)
+		print('玩家摇出了%d点' % current)
+		if current == 7:
+			print('庄家胜')
+			money -= debt
+			needs_go_on = False
+		elif current == first:
+			print('玩家胜')
+			money += debt
+			needs_go_on = False
+
+print('你破产了, 游戏结束!')

Python-100-Days/Day01-15/Day05/fibonacci.py

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+"""
+
+输出斐波那契数列的前20个数
+1 1 2 3 5 8 13 21 ...
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-02
+
+"""
+
+a = 0
+b = 1
+for _ in range(20):
+	(a, b) = (b, a + b)
+	print(a, end=' ')

Python-100-Days/Day01-15/Day05/guess.py

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+"""
+
+猜数字游戏
+计算机出一个1~100之间的随机数由人来猜
+计算机根据人猜的数字分别给出提示大一点/小一点/猜对了
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-02
+
+"""
+
+import random
+
+answer = random.randint(1, 100)
+counter = 0
+while True:
+	counter += 1
+	number = int(input('请输入: '))
+	if number < answer:
+		print('大一点')
+	elif number > answer:
+		print('小一点')
+	else:
+		print('恭喜你猜对了!')
+		break
+print('你总共猜了%d次' % counter)
+if counter > 7:
+	print('你的智商余额明显不足')

Python-100-Days/Day01-15/Day05/lily.py

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+"""
+
+找出100~999之间的所有水仙花数
+水仙花数是各位立方和等于这个数本身的数
+如: 153 = 1**3 + 5**3 + 3**3
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-02
+
+"""
+
+for num in range(100, 1000):
+	low = num % 10
+	mid = num // 10 % 10
+	high = num // 100
+	if num == low ** 3 + mid ** 3 + high ** 3:
+		print(num)

Python-100-Days/Day01-15/Day05/palindrome.py

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+"""
+
+判断输入的正整数是不是回文数
+回文数是指将一个正整数从左往右排列和从右往左排列值一样的数
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-02
+
+"""
+
+num = int(input('请输入一个正整数: '))
+temp = num
+num2 = 0
+while temp > 0:
+	num2 *= 10
+	num2 += temp % 10
+	temp //= 10
+if num == num2:
+	print('%d是回文数' % num)
+else:
+	print('%d不是回文数' % num)

Python-100-Days/Day01-15/Day05/perfect.py

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+"""
+
+找出1~9999之间的所有完美数
+完美数是除自身外其他所有因子的和正好等于这个数本身的数
+例如: 6 = 1 + 2 + 3, 28 = 1 + 2 + 4 + 7 + 14
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-02
+
+"""
+import time
+import math
+
+start = time.clock()
+for num in range(1, 10000):
+	sum = 0
+	for factor in range(1, int(math.sqrt(num)) + 1):
+		if num % factor == 0:
+			sum += factor
+			if factor > 1 and num / factor != factor:
+				sum += num / factor
+	if sum == num:
+		print(num)
+end = time.clock()
+print("执行时间:", (end - start), "秒")
+
+# 通过比较上面两种不同的解决方案的执行时间 意识到优化程序的重要性

Python-100-Days/Day01-15/Day05/prime.py

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+"""
+
+输出2~99之间的素数
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-02
+
+"""
+
+import math
+
+for num in range(2, 100):
+	is_prime = True
+	for factor in range(2, int(math.sqrt(num)) + 1):
+		if num % factor == 0:
+			is_prime = False
+			break
+	if is_prime:
+		print(num, end=' ')

Python-100-Days/Day01-15/Day05/table.py

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+"""
+
+输出乘法口诀表(九九表)
+
+Version: 0.1
+Author: 骆昊
+Date: 2018-03-02
+
+"""
+
+for i in range(1, 10):
+	for j in range(1, i + 1):
+		print('%d*%d=%d' % (i, j, i * j), end='\t')
+	print()

Python-100-Days/Day01-15/Day05/总结和练习.md

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+## 总结和练习