python核心编程-第五章-习题
1.长整型表示数的范围比整型更大。在python中，整型、长整型趋于统一，普通用户不用特别关注两者区别，仅当需引用C语言时需要特别注意。
2.操作符
(a)
def multiply(x,y): return x * y
(b)
>>> multiply(23,24) 552
3.
def result(x): if 90 <= x <= 100: return "A" elif 80 <= x <= 89: return "B" elif 70 <= x <= 79: return "C" elif 60 <= x <= 69: return "D" else: return "F"
4.
# -*- coding:utf-8 -*- def year_judge(year): if (int(year) % 4 == 0 and int(year) % 100 != 0) or int(year) % 400 == 0: return u"该年是闰年！" else: return u"该年是平年！"
5.
# -*- coding:utf-8 -*- def exchange(x): divide_25, mod_25 = divmod(x, 25)[0], divmod(x,25)[1] if mod_25 == 0: return u"%d 美分换算结果是：%d枚25美分。" % (x,divide_25) else: divide_10, mod_10 = divmod(mod_25, 10)[0], divmod(mod_25, 10)[1] if mod_10 == 0: return u"%d美分换算结果是：%d枚25美分，%d枚10美分。" % (x, divide_25, divide_10) else: divide_5, mod_5 = divmod(mod_10, 5)[0],divmod(mod_10, 5)[1] if mod_5 == 0: return u"%d美分换算结果是：%d枚25美分，%d枚10美分，%d枚5美分。" % (x,divide_25, divide_10, divide_5) else:return u"%d美分换算结果是：%d枚25美分，%d枚10美分，%d枚5美分,%d枚1美分。" % (x, divide_25, divide_10, divide_5,mod_5) def cents_exchange(x): if x < 1: x = x * 100 else: x = int(x) print exchange(x)
6.
# -*- coding:utf-8 -*-
def calculator():
global expression
expression = raw_input("请输入一个表达式，可以计算加减乘除取余和幂运算，按Q退出。".decode("utf-8").encode("gbk"))
if expression == "Q":
return u"程序退出，再见"
else:
for i in ["+","-","**","/","%","*"]:
if i in expression:
numbers = expression.split(i)
if "." in expression:
N1 = float(numbers[0])
N2 = float(numbers[1])
else:
N1 = int(numbers[0])
N2 = int(numbers[1])
if i == "+":
return N1 + N2
elif i == "-":
return N1 - N2
elif i == "*":
return N1 * N2
elif i == "**":
return N1 ** N2
elif i == "%":
return N1 % N2
elif i == "/":
return N1 / N2
while True:
print calculator()
if expression == "Q":
break
7.
# -*- coding:utf-8 -*-
sales = float(raw_input("请输入营业额".decode("utf-8").encode("gbk")))
rate = float(raw_input("请输入税率,以两位小数表示".decode("utf-8").encode("gbk")))
print u"应缴税额为：%f 元人民币。" % (sales * rate)
8.
# -*- coding:utf-8 -*-
def geometry():
prompt = raw_input("计算正方形面积请输入1，立方体体积请输入2，圆面积请输入3，球体积请输入4".decode("utf-8").encode("gbk"))
if prompt == "1":
side = raw_input("请输入边长".decode("utf-8").encode("gbk"))
print u"该正方形的面积是：%d" % (int(side) ** 2)
elif prompt == "2":
side = raw_input("请输入边长".decode("utf-8").encode("gbk"))
print u"该正方体的体积是：%d" % (int(side) ** 3)
elif prompt == "3":
radius = raw_input("请输入半径".decode("utf-8").encode("gbk"))
print u"该圆的面积是：%s" % (float(radius) ** 2 * 3.14)
elif prompt == "4":
radius = raw_input("请输入半径".decode("utf-8").encode("gbk"))
print u"该球的体积是：%s" % (float(radius) ** 3 * 4 * 3.14 / 3)
geometry()
9.
a.进制问题 python中0开头的数字表示八进制的数字
b.56l + 78l 代表的是长整数的和
10.
# -*- coding:utf-8 -*- from __future__ import division def F_to_C(F): print u"%.2f°F等于%.2f摄氏度℃" % (F, (F - 32) * 5 / 9)
11.(1)
#Even number for i in range(0, 21): if not i % 2: print i, print #Odd number for i in range(0,21): if i % 2: print i,
(2)对2进行取余运算，余数0是偶数，否则是奇数
(3)
# -*- coding:utf-8 -*-
def judge_divide(x,y):
if x % y == 0:
print u"%d可以被%d整除！" % (x,y)
else:
print u"%d不能被%d整除！" % (x,y)
def judge():
number1 = int(raw_input("请输入第一个整数".decode("utf-8").encode("gbk")))
number2 = int(raw_input("请输入第二个整数".decode("utf-8").encode("gbk")))
if number1 < number2:
judge_divide(number2,number1)
else:
judge_divide(number1,number2)
judge()
12.
# -*- coding:utf-8 -*- import sys print sys.maxint print -sys.maxint - 1 print sys.float_info.max print sys.float_info.min print sys.long_info
13.
# -*- coding:utf-8 -*-
time = raw_input("请输入时间，英文冒号:前为小时数，英文冒号:后为分钟数".decode("utf-8").encode("gbk"))
hour = int(time.split(":")[0])
minute = int(time.split(":")[1])
print u"%d:%d等于%d分钟。" % (hour, minute,hour * 60 + minute)
14.
# -*- coding:utf-8 -*- def Annual_return_rate(rate): per_day_rate = rate / 365.0 investment = 1 interest = round(1 * (1 + per_day_rate) ** 365 - 1, 4) print u"年回报率为: ",interest * 100,"%"
15.
# -*- coding:utf-8 -*- def greatest_common_divisor(x, y): divisor = min(x, y) while divisor >= 1: if not x % divisor and not y % divisor: print u"%d和%d的最大公约数是%d。" % (x, y, divisor) break else: divisor -= 1 def least_common_multiple(x, y): multiple = max(x, y) while multiple <= x * y: if multiple % x == 0 and multiple % y == 0: print u"%d和%d的最小公倍数是%d。" % (x, y, multiple) break else: multiple += 1
16.
# -*- coding:utf-8 -*- def Payment(balance = 100, monthly_payment = 16.13): month, remain = divmod(balance, monthly_payment) print "\t\tAmount Remaining" print "pymt#\t", "Paid\t", "Balance" print "-" * 5, "\t", "-" * 5, "\t", "-" * 8 print "0\t$%.2f\t$%.2f" % (0.00, balance) for i in range(1, int(month+1)): print i, "\t$%.2f\t$%.2f" % (round(monthly_payment, 2), round(balance - monthly_payment * i, 2)) print "%d\t$%.2f\t$0.00" % (month + 1,remain)
17.
# -*- coding:utf-8 -*- import random N = random.randint(2,100) i = 1 random_list1 = [] while i <= N: random_list1.append(random.randint(0,2 ** 31 - 1)) i += 1 h = 1 N2 = random.randint(1,100) random_list2 = [] while h <= N2: random_list2.append(random.choice(random_list1)) h += 1 print sorted(random_list2)