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 product(x,y): return x * y
(b)
>>> print product(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 -*- def F_to_C(F): print u"%s℉等于%f℃" % (F,(float(F) - 32) * 5 / 9)
11.(1)
#取偶数 for i in range(0,21): if i % 2 == 0: print i, print #取奇数 for i in range(0,21): if i % 2 == 1: 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)
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 = 1 * (1 + per_day_rate) ** 365 - 1 print u"年回报率为：",interest * 100,"%" Annual_return_rate(0.5)
15.
# -*- coding:utf-8 -*- def greatest_common_divisor(x,y): divisor = max(x,y) while divisor >= 1: if x % divisor != 0 or y % divisor != 0: divisor -= 1 else: print u"%d和%d的最大公约数是%d。" % (x,y,divisor) break 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.略
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)
