Python练习题集23题

[MARKmj]

环境基于 py3.6

print("******************************-1-*************************************")
# todo 1.#输入a,b,c,d4个整数，计算a+b-c*d的结果
print('Please input four number , and use "enter" key to  finish every number ! ')
a = eval(input('a = '))
b = eval(input('b = '))
c = eval(input('c = '))
d = eval(input('d = '))

print("a + b - c * d = %d"%(a + b - c * d))

# 输出结果：
# Please input four number , and use "enter" key to  finish every number !
# a = 5
# b = 6
# c = 5
# d = 2
# a + b - c * d = 1


print("******************************-2-*************************************")
# todo 2.计算一个12.5m16.7m的矩形房间的面积和周长

length = eval(input("Please input length of the room:"))
width = eval(input("Please input width of the room:"))
area = length * width
perimeter = 2 * (length + width)
print("The room's area is %.2f and perimeter is %.2f"%(area,perimeter))

# 输出结果：
# Please input length of the room:12.5
# Please input width of the room:16.7
# The room's area is 208.75 and perimeter is 58.40

print("******************************-3-*************************************")
# todo 3.怎么得到9/2的小数结果
print(9/2)
# 输出结果：
# 4.5

print("******************************-4-*************************************")
# todo 4.python计算中7*7*7*7可以有多少种写法
# 第一种：
print(7*7*7*7)
# 第二种：
print(7**4)
# 第三种：
print(pow(7,4))  #pow() 方法返回 x^y（x的y次方） 的值
# 第四种：
print(eval("pow(7,4)")) #eval() 函数用来执行一个字符串表达式，并返回表达式的值。
# 第五种：
a = 1
for i in range(4): a = a *7
print(a)
# 第六种：
print(eval(("*7"*4)[1:]))  # (*7*7*7*7)[1:] == (7*7*7*7)
# 第七种：
print(eval("*".join(['7']*4)))

# 输出结果：
# 2401
# 2401
# 2401
# 2401
# 2401
# 2401
# 2401

print("******************************-5-*************************************")
# todo 5.写程序将温度从华氏温度转换为摄氏温度。转换公式为C=5/9*(F-32)
F = eval(input("Please input Fahrenheit temperature:"))
C = 5/9*(F-32)
print("Corresponding centigrade temperature is %.2f"%C)

# 输出结果：
# Please input Fahrenheit temperature:33
# Corresponding centigrade temperature is 0.56

print("******************************-6-*************************************")
# todo 6.一家商场在降价促销。如果购买金额50-100元(包含50元和100元)之间，会给10%的折扣，如果购买金额大于100元会给20%折扣。
# todo 编写一程序，询问购买价格，再显示出折扣（%10或20%）和最终价格
customer_price = eval(input("Please input the price:"))
if customer_price <= 50 and customer_price >= 0:
    print("No discount,and your final price is $%.2f. "%(customer_price))
elif customer_price <= 100 and customer_price > 50:
    print("Discount 10%% and your final price is $ %.2f. "%(customer_price*0.9))
elif customer_price > 100:
    print("Discount 20%% and your final price is $ %.2f. "%(customer_price*0.8))

# 输出结果：
# Please input the price:56
# Discount 10% and your final price is $ 50.40.

print("******************************-7-*************************************")
# todo 7.判断一个数n能同时被3和5整除
n = eval(input('Please input a number:'))
if n % 3 == 0 and n % 5 ==0:
    print('The number can be divided by 3 and 5!')
else:
    print('The number cannot be divided by 3 and 5!')

# 输出结果：
# Please input a number:6
# The number cannot be divided by 3 and 5!

# Please input a number:15
# The number can be divided by 3 and 5!

[MARKmj]

print("******************************-8-*************************************")
# todo 8.求1+2+3+...+100
# 第一种：
sum1 = 0
for i in range(101):
    sum1 += i
print(sum1)
# 第二种：
# print(1+2+3+4+...+100)
# 第三种：
i = 1
sum2 = 0
while i <= 100:
    sum2 += i
    i += 1
print(sum2)
# 第四种：
from functools import reduce
print(reduce(lambda x,y:x+y,range(1,101)))
# reduce() 函数会对参数序列中元素进行累积。
# 函数将一个数据集合（链表，元组等）中的所有数据进行下列操作：用传给 reduce 中的函数 function（有两个参数）先对集合中的第 1、2 个元素进行操作，
# 得到的结果再与第三个数据用 function 函数运算，最后得到一个结果。

# 输出结果：
# 5050
# 5050
# 5050

print("******************************-9-*************************************")
# todo 9.交换两个变量的值
a = eval(input('Please input the first number:'))
b = eval(input('Please input the second number:'))
a,b = b,a  #可以直接交换
print('The changed first number is %d\nThe changed second number is %d'%(a,b))

# 输出结果：
# Please input the first number:6
# Please input the second number:4
# The changed first number is 4
# The changed second number is 6

print("******************************-10-*************************************")
#  todo 10.输入三个数字，以逗号隔开，输出其中最大的数
a = list(input('Please input a list of three number :'))
print(max(a))

# 输出结果：
# Please input a list of three number :4,7,3
# 7

print("******************************-11-*************************************")
#  todo 11.输入一个年份，输出是否为闰年
#闰年条件：能被4整除但不能被100整除，或者能被400整除的年份都是闰年
a = eval(input('Please input a year number :'))
if a % 4 == 0 and a % 100 != 0 or a % 400 == 0 :
    print('%d is a leap year.'%a)
else:
    print('%d is not a leap year.'%a)

# 输出结果：
# Please input a year number :2016
# 2016 is a leap year.
# Please input a year number :2018
# 2018 is not a leap year.

[MARKmj]

print("******************************-12-*************************************")
# todo 12.一个足球队在寻找年龄在10岁到12岁的小女孩（包括10岁和12岁）加入。
# todo 编写一个程序，询问用户的性别（m表示男性，f表示女性）和年龄，
# todo 然后显示一条消息指出这个人是否可以加入球队，询问10次后，输出满足条件的总人数。
sum = 0
for i in range(10):
    print('***********************第%d次***************************'%(i+1))
    gender = input("Please input a player's gender (m:male ; f:female):")
    age = eval(input("Please input a player's age :"))
    if gender == 'f' and age<=12 and age >=10:
        print('Congratulations,these gay can join the team!')
        sum += 1
    else:
        print('Sorry,these gay cannot join the team!')

print('*********************** Result ***************************')
print("In these ten gays, %d can join in all!"%sum)

# 输出结果：
# ***********************第1次***************************
# Please input a player's gender (m:male ; f:female):m
# Please input a player's age :11
# Sorry,these gay cannot join the team!
# ***********************第2次***************************
# Please input a player's gender (m:male ; f:female):m
# Please input a player's age :12
# Sorry,these gay cannot join the team!
# ***********************第3次***************************
# Please input a player's gender (m:male ; f:female):f
# Please input a player's age :15
# Sorry,these gay cannot join the team!
# ***********************第4次***************************
# Please input a player's gender (m:male ; f:female):f
# Please input a player's age :11
# Congratulations,these gay can join the team!
# ***********************第5次***************************
# Please input a player's gender (m:male ; f:female):f
# Please input a player's age :10
# Congratulations,these gay can join the team!
# ***********************第6次***************************
# Please input a player's gender (m:male ; f:female):f
# Please input a player's age :12
# Congratulations,these gay can join the team!
# ***********************第7次***************************
# Please input a player's gender (m:male ; f:female):m
# Please input a player's age :15
# Sorry,these gay cannot join the team!
# ***********************第8次***************************
# Please input a player's gender (m:male ; f:female):m
# Please input a player's age :16
# Sorry,these gay cannot join the team!
# ***********************第9次***************************
# Please input a player's gender (m:male ; f:female):f
# Please input a player's age :19
# Sorry,these gay cannot join the team!
# ***********************第10次***************************
# Please input a player's gender (m:male ; f:female):f
# Please input a player's age :10
# Congratulations,these gay can join the team!
# *********************** Result ***************************
# In these ten gays, 4 can join in all!

print("******************************-13-*************************************")
# todo 13.输入1-127的ASCII码并输出对应的字符
while 1:
    a = eval(input('Please input a ASCTT of 1-127:'))
    print(chr(a))

# 输出结果：
# Please input a ASCTT of 1-127:56
# 8
# Please input a ASCTT of 1-127:59
# ;
# Please input a ASCTT of 1-127:120
# x
# Please input a ASCTT of 1-127:67
# C
# Please input a ASCTT of 1-127:65
# A

print("******************************-14-*************************************")
# todo 14.3个人在餐厅吃饭，想分摊饭费。总共花费35.27美元，他们还想给15%的消费。
# todo 每个人该怎么付钱?
print('Everyone should pay $%.2f for the meal .'%(35.27*1.15/3))

# 输出结果：
# Everyone should pay $13.52 for the meal .

print("******************************-15-*************************************")
# todo 15.输入一周有几天，一天有几个小时，一小时有几分钟，一分钟有多少秒
# todo 输出：一周有多少分钟，多少秒
day = eval(input('The days of a week:'))
hour = eval(input('The hours of a day:'))
minute = eval(input('The minutes of an hour:'))
second = eval(input('The seconds of a minutes:'))

print('A week has %d minutes'%(day*hour*minute))
print('A week has %d seconds'%(day*hour*minute*second))

# 输出结果：
# The days of a week:7
# The hours of a day:24
# The minutes of an hour:60
# The seconds of a minutes:60
# A week has 10080 minutes
# A week has 604800 seconds

print("******************************-16-*************************************")
# todo 16、猜数小练习:
# todo 生成随机整数，从1-5取出来，然后输入一个数字，来猜，
# todo 如果大于，则打印bigger；小了，则打印less；如果相等，则打印equal
import random
a = random.randint(1,5)
# random() 方法返回随机生成的一个实数，它在[0,1)范围内。
# random.randint(1,5) 产生 1 到 5 的一个整数型随机数
# random.uniform(1.1,5.4) 产生  1.1 到 5.4 之间的随机浮点数，区间可以不是整数
# random.choice('tomorrow') 从序列中随机选取一个元素
# random.randrange(1,100,2) 生成从1到100的间隔为2的随机整数
i = 0
while 1 :
    guess = eval(input('Please guess a integer range 1-5:'))
    if guess == a:
        print('Equal.Congratulations,you are right!')
        break
    elif guess < a:
        print('Less,please guess again.')
    else:
        print('Bigger,please guess again. ')
    i += 1
print('You guessed %d times !'%i)

# 输出结果：
# Please guess a integer range 1-5:4
# Bigger,please guess again.
# Please guess a integer range 1-5:3
# Equal.Congratulations,you are right!
# You guessed 1 times !

print("******************************-17-*************************************")
# todo 17、打印10到1的数字：
for i in range(10,0,-1):
    print(i)

# 输出结果：
# 10
# 9
# 8
# 7
# 6
# 5
# 4
# 3
# 2
# 1

print("******************************-18-*************************************")
# todo 18、写一个列表，倒序输出，用while循环实现
a = list(input('Please input a list(divided by ","):').split(","))
b = len(a)
i = 0
print(a)
print(b)
while i < b:
    print(a[b - i - 1])
    i += 1

# 输出结果：
# Please input a list(divided by ","):one,two,three,four,five,six,seven,eight,nine,ten
# ['one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten']
# 10
# ten
# nine
# eight
# seven
# six
# five
# four
# three
# two
# one

print("******************************-19-*************************************")
# todo 19、什么是素数 , 素数：只能被1和它本身整除，这样的数称之为素数
a = eval(input('Please input a number(Bigger than zero):'))
if a == 1:
    print('%d is a prime'%a)
else:
    for i in range(2,a):
        if a % i == 0:
            print('%d is not a prime!'%a)
            break
        elif i == a-1:
            print('%d is a prime!'%a)

# 输出结果：
# Please input a number(Bigger than zero):19
# 19 is a prime!
# Please input a number(Bigger than zero):15
# 15 is not a prime!


print("******************************-20-*************************************")
# todo 20.阶乘
def fact(n):
    result = 1
    for i in range(1,n+1):
        result *= i
    return result

a = eval(input('Please input a number:'))
print('The %d factorial result is %d'%(a,fact(a)))

# 输出结果：
# Please input a number:8
# The 8 factorial result is 40320

print("******************************-21-*************************************")
# todo 21.嵌套循环输出10-50中个位带有1-5的所有数字
# 方法一（不用嵌套）：
for i in range(10,51):
    if i % 10 > 0 and i %10 < 6:
        print(i)
# 方法二：
for m in range(1,5):
    for n in range(1,6):
        print(str(m)+str(n))
# 方法三：
for p in range(10,50):
    if str(p)[1] in ['1','2','3','4','5']:
        print(p)

# 输出结果：
# 11
# 12
# 13
# 14
# 15
# 21
# 22
# 23
# 24
# 25
# 31
# 32
# 33
# 34
# 35
# 41
# 42
# 43
# 44
# 45

print("******************************-22-*************************************")
# todo 22、输入1-127的ascii码并输出对应字符

for i in range(13):
    print('第%d行'%(i+1),end='')
    for j in range(10):
        a = 10*i +j
        print('\t%d:\t%s'%(a+1,chr(a+1)),end='')
    print()



print("******************************-23-*************************************")
# todo 23、求两个正整数m和n的最大公约数：
# 最大公约数（辗转相除法、欧几里得算法）：
a = eval(input('Please input the first number :'))
b = eval(input('Please input the second number :'))
i = a % b
while i != 0:
    a , b = b , i
    i = a % b
print('The result is %d'%b)

# 输出结果：
# Please input the first number :968
# Please input the second number :596
# The result is 4

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