day8 作业

1. 编写⼀个函数,求1+2+3+...+N

答案:

def sum_n(n):
    sum1 = 0
    for i in range(n+1):
        sum1 += i
    print(sum1)
sum_n(3)

2. 编写⼀个函数,求多个数中的最⼤值

答案:

import random
def n_num_max(n):
    num1 = []
    for i in range(n):
        num = random.randint(200,500)
        num1.append(num)
        max_num = max(num1)
    print(num1)
    print(max_num)
n_num_max(10)

3. 编写⼀个函数,实现摇⾊⼦的功能,打印n个⾊⼦的点数和

答案:

import random
def roll_the_dice(n):
    sum1 = 0
    for i in range(n):
        num = random.randint(1,6)
        sum1 += num
        print(num)
    print(sum1)
roll_the_dice(2)

4. 编写⼀个函数,交换指定字典的key和value。

答案:

例如:{'a':1, 'b':2, 'c':3} ---> {1:'a', 2:'b', 3:'c'}

def exchage_key_and_value():
    dict1 = {'a': 1, 'b': 2, 'c': 3}
    aa = list(dict1.keys())
    bb = list(dict1.values())
    print(aa)
    print(bb)
    aaaa = []
    for index in range(len(bb)):
        aaa = []
        aaa.append(bb[index])
        aaa.append(aa[index])
        aaaa.append(aaa)
    aaaa = dict(aaaa)
    print(aaaa)

5. 编写⼀个函数,三个数中的最⼤值

答案:

def max_num1_num2_num2(num1,num2,num3):
    max_num = max(num1,num2,num3)
    print(max_num)
max_num1_num2_num2(1,2,3)

6. 编写⼀个函数,提取指定字符串中的所有的字⺟,然后拼接在⼀起

后打印出来
例如:'12a&bc12d--' ---> 打印'abcd'

答案:

def find_zimu():
    import string
    import random
    a =""
    for i in range(6):
        str1 = string.ascii_letters
        str11 = random.choice(str1)
        a += str11
        num = random.randint(20, 50)
        a += str(num)
    new_str = a
    print(a)
    new_new_str = ' '
    for item in new_str:
        if item.isalpha():
            new_new_str += item
    print(new_new_str)
find_zimu()

7. 写⼀个函数,求多个数的平均值

答案:

n = int(input("你想求几个数的平均值:"))
import random
def many_num_sum(n):
    a = []
    for i in range(n):
        b = random.randint(1,1000)
        a.append(b)
    print(a)
    print(sum(a)/len(a))
many_num_sum(n)

8. 写⼀个函数,默认求10的阶层,也可以求其他数的阶层

答案:

def random_num_jiecheng(num):
    print(num)
    cj = 1
    for i in range(1,num+1):
        cj *= i
    print(cj)
import random
random_num_jiecheng(num = random.randint(1,10))

9. 写⼀个函数,可以对多个数进⾏不同的运算

例如:
operation('+', 1, 2, 3) ---> 求 1+2+3的结果
operation('-', 10, 9) ---> 求 10-9的结果
operation('', 2, 4, 8, 10) ---> 求 24810的结构

答案:

def differernt_function():
    sum = 0
    for i in range(0,11):
        sum += i
    print("和为",sum)
    num1 = int(input("输入被减数:"))
    num2 = int(input("请输入减数:"))
    cha = num1 - num2
    print("差",cha)
    cj = 1
    for j in range(0,11,2):
        cj *= j
    print("偶数乘积",cj)
differernt_function()

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