定义函数作业

习题1 求方程 ax^2+bx+c=0 的根

import math
def root():
    a = int(input('Enter a: '))
    b = int(input('Enter b: '))
    c = int(input('Enter c: '))
    judge = b**2-4*a*c
    r1 = (-1*b+(math.sqrt(judge)))/2*a
    r2 = (-1*b-(math.sqrt(judge)))/2*a
    if judge > 0:
        print('The roots are %s and %s'%(r1,r2))
    elif judge == 0:
        print('The roots is %s'%r1)
    else:
        print('The equation has no real roots')
root()

(base) C:\Users\Administrator>F:/install/Anaconda/python.exe d:/VScode/Untitled-Tue2.py
Enter a: 3
Enter b: 4
Enter c: 1
The roots are -3.0 and -9.0

习题2

import random
num1 = random.randint(1,100)
num2 = random.randint(1,100)
a = int(input('num1 =  '))
b = int(input('num2 =  '))
sum1 = int(input('请输入两个整数的和：'))
print(a + b)
def sum():
    sum = a+b
    if sum1 == sum:
        print('结果为真')
    else:
        print('结果为假')
sum()

(base) C:\Users\Administrator>F:/install/Anaconda/python.exe d:/VScode/Untitled-Tue2.py
num1 =  6
num2 =  8
请输入两个整数的和：23
14
结果为假

习题3

def day(a):
    if a == 0:
        print('Today is Sunday and the future day is:')
    elif a==1:
        print('Today is Monday')
    elif a==2:
        print('Today is Tuesday')
    elif a==3:
        print('Today is Wednesday')
    elif a==4:
        print('Today is Thursday')
    elif a==5:
        print('Today is Friday')   
    else:
        print('Today is Saturday') 
def time():
    a = int(input('Enter today is day：'))
    b = int(input('Enter number of days elaped since today: '))
    c = (b + a) % 7  
    print('The future day is 星期%d'% c)
    day(a)    
time()

(base) C:\Users\Administrator>F:/install/Anaconda/python.exe d:/VScode/Untitled-Tue2.py
Enter today is day：1
Enter number of days elaped since today: 2
The future day is 星期3
Today is Monday

习题4

a = [59,21,33]
a.sort()
print(a)

(base) C:\Users\Administrator>F:/install/Anaconda/python.exe d:/VScode/Untitled-Tue2.py
[21, 33, 59]

习题5

def contrast(money1,weight1,money2,weight2):
    dan1 = money1 / weight1
    dan2 = money2 / weight2
    if dan1 > dan2:
        print("第二种大米价钱更好")
    elif dan1 < dan2:
        print("第一种大米价钱更好")
    else:
        print("两种大米价格相同")

def Start():
    money1 = float(input("请输入第一种大米的价钱："))
    weight1 = float(input("请输入第一种大米的重量："))
    money2 = float(input("请输入第二种大米的价钱："))
    weight2 = float(input("请输入第二种大米的重量："))
    contrast(money1,weight1,money2,weight2)

Start()

(base) C:\Users\Administrator>F:/install/Anaconda/python.exe d:/VScode/Untitled-Tue2.py
请输入第一种大米的价钱：55
请输入第一种大米的重量：25
请输入第二种大米的价钱：25
请输入第二种大米的重量：51
第二种大米价钱更好

习题6

def day(year,month):
    days = ['null','31','29','31','30','31','30','31','31','30','31','30','31']
    sum = days[month]
    print("%d年%d月份有%s天"%(year,month,sum))

def Start():
    year = int(input("请输入年份："))
    month = int(input("请输入月份："))
    day(year,month)

Start()

(base) C:\Users\Administrator>F:/install/Anaconda/python.exe d:/VScode/Untitled-Tue2.py
请输入年份：1997
请输入月份：2
1997年2月份有29天

习题7`

import random
def pan(pao,cai):
    print("硬币弹起方向%d"%pao)
    if pao == cai:
        print("恭喜你，答对啦！")
    else:
        print("很遗憾，答错了")

def Start():
    pao = random.randint(1,2)
    cai = int(input("你猜测的结果是[1.正面 2.反面]："))
    pan(pao,cai)

Start()

(base) C:\Users\Administrator>F:/install/Anaconda/python.exe d:/VScode/Untitled-Tue2.py
你猜测的结果是[1.正面 2.反面]：1
硬币弹起方向1
恭喜你，答对啦！

习题8

def main():
    year = int(input('输入哪一年:'))
    m = int(input('输入月份:'))
    d = int(input('输入第几天:'))
    a = ['周六','周日','周一','周二','周三','周四','周五']
    if m == 1:
        m = 13
        year = year - 1
    if m ==2:
        m = 14
        year = year - 1
    h = int(d+((26*(m+1))//10)+(year%100)+((year%100)/4)+((year//100)/4)+5*year//100)%7
    day = a[h]
    print('那一天是一周中的:%s' %day)
def Start():
    main()
Start()

(base) C:\Users\Administrator>F:/install/Anaconda/python.exe d:/VScode/Untitled-Tue2.py
输入哪一年:1997
输入月份:5
输入第几天:8
那一天是一周中的:周二

习题10

def chou():
    import numpy as np
    daxiao=np.random.choice(['Ace','2','3','4','5','6','7','8','9','10','Jack','Queen','King'])
    huase=np.random.choice(['梅花','红桃','方块','黑桃'])
    print('你选择的牌是',huase,daxiao)
def Start():
    a = input("是否决定抽牌y/n:")
    if a == 'y':
        chou()
    else:
        pass
Start()

(base) C:\Users\Administrator>F:/install/Anaconda/python.exe d:/VScode/Untitled-Tue2.py
是否决定抽牌y/n:y
你选择的牌是 方块 3

习题11

def main():
    a = int(input('请输入一个正整数: '))
    b = a
    a2 = 0
    while b > 0:
        a2 *= 10
        a2 += b % 10
        b //= 10
    if a == a2:
        print('%d是回文数' % a)
    else:
        print('%d不是回文数' % a)
def start():
    main()
start()

(base) C:\Users\Administrator>F:/install/Anaconda/python.exe d:/VScode/Untitled-Tue2.py
请输入一个正整数: 5
5是回文数

习题12

def main():
    a = float(input("请输入第一条边长"))
    b = float(input("请输入第二条边长"))
    c = float(input("请输入第三条边长"))
    if a+b>c and a+c>b and b+c>a:
        L = a+b+c
        print("其周长为",L)
    else:
        print("不是三角形三条边") 
def Start():
    main()
Start()

(base) C:\Users\Administrator>F:/install/Anaconda/python.exe d:/VScode/Untitled-Tue2.py
请输入第一条边长6
请输入第二条边长5
请输入第三条边长2
其周长为 13.0