1.Demo01 摄氏温度转化为华氏温度

celsius = float(input('输入摄氏温度:'))

fahrenheit = (9/5)*celsius + 32

print('%0.1f 摄氏温度转为华氏温度为 %0.1f' % (celsius, fahrenheit))

结果: 

2.Demo02 计算圆柱体的体积

h, r =map(float, input().split())

# 计算圆柱的底面积和体积

area = 3.14 * r * r

volume = area * h

# 输出结果

print("%.2f"%area)

print("%.2f"% volume)

注意:map()函数是Python中的一个内置函数,它的功能是:将指定的函数,依次作用于可迭代对象的每个元素,并返回一个迭代器对象。这个可迭代对象,可以是一个也可以是多个。

A. map()函数实例

案例1:可迭代对象传递给map()函数,然后map()函数将这个可迭代对象传入自定义函数。

#自定义一个函数a,返回x*2的值

def a(x):

return x*2

#定义列表

lis1=[1,3,5,7,9]

#对列表中的每个数运用函数a,返回迭代器

lis1_a=map(a,lis1)

#输出迭代器中的值

for num in lis1_a:

print(num)

#输出结果

'''

2

6

10

14

18

'''

案例2:可迭代对象传递给map()函数,然后map()函数将这个可迭代对象进行数据类型转换。

#定义一个列表a

a = ['1','2','3']

#将列表中的每个字符串,转换成浮点型,并返回迭代器

b = map(float,a)

#输出迭代器中的值

for num in b:

print(num)

#输出结果

'''

1.0

2.0

3.0

'''

        第二题用的就是案例2里面的map()函数;

案例3:多个可迭代对象传递给map()函数,然后map()函数将这2个迭代对象传入自定义函数a()。注意:这个自定义函数a()的参数个数,要与传入的可迭代对象数量一致。

# 定义一个函数

# 该函数采用2参数

def a(x,y):

return x * y

# 定义列表1

lis1 = [1, 3, 5, 7, 9]

# 定义列表2

lis2 = [2, 4, 6, 8, 10]

# 将两个列表中的值,传入函数a,并返回可迭代器

lis_a = map(a, lis1, lis2)

#输出迭代器中的值

for num in lis_a:

print(num)

#输出结果

'''

2

12

30

56

90

'''

结果: 

3.Demo03 将英尺数转换为米数

feet = eval(input("Enter a value for feet:"))

meters=feet*0.305

print(feet,"feet is",meters,"meters")

结果:

4. 计算小费

tip, rate = eval(input("enter the tip and a rate:"))

rate = tip * rate / 100

total = rate + tip

print("The rate is", rate, "and the total is", total)

结果:

5.对一个整数中的各位数字求和

num = eval(input("enter a number between 0 and 1000:"))

gewei = num % 10

baiwei = num // 100

shiwei =(num - baiwei*100) // 10

print("the sum of the digits is", int(gewei+baiwei+shiwei))

 结果:

 6.计算年数和天数

minute = int(input("enter a number of minute:"))

year = minute // (24*365*60)

day = minute % (24*60*365) // (24*60)

print("the year is", year)

print("the day is", day)

结果:

 7.计算能量

M = float(input("enter a number:"))

initialTemperature = float(input("enter a number:"))

finalTemperature = float(input("enter a number:"))

Q = M * (finalTemperature - initialTemperature) * 4184

print(f"the Q is", Q)

 结果:

8.分割数字

num =input("please enter a number:")

for i in range(len(num) - 1, -1, -1):

# print(num[i],end = "\n")

print(num[i])

注意:len()函数只能用于可以迭代的对象;例如:列表list,元组tuple,字符串str,等;不能用于整数、浮点数等其他类型!

结果:

 9.计算三角形的面积

import math

x1, y1, x2, y2, x3, y3 = map(float,input("输入:\n").split())

first = math.sqrt((x1 - x2)**2 + (y1 - y2)**2)

second = math.sqrt((x1 - x3)**2 + (y1 - y3)**2)

third = math.sqrt((x2 - x3)**2 + (y2 - y3)**2)

s = (first + second + third) / 2

area = float(math.sqrt(s*(s - first)*(s - second)*(s - third)))

print("%.1f"%area)

结果:

10.显示当前时间

import time

print (time.strftime("%Y-%M-%d %A %X %Z",time.localtime(time.time())))

结果:

 

11.计算三角形的三个角

import math

x1, y1, x2, y2, x3, y3 = map(float,input("输入:").split())

a = math.sqrt((x1 - x2)**2 + (y1 - y2)**2)

b = math.sqrt((x1 - x3)**2 + (y1 - y3)**2)

c = math.sqrt((x2 - x3)**2 + (y2 - y3)**2)

A = math.degrees(math.acos((a*a - b*b - c*c)/(-2*b*c)))

B = math.degrees(math.acos((b*b-a*a-c*c)/(-2*a*c)))

C = math.degrees(math.acos((c*c-b*b-a*a)/(-2*a*b)))

print("%.2f"%A)

print("%.2f"%B)

print("%.2f"%C)

注意:math.degrees()函数是将弧度转换为角度;

结果:

 12.最小数量的硬币

money = float(input("请输入总金额:"))

a = money // 1

b = (money - a*1) // 0.25

c = (money - a*1 - b*0.25) // 0.1

d = (money - a*1 - b*0.25 - c*0.1) // 0.05

e = (money - a*1 - b*0.25 - c*0.1 - d*0.05) // 0.01

print("%d个硬币"%a)

print("%d个硬币"%b)

print("%d个硬币"%c)

print("%d个硬币"%d)

print("%d个硬币"%e)

 结果:

 13.正多边形的面积

import math

n,s = map(float,input("请输入长和宽:").split())

area = (n * s * s) / (4 * math.tan(math.pi/n))

print("%.2f"%area)

结果: 

 14.计算身体质量指数

height = float(input("请输入身高:"))

weight = float(input("请输入体重: "))

BMI = weight/(height*height)

if BMI < 18.5:

print("过轻!")

elif 18.5 <= BMI <24:

print("正常!")

elif 24 <= BMI <27:

print("过重!")

elif 27 <= BMI < 30:

print("中度肥胖!")

elif 30 <= BMI < 35:

print("中度肥胖!")

elif BMI >=35:

print("重度肥胖!")

 结果:

 15.判定闰年

year=int(input("请输入年份:"))

if year % 4 == 0 and year % 100 != 0 or year % 400 == 0:

print("该年为闰年")

else:

print("该年是平年")

结果:

 16.中彩票

import random

num = random.randint(10,100)

a = int(input("请输入一个两位数:"))

a1 = num // 10 % 10

a2 = num % 10

#是代表num随机数中的第一位和第二位!

first = a // 10 % 10

second = a % 10

print(num)

if a == num:

print("你太幸运了,奖励你10000!")

elif a1 == second and a2 == first:

print("你也不错!奖励你3000!")

elif a1 == second or a2 == first or a1 == first or a2 == second:

print("还不错!奖励你1000!")

elif a1 != second and a2 != first:

print("你与奖励擦肩而过!奖励你0元!")

17.解一元二次方程

import math

a, b, c = map(float,input("请输入三个值:").split())

r1 = (-b + math.sqrt(b * b - 4 * a * c)) / (2 * a)

r2 = (-b - math.sqrt(b * b - 4 * a * c)) / (2 * a)

if b * b - 4 * a *c > 0:

print("%.2f"%r1)

print("%.2f"%r2)

elif b * b - 4 * a * c == 0:

print("%.2f"%r1)

elif b * b - 4 * a * c < 0:

print("无实数解!")

结果:

 18.解2×2线程方程

import math

a, b, c, d, e, f = map(float,input("请输入三个值:").split())

x = (e * d - b * f) / (a * d - b * c)

y = (a * f - e * c) / (a * d - b * c)

a * x + b * y == e

c * x + d * y == f

if a * d - b * c == 0:

print("无解")

else:

print(x)

print(y)

19. 未来是周几

a, b= map(int,input("请输入今天星期几和你想要计算的日子:").split())

if a + b % 7 == 1:

print("星期一")

elif a + b % 7 == 2:

print("星期二")

elif a + b % 7 == 3:

print("星期三")

elif a + b % 7 == 4:

print("星期四")

elif a + b % 7 == 5:

print("星期五")

elif a + b % 7 == 6:

print("星期六")

elif a + b % 7 == 0:

print("星期天")

结果:

 20.本年中的第几天

year, month, day = map(int,input("输入年月日:").split())

if year % 4 == 0 and year % 100 != 0 or year % 400 == 0:

if month == 1:

day1 = day

print(day1)

elif month == 2:

day1 = 31 + day

print(day1)

elif month == 3:

day1 = 31 + 28 + day

print(day1)

elif month == 4:

day1 = 31 + 28 + 31 + day

print(day1)

elif month == 5:

day1 = 31 + 28 + 31 + 30 + day

print(day1)

elif month == 6:

day1 = 31 + 28 + 31 + 30 + 31 + day

print(day1)

elif month == 7:

day1 = 31 + 28 + 31 + 30 + 31 + 30 + day

print(day1)

elif month == 8:

day1 = 31 + 28 + 31 + 30 + 31 + 30 + 31 + day

print(day1)

elif month == 9:

day1 = 31 + 28 + 31 + 30 + 31 + 30 + 31 + 30 + day

print(day1)

elif month == 10:

day1 = 31 + 28 + 31 + 30 + 31 + 30 + 31 + 30 + 31 + day

print(day1)

elif month == 11:

day1 = 31 + 28 + 31 + 30 + 31 + 30 + 31 + 30 + 31 + 30 + day

print(day1)

elif month == 12:

day1 =31 + 28 + 31 + 30 + 31 + 30 + 31 + 30 + 31 + 30 + 31 + day

print(day1)

else:

if month == 1:

day1 = day

print(day1)

elif month == 2:

day1 = 31 + day

print(day1)

elif month == 3:

day1 = 31 + 29 + day

print(day1)

elif month == 4:

day1 = 31 + 29 + 31 + day

print(day1)

elif month== 5:

day1 = 31 + 29 + 31 + 30 + day

print(day1)

elif month == 6:

day1 = 31 + 29 + 31 + 30 + 31 + day

print(day1)

elif month== 7:

day1 = 31 + 29 + 31 + 30 + 31 + 30 + day

print(day1)

elif month == 8:

day1 = 31 + 29 + 31 + 30 + 31 + 30 + 31 + day

print(day1)

elif month == 9:

day1 = 31 + 29 + 31 + 30 + 31 + 30 + 31 + 30 + day

print(day1)

elif month == 10:

day1 = 31 + 29 + 31 + 30 + 31 + 30 + 31 + 30 + 31 + day

print(day1)

elif month == 11:

day1 = 31 + 29 + 31 + 30 + 31 + 30 + 31 + 30 + 31 + 30 + day

print(day1)

elif month == 12:

day1 = 31 + 29 + 31 + 30 + 31 + 30 + 31 + 30 + 31 + 30 + 31 + day

print(day1)

 结果:

21 剪刀石头布

 

import random

a = random.randint(0,2)

b = int(input("请输入0-2之间的整数(0代表剪刀,1代表石头,2代表步):"))

print(a)

if b > 2 or b < 0:

print("请正确输入!")

elif (a == 0 and b == 1) or (a == 1 and b == 2) or (a == 2 and b == 0):

print("姐妹真棒哦!")

elif a == b:

print("打平")

else:

print("啊偶输掉啦!没关系的,我们可以再试试!")

结果:

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