作业练习（python)

第一题：

cel = eval(input())

fah = 9 / 5 * cel + 32

print("%.1f" % fah)

第二题：

radius, length = eval(input())

area = radius * radius * 3.14159267

volume = area * length

print("%.2f" % area)

print("%.2f" % volume)

第三题：

num = eval(input())

result = num * 0.305

print(result)

第四题：

import random

random_num = random.randint(10,99)

print(random_num)

r1 = random_num / 10

r2 = random_num % 10

user_num = eval(input())

u1 = user_num / 10

u2 = user_num % 10

if random_num == user_num:

    print(5000)

elif r1 == u1 or r2 == u2:

    print(3000)

elif r1 == u1 or r1 == u2 or r2 == u1 or r2 == u2:

    print(2000)

else:

    print("无奖励")

第五题：

nums = eval(input())

ge = nums % 10

nums  //= 10 

shi = nums % 10

nums //= 10

bai = num % 10

result = ge + shi + bai

print(result)

第六题：

minutes = eval(input())

hours = minutes // 60

days = hours // 24

years = days // 365

days = days % 365

print(years)

print(days)

第七题：

water,first,end = eval(input())

Q = water * (first - end) * 4148

print(Q)

第八题：

a, b, c, d, e, f = eval(input())

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

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

print(x)

print(y)

第九题：

x1, y1, x2, y2, x3, y3 = eval(input())

side1 = ((x1 - x2) ** 2 + (y1 - y2) ** 2) ** 0.5

side2 = ((x3 - x2) ** 2 + (y3 - y2) ** 2) ** 0.5

side3 = ((x1 - x3) ** 2 + (y1 - y3) ** 2) ** 0.5

s = (side1 + side2 + side3) / 2

area = (s * (s - side1) * (s - side2) * (s - side3)) ** 0.5

print("%.1f" % area)

第十题：

import time

print(time.time())

第十一题：

import math

a, b, c = eval(input())

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

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

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

print(A)

print(B)

print(C)

第十二题：

amount = int(input("请输入总金额："))
denominations = [100, 25, 10, 5, 1]
coin_counts = [0] * len(denominations)

for i, coin in enumerate(denominations):
    coin_counts[i] = amount // coin
    amount %= coin

print("每种硬币的个数为：", coin_counts)

第十三题：

import math

n, s = eval(input())

area =  (n * s *s) / (4 * math.tan(3.14 / n))

print(area)

第十四题：

weight = float(input("请输入体重（kg）："))

height = float(input("请输入身高（米）："))

bmi = weight / (height ** 2)

if bmi < 18.5:

    print("较轻")

elif bmi >= 18.5 and bmi < 25:

    print("标准")

elif bmi >= 25 and bmi < 30:

    print("超重")

else:

    print("肥胖")

第十五题：

year = eval(input())

if year / 4 ==0 or year / 100 != 0:

    print("yes")

elif year / 400 == 0:

    print("yes")

else:

    print("no")

第十六题：

import random

random_num = random.randint(10,99)

print(random_num)

r1 = random_num / 10

r2 = random_num % 10

user_num = eval(input())

u1 = user_num / 10

u2 = user_num % 10

if random_num == user_num:

    print(5000)

elif r1 == u1 or r2 == u2:

    print(3000)

elif r1 == u1 or r1 == u2 or r2 == u1 or r2 == u2:

    print(2000)

else:

    print("无奖励")

第十七题：

a, b, c = eval(input())

delt = b ** 2 - 4 * a * c

if delt > 0:

x1 = (-b + delt ** 0.5) / (2 * a)

x2 = (-b - delt ** 0.5) / (2 * a)

print(x1)

print(x2)

elif delt == 0:

x = -b / (2 * a)

print(x)

else:

print("无实数解")

第十八题：

a, b, c, d, e, f = eval(input())

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

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

print(x)

print(y)

第二十题：
year = int(input("请输入年份："))
month = int(input("请输入月份："))
day = int(input("请输入日期："))
days_in_month = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
if year % 400 == 0 or (year % 4 == 0 and year % 100 != 0):
    days_in_month[2] = 29

day_of_year = sum(days_in_month[:month]) + day

print("今天是今年的第{}天。".format(day_of_year))
 

第二十一题：

while True:

    import random

    random_num = random.randint(0,2)

    user_num = int(input("请输入一个数字，0.石头，1.剪刀，3.布\n"))

    if random_num == 0:

        print("电脑出的是石头")

        if user_num == 0:

            print("平局")

        elif user_num == 1:

            print("你输了")

        else:

            print("你赢了")

    elif random_num == 1:

        print("电脑出的是剪刀")

        if user_num == 0:

            print("你赢了")

        elif user_num == 1:

            print("平局")

        else:

            print("你输了")

    else:

        print("电脑出的是布")

        if user_num == 0:

            print("你输了")

        elif user_num == 1:

            print("你赢了")

        else:

            print("平局")

第二十二题：

def fun1(a, b, c):

    if a + b > c and a + c > b and b + c > a:

        result = a + b + c

        print("构成三角形")

        return result

    else:

        print("此三角形不成立")
 

a, b, c = eval(input())

result1 = fun1(a, b, c)

print(result1)

第二十三题：

year, month, day = eval(input())

r = (26 * (month + 1)) // 10

k = year % 100

j = year // 100

h = int((day + r + k + (k // 4) +(j // 4) + 5 * j) % 7)

if h == 0:

    print("星期六")

elif h == 1:

    print("星期天")

elif h == 2:

    print("星期一")

elif h == 3:

    print("星期二")

elif h == 4:

    print("星期三")

elif h == 5:

    print("星期四")

elif h == 6:

    print("星期五")

else:

    print("错误")
 

第二十四题：

def fun1(num):

    num_str = str(num)

    return num_str == num_str[::-1]

user_num = input("请输入一个数字：\n")

if fun1(user_num):

    print("是回文数")

else:

    print("不是回文数")

第二十五题：

x1, y1, wight1, high1 = eval(input())

x2, y2, wight2, high2 = eval(input())

x1_min , x1_max = x1 - wight1 / 2, x1 + wight1 / 2

x2_min , x2_max = x2 - wight2 / 2, x2 + wight2 / 2

y1_min , y1_max = y1 - high1 / 2, y1 + high1 / 2

y2_min , y2_max = y2 - high2 / 2, y2 + high2 / 2

if (x1_min <= x2_max and x1_max >= x2_min and y1_min <= y2_max and y1_max >= y2_min):

    print("重叠")

elif (x1_min <= x2_min and x1_max >= x2_max and y1_min <= y2_min and y1_max >= y2_max):

    print("包含")

else:

    print("相离")

第二十六题：

def fun1(num):

    for i in range(1, num + 1): # 打印多少行，再利用最后一行的print进行换行

        for j in range(1, i+1): # 打印的是每一行的数字

            print(j, end=" ")

        print()

def fun2(num):

    for i in range(num, 0, -1): # 打印多少行

        for j in range(1, i + 1): # 内循环控制数

            print(j, end = " ")

        print()

def fun3(num):

    for i in range(1, num + 1): # 控制行数

        for _ in range(num - i): # 打印每行有多少个空格

            print(" ",end = " ")

        for j in range(i, 0, -1): # 打印数字，倒叙

            print(j, end = " ")

        print()

def fun4(num):

    for i in range(0, num):  # 打印每行

        for _ in range(i):

            print(" ", end = " ")

        for j in range(1, num - i + 1):

            print(j, end = " ")

        print()

第二十七题：

for n in range(1, 8):

    for k in range(7 - n):

        print(' ', end = " ")

    for x in range(1 - n ,n):

        print(abs(x) + 1, end = " ")

    print()

第二十八题：

for n in range(1,8):

    for k in range(7 - n):

        print("  ", end = " ")

    for x in range(1 - n, n):

        num = 2 **(n - 1 - abs(x))

        print("%2d" % (num), end = " ")

    print()

第二十九题：

rows = 5

for i in range(1, rows + 1):# 1,5

    print(" " * (rows - i) + "* " * i)

for i in range(rows - 1, 0, -1):

    print(" " * (rows - i) + "* " * i)

第三十题：

n = eval(input())

m = n // 2

for i in range(-m, m+1):

    for k in range(abs(i)):

        print(" ", end = "")

    for j in range(m+1-abs(i)):

        print("*",end = " ")

    print()