#1 ?求兩數(shù)之和
# num1 = float(input("請輸入第一個數(shù)字："))
# num2 = float(input("請輸入第二個數(shù)字："))
# sum = num1 + num2
# print("二者之和為：" + str(sum))

#2 ?求階乘
# num = int(input("請輸入需要求階乘的數(shù)字："))
# n = last_number = 1
# while last_number != num:
# ? ? n = n * (last_number + 1)
# ? ? last_number += 1
# print(f"{num}的階乘為{n}")

#3 ?輸入半徑，求圓面積
# radius = float(input("請輸入圓的半徑："))
# import math
# area = math.pi * radius ** 2
# print("圓的面積為：" + str(area))

#4 ?求兩數(shù)之間的素數(shù)
# num_first = int(input("請輸入第一個數(shù)字："))
# num_second = int(input("請輸入第二個數(shù)字："))
# num = num_first
# i = 0
# while num_first <= num <= num_second:
# ? ? for n in range(2,num):
# ? ? ? ? if num % n == 0:
# ? ? ? ? ? ? i = 1
# ? ? if num == 1 or num == 2:
# ? ? ? ? ? ? i = 0
# ? ? if i == 0:
# ? ? ? ? print(f"{num}是素數(shù)")
# ? ? i = 0
# ? ? num += 1

#5 求前N個數(shù)字的平方和
# N = int(input("請輸入數(shù)字N的值："))
# sum = 0
# for num in range(1, N + 1):
# ? ? sum += num ** 2
# print(f"平方和為：{sum}")

#6 ?計算列表數(shù)字的和
# quantity = int(input("您需要計算幾個數(shù)字之和："))
# time = 1
# numbers_list = []
# while time <= quantity:
# ? ? numbers_list.append(int(input("列表中有：")))
# ? ? time += 1
# total = 0
# for num in numbers_list: ? ? ? ? ? ? ? ? ? ? ? ? ? #sum(numbers_list)這個函數(shù)可以直接求和
# ? ? total += num
# print(f"列表數(shù)字之和為：{total}")

#7 ?計算數(shù)字范圍中的所有偶數(shù)
# def even_number(begin, end):
# ? ? begin = int(input("請輸入起始值："))
# ? ? end = int(input("請輸入結(jié)束值："))
# ? ? for num in range(begin, end + 1):
# ? ? ? ? if num % 2 == 0:
# ? ? ? ? ? ? print(num)
# begin = 0
# end = 0
# even_number(begin, end)

#8 ?從列表中移除多個元素
# def remove(list1, list2):
# ? ? for num1 in list1:
# ? ? ? ? for num2 in list2:
# ? ? ? ? ? ? if num1 == num2:
# ? ? ? ? ? ? ? ?list1.remove(num1)
# ? ? return list1
# list1 = [1, 2, 4, 5, 8]
# list2 = [2, 8]
# print(f"移除后列表變?yōu)椋?#34;, remove(list1, list2))

#9 ?對列表元素去重
# list1 = []
# list2 = []
# quantity = int(input("列表中將要被填入的元素數(shù)量："))
# for num in range(1, quantity + 1):
# ? ? list1.append(int(input("請輸入列表元素：")))
# for num1 in list1:
# ? ? if num1 not in list2:
# ? ? ? ?list2.append(num1)
# print(f"去重后為：{list2}") ? ? ? ? ? ? ? ? ? ? #set()函數(shù)無重復(fù)，可以list2位參數(shù)，set(list2)

#10 ?折線
# import turtle
# x1,y1 = 100,100
# x2,y2 = -100,100
# x3,y3 = -100,-100
# x4,y4 = 100,-100
# turtle.penup()
# turtle.goto(x1,y1)
# turtle.pendown()
# turtle.goto(x2,y2)
# turtle.goto(x3,y3)
# turtle.goto(x4,y4)
# turtle.goto(x1,y1)

#11 ?字符串倒序輸出
# string = "fuck u"
# string = string[::-1]
# print(f"倒序結(jié)果為：{string}")

#12 ?輸出所有s
# a = 'syzsyzsyzs'
# a = a[::3]
# print(f"{a}")

#13 ?橫向輸出
# num = 0
# while num <= 10:
# ? ? print(num, end = "\t")
# ? ? num += 1

#14 ?計算1到100的累加和
# sum = 0
# i = 0
# while i <= 100:
# ? ? sum += i
# ? ? i += 1
# print(sum)

#15 ?打印數(shù)字方陣
# for line in (1,2,3,4):
# ? ? for column in (1,2,3,4):
# ? ? ? ? print(column,end = "\t")
# ? ? print()

#16 ?九九乘法表
# for row_num in range(1,10):
# ? ? for line_num in range(1,row_num + 1):
# ? ? ? ? print(f"{row_num} * {line_num} = {line_num * row_num}", end = "\t")
# ? ? print()

#17 ?錄入員工薪資，打印員工數(shù)量、薪資明細(xì)及平均薪資
# staff = 0
# salary_sum = 0
# a = None
# salarys = []
# print("輸入0結(jié)束")
# while a != 0:
# ? ? staff += 1
# ? ? a = float(input(f"第{staff}位員工薪資為："))
# ? ? if a != 0:
# ? ? ? ? salary_sum += a
# ? ? ? ? salarys.append(a)
# ? ? elif a == 0:
# ? ? ? ? staff -= 1
# print("共{0}位員工，平均月收入{1}元".format(staff, salary_sum / staff))
# print(salarys)

#18 ?循環(huán)后的else
# salary_sum = 0
# salarys = []
# for x in range(4):
# ? ? a = input("請輸入四位員工的薪資（輸入Q或q結(jié)束）：")
# ? ? if a.upper() == "Q":
# ? ? ? ? print("錄入完成，退出")
# ? ? ? ? break
# ? ? if float(a) < 0:
# ? ? ? ? continue
# ? ? salarys.append(float(a))
# ? ? salary_sum += float(a)
# else:
# ? ? print("四位員工的薪資已全部錄入")
# print("錄入薪資：",salarys)
# print("平均薪資為{0}".format(salary_sum / 4))