Python练习

1.读取整数序列,找出他们中的最大值,并计算出它出现的次数

代码:

num_max = 0
num_count = 0
ls = []
while True:
    ls.append(int(input("请输入一个整数:")))
    if len(ls) == 1:
        num_max = ls[0]
        num_count = 1
    elif ls[len(ls) - 1] != 0:
        if ls[len(ls) - 1] > num_max:
            num_max = ls[len(ls) - 1]
            num_count = 1
        elif ls[len(ls) - 1] == num_max:
            i = 0
            num_count = 0
            while i < len(ls):
                if ls[i] == num_max:
                    num_count += 1
                i += 1
    elif ls[len(ls) - 1] == 0:
        break
print("最大值为{},这个数字出现了{}次".format(num_max, num_count))

验证:

Python练习_第1张图片 2.蒙特卡罗模拟

 代码:

import random

x_min, x_max = -1, 1
y_min, y_max = -1, 1
frequency = int(input("请输入次数:"))
i = 0
odd = 0
while i < frequency:
    x = random.uniform(x_min, x_max)
    y = random.uniform(y_min, y_max)
    if x < 0 or ((x + y < 1) and x > 0 and y > 0):
        odd += 1
    i += 1
probability = odd / frequency
print("落在奇数区域里的概率为{}".format(probability))

验证:

Python练习_第2张图片 3.显示21世纪(2001-2100)所有闰年,每行10个,以1个空格隔开

代码:

count = 0
for i in range(2001, 2101):
    if (i % 4 == 0 and i % 100 != 0) or i % 400 == 0:
        if count == 9:
            print(f"{i}")
            count = 0
        elif count < 9:
            print(f"{i}", end=" ")
            count += 1

验证:

Python练习_第3张图片 4. 反向显示一个整数

代码:

def reverse_num(nums):
    x = str(nums)
    j = ""
    for i in range(len(x)):
        j = x[i] + j
        i += 1
    return j


positive_num = int(input("请输入一个整数:"))
mun = reverse_num(positive_num)
print("这个整数反向输出为:{}".format(mun))

验证:

Python练习_第4张图片 5. 摄氏度与华氏度之间的转化

代码:

def celsius_to_fahrenheit(celsius):
    fahrenheit = (9 / 5) * celsius + 32
    return fahrenheit


def fahrenheit_to_celsius(fahrenheit):
    celsius = (5 / 9) * (fahrenheit - 32)
    return celsius


Celsius = float(input("请输入一个摄氏温度:"))
Fahrenheit = float(input("请输入一个华氏温度:"))
print("这个摄氏温度{}转化为华氏温度为{}".format(Celsius, celsius_to_fahrenheit(Celsius)))
print("这个华氏温度{}转化为摄氏温度为{}".format(Fahrenheit, fahrenheit_to_celsius(Fahrenheit)))

验证:

Python练习_第5张图片 6.数列求和

代码:

def sum_of_sequence(i):
    j = 0
    for x in range(1, i + 1):
        j = x / (x + 1) + j
        x += 1
    return j


nums = int(input("请输入一个正整数:"))
print("这个数列的和为{}".format(sum_of_sequence(nums)))

验证:

Python练习_第6张图片 7.输入三角形的三边长,有效计算面积,无效显示输入无效(两个函数)

代码:

import math


def isvalid(side1, side2, side3):
    if side1 + side2 > side3 and side2 + side3 > side1 and side1 + side3 > side2 and side1 - side2 < side3 and side2 - side3 < side1 and side1 - side3 < side2:
        area(side1, side2, side3)
    else:
        print("输入无效!!!")


def area(side1, side2, side3):
    p = (side1 + side2 + side3) / 2
    triangle_area = math.sqrt(p * (p - side1) * (p - side2) * (p - side3))
    print("三角形的面积为{}".format(triangle_area))


triangle_side1 = int(input("请输入第一条边长:"))
triangle_side2 = int(input("请输入第一条边长:"))
triangle_side3 = int(input("请输入第一条边长:"))
isvalid(triangle_side1, triangle_side2, triangle_side3)

验证:

有效输入:

Python练习_第7张图片 无效输入:

Python练习_第8张图片

8.梅森素数

代码:

def mersenne_prime(i):
    for count in range(1, i + 1):
        num = 2 ** count - 1
        if num > 1:
            flag = True
            for j in range(2, num // 2 + 1):
                if num % j == 0:
                    flag = False
                    break
            if flag:
                print("p({}) = {} 是梅森素数".format(count, num))


nums = int(input("请输入一个正整数:"))
mersenne_prime(nums)

验证:

Python练习_第9张图片

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