python基础代码3

1判断三角形

a = int(input("请输入第一条边的长度:"))
b = int(input("请输入第二条边的长度:"))
c = int(input("请输入第三条边的长度:"))

def sanjiaoxing(a, b, c):
    if b + c <= a and a + b <= c and a + c <= b:
        print("0")
    else:
        if a == b == c:
            print("1")
        elif c * c + b * b == a * a or a * a + b * b == c * c or c * c + a * a == b * b:
            print("3")
        elif a == b or b == c:
            print("2")
        else:
            print("4")

sanjiaoxing(a, b, c)

2.角谷定理

# 输入一个自然数，若为偶数，则把它除以2，
# 若为奇数，则把它乘以3加1。
# 经过如此有限次运算后，总可以得到自然数值1
# 。求经过多少次可得到自然数1。

def jiaogu(n):
    a = []
    count = 0
    while n != 1:

        if n % 2 == 0:
            n = n / 2
            a.append(n)
            count += 1
        else:
            n = n * 3 + 1
            a.append(n)
            count += 1
    print(count)
    print(a)


n = int(input('请输入一个正整数：'))
if n <= 0:
    print('输入错误')
jiaogu(n)

.3.随机生成成绩-判断等级并求最高分最低分

# 开发者：林*
# 开发时间：2022/10/14 8:14

import random


def get_level(score):
    if 90 < score <= 100:
        return '优秀'

    elif 80 < score <= 90:
        return '良好'

    elif 70 < score <= 80:
        return '中等'

    elif 60 < score <= 70:
        return '及格'
    else:
        return '不及格'


MInScore = 101
MaxScore = 0
for i in range(20):
    score = random.randint(0, 100)
    level = get_level(score)
    MaxScore = max(MaxScore,score)
    MInScore = min(MInScore,score)
    print("成绩: %s, 等级: %s" % (score, level))

print("最高分%d" % MaxScore)
print("最低分%d" % MInScore)

4.奇数在前偶数在后

# 开发者：林*
# 开发时间：2022/10/14 9:09
def reorder_odd_event(arry):
    if len(arry) < 2:
        return arry
    begin, end = 0, len(arry) - 1
    while begin < end:
        if arry[begin] % 2 == 1:
            begin += 1
        if arry[end] % 2 == 0:
            end -= 1
        if arry[begin] % 2 == 0 and arry[end] % 2 == 1:
            arry[begin], arry[end] = arry[end], arry[begin]
            begin += 1
            end -= 1
    return arry