Python第一周习题集（二）

#比较大小
#方法1
from math import max
a = ('请输入第一个整数：')
b = ('请输入第二个整数：')
c = ('请输入第三个整数：')
d = max(a, b, c)
print('其中最大的是%f：' %d)

#如何交换两个变量值   a, b = b, a
'''
temp = a
a = b 
b = temp
'''
a = int(input('a ='))
b = int(input('b ='))
c = int(input('c ='))
'''
if a > b:
    a, b = b, a
if b > c:
    b, c = c, b
if a > b:
    a, b = b, a
print(a, b , c)'''
(a, b) = a > b and (b, a) or (a, b)
(b, c) = b > c and (c, b) or (b, c)
(a, b) = a > b and (b, a) or (a, b)
print(a, b, c)

#判断一个数是否是质数
a = int(input('请输入一个数:'))
is_prime = True
for b in range(2, a):
    c = a % b 
    if c == 0:
        is_prime = False
        break
if is_prime:
    print('%d他是质数!' % a)
else:
    print('%d他不是质数' % a)

#九九乘法表
for row in range(1, 10):
    for col in range(1, row + 1):
        print('%d*%d=%d' % (row, col, row * col), end='\t')#制表符
    print()#换行用,

#百元百鸡，公鸡5元一只，母鸡3元一只，小鸡一元3只，问有一百元，买一百只鸡，有几种买法

for x in range(21):
    for y in range(34):
        #for z in range(0, 100, 3):
        z = 100 - x - y
        if  5 * x + 3 * y + z // 3 == 100 and z % 3 == 0:
            print(x, y ,z)

print(0.1 + 0.2 + 0.3)
print(0.3 + 0.2 + 0.1)
#由于浮点数表示法的问题,
#在实际开发的过程中请不要做浮点数的==和!=运算.
#实在要用,一定要先转换成int再计算,算完再转换回去.

#找出 1000 以内的水仙花数。
from math import pow
for num in range(1000):
    a = num // 100 
    b = num // 10 % 10
    c = num % 10
    if num == pow(a, 3) + pow(b, 3) + pow(c, 3):
        print('%f是水仙花数！' %num)

#完美数
from math import sqrt
for num in range(10000):
    sum = 0
    for i in range(2, int(sqrt(num)) + 1):
        if num % i == 0:
            sum +=i
            if i != num // i:
                sum += num // i
        if num == sun + 1:
            print('%d是完美数' %num)

#经典的Craps赌博游戏
from random import randint

go_on = False
num1 = randint(1, 6)
num2 = randint(1, 6)
total1 = num1 + num2
print('玩家摇出了%d' % total1)
if total1 == 7 or total1 == 11:
    print('玩家胜')
elif total1 == 2 or total1 == 3 or total1 == 12:
    print('玩家输')
else:
    go_on = True
while go_on:
    num1 = randint(1, 6)
    num2 = randint(1, 6)
    total2 = num1 + num2
    print('玩家摇出了%d' % total2)
    if total2 == total1:
        print('玩家胜!')
        go_on = False
    elif total2 == 7:
        print('玩家输!')
        go_on = False

#经典的五人分鱼问题
fish = 1
while True:
    totle = fish
    is_enough = True
    for _ in range(5):
        if (total - 1) % 5 == 0:
            total = (total - 1) // 5 * 4
        else:
            break
            is_enough = False
    if is_enough:
        print(fish)
        break
    fish += 1