作业20181205

一，
import random
  2 '''
  3 定义一个字符串"python的创始人是Guido",试分别打印出"Guido"，"odiuG", "ph的人uo"
  4 '''
  5 a = 'python的创始人是Guido'
  6 print(a[-5:])
  7 print(a[-1:-6:-1])
  8 print(a[::3])
  9 '''
二， 
10 7.有字符串"你"和"最帅"，如何得到字符串"你最帅"，又如何得到字符串"你最帅最帅最帅"
 11 '''
 12 a = '你'
 13 b = '最帅'
 14 print(a+b)
 15 print(a+3*b)

三，
for i in range(10):
  3     a = random.randint(0,1000)
  4     b = []
  5     for i in range(3):
  6         b.append(a%10)
  7         a = a//10
  8     if b[0]==b[2] and b[2]!=0 and b[0]!= 0 or b[0]==b[1]and b[2]==0 and b[0]!=0:
  9         print(b[2]*100+b[1]*10+b[0])

四，
a = 300
  2 b = 15
  3 c = 9
  4 d = 1
  5 for i in range(0,20):
  6     for e in range(0,34):
  7         for f in range(0,300):
  8             if i * b + e * c + d * f ==300 and i + e + f == 100:
  9                 print('买大公鸡{}只，母鸡{}只，小鸡{}只'.format(i,e,f))

五，
a = input('请输入一个字符串：')
  2 b = 0
  3 c = 0
  4 for i in range(len(a)):
  5     if 65 <=ord(a[i]) <= 90 or 97 <= ord(a[i]) <= 122:
  6         b += 1
  7     else:
  8         c += 1
  9 print(b,c)

六，
a,b =eval(input('请输入年份月份：'))
  2 x = 0
  3 z = 0
  4 for i in range(1990,a):
  5 
  6 
  7     if i % 4 == 0 and i % 100 != 0 or i % 400 ==0:
  8         x += 366
  9     else:
 10         x += 365
 11 print(x)
 12 for i in range(1,b):
 13     if a % 4 == 0 and a % 100 != 0 or a % 400 ==0:
 14         if i in (1,3,5,7,8,10,12):
 15             d = 31
 16         elif i in  (4,6,9,11):
 17             d = 30
 18         else:
 19             d = 29
 20     else:
 21         if i in (1,3,5,7,8,10,12):
 22             d = 31
 23         elif i in (4,6,9,11):
 24             d = 30
 25         else:
 26             d = 28
 27     z = z+d
 28 print(z)
 29 y = x + z
 30 print(y)
 31 h = y % 7
 32 if h == 0:
 33     print('周一')
 34 elif h ==1:
 35     print('周二')
 36 elif h ==2:
 37     print('周三')
 38 elif h ==3:
 39     print('周四')
 40 elif h ==4:
 41     print('周五')
 42 elif h ==5:
 43     print('周六')
 44 elif h ==6:
 45     print('周日')