python20181205

6.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"

n = "python的创始人是Guido"
print(n[11:16])
print(n[-1:-6:-1])
print(n[::3])

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" 

m = "你"
n = "最帅"
print(m+n)
print(m+n*3)

2. 像121 11 111等对称的整型数称为回文整型数,随机产生1000以内的10个整型数，打印其中的回文整型数

from random import*
for i in range (10):
    m=randint(0,1001)
    n=str(m)
    if n == n[::-1]:
        print(n)

4. 公鸡5文钱1只，母鸡3文钱1只，小鸡3只1文钱，用100文钱买100只鸡，可以怎么买？

for i in range(100):
    for j in range(100):
        for z in range(100):
            if 5*i+3*j+z/3 == 100:
                if i+j+z==100:
                    print("{}个公鸡,{}个母鸡,{}小鸡".format(i,j,z))

5. 使用input()读入一个字符串，统计字符串中字母的个数，和数字的个数

s = input("请输入一个字符串:")
cnt = 0
num = 0
for i in s:
    if "A" <= i <= "z":
        cnt += 1
    elif "0" <= i <= "9":
        num += 1
print("字母的个数{},数字的个数{}".format(cnt,num))

已知1990.1.1是星期一，用户输入一个1990后的任意年月，计算其1号星期几

year = int(input("请输入一个年份:"))
month = int(input("请输入一个月份:"))
day = int(input("请输入一个日期:"))
l = 0
m = year - 1990
for i in range (1990,year):
    if i % 4 ==0 and i % 100 != 0 or i % 400 ==0:
        l += 1
d = 365 * (m - l) + 366 * l
if year % 4 ==0 and year % 100 != 0 or year % 400 ==0:
    da = [31,29,31,30,31,30,31,31,30,31,30,31]
else:
    da = [31,28,31,30,31,30,31,31,30,31,30,31]
days = 0
for i in range(1,13):
    if i == month:
        for j in range(i-1):
            days +=da[j]
n = days + day
t = (d + n) % 7
if t == 1:
    print("1号是星期一")
elif t == 2:
    print("1号是星期二")
elif t == 3:
    print("1号是星期三")
elif t == 4:
    print("1号是星期四")
elif t == 5:
    print("1号是星期五")
elif t == 6:
    print("1号是星期六")
else:
    print("1号是星期日")