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  • lesson4_5
  • 1.py
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  • BellCodeEditor's avatar
    auto save · c2b8c542
    BellCodeEditor committed 11 months ago
    c2b8c542
1.py 1.14 KB
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# # 递归----解题的思路与方法
# # 递推----一步一步的去解决问题
# # 传递  回归   去   回 得出结果
# # 传递  推理 得出结果

# # 计算1-100之间所有数字之和
# # 1所有数字拿出来, 2累加
# # s=0
# # for i in range(1,101):
# #     s=s+i
# # if a==1:
# #     return 1
# # a=1
# # for i in range(9):
# #     a=(a+1)*2
# #     print(a)


# # def a(n):
# #     if n==10:
# #         return 1
# #     s=(a(n+1)+1)*2 
# #     return s
# # print(a(1))
# # def a(n):
# #     if n==1:
# #         return 1
# #     s=(a(n-1)+1)*2
# #     return s
# # print(a(10))
# # def s(n):
# #     if n==1 or n==2:
# #         return 1
# #     a=s(n-1)+s(n-2)
# #     return a
# # print(s(3))
# # 爬楼梯 每次1-2-3
# # 爬10楼有几种方法。2 4 6 10 16 26 
# # 111 12 21 3           
# # 地推
# def a(n):
#     if n==1:
#         return 1
#     if n==2:
#         return 2
#     s=a(n-1)+a(n-2)
#     return s
# print(a(30))


import turtle
a=turtle.Pen()
a.speed(0)


#基础图形 不规则正方形
for i in range(1,100):
    a.fd(i)
    a.left(91)


turtle.done()