class Sieve(Item):
def out(self):
n = self.source.out()
self.source=Filter(self.source,n)
return n
def __init__(self,src):
self.source = src
class Counter:
def __init__(self,v):
self.value = v
def out(self):
v = self.value
self.value+=1
return v
class Filter:
def out(self):
while(True):
n = self.source.out()
if n % self.factor != 0:
return n
def __init__(self, src, f):
self.source = src
self.factor = f
c = Counter(2)
s = Sieve(c)
n = input('输入数字')
n = int(n)
while(True):
nextt = s.out()
if(nextt>n):
break
print(str(nextt)+' ')
面向对象思维编程
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转载自blog.csdn.net/aaalswaaa1/article/details/88993265
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