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简单定义一个

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1 #!/usr/bin/env python3 2 P=3.14 3 def S(r): 4 return Pr*2 5 r=2 6 print ('s1=',S(r))

Tonight_dou

#2 Created at ... [Delete] [Delete and Lock User]

如果我没看错的话,return Pr*2,不应该半径×2,而是平方


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