def area_circle(r):
if r>0:
return(3.14*r*r)
else:
return 0
R=[2.2,3,5,6,-9]
for r in R:
s=area_circle(r)
print('%.1f为半径时，它的面积为%.2f' % (r,s))
print('结束')
请教老哥如何能够看到作业，谢谢了
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用户6291432270
def area_circle(r):
if r>0:
return(3.14*r*r)
else:
return 0
R=[2.2,3,5,6,-9]
for r in R:
s=area_circle(r)
print('%.1f为半径时，它的面积为%.2f' % (r,s))
print('结束')