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作业

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# -*- coding: utf-8 -*-height = float(input('请输入您的身高:'))
weight = float(input('请输入您的体重:'))
rs = height/(weight**2)
if rs < 18.5:
    print('%f%s' % (rs, '过轻!'))
elif rs <= 18.5:
    print('%f%s' % (rs, '正常!'))
elif rs <= 25:
    print('%f%s' % (rs, '过重!'))
elif rs <= 28:
    print('%f%s' % (rs, '肥胖!'))
else:
    print('%f%s' % (rs, '严重肥胖!'))

干脆

def Pbmi(float,str):
    print('%f%s' % (float,str))

然后 

if rs < 18.5:
    Pbmi(rs, '过轻!')


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