height = float(input('请输入身高(m):')) 请输入身高(m):1.75 weight = float(input('请输入体重(kg):')) 请输入体重(kg):80.5 bmi = weight/(height*height) print('bmi=%.1f'%bmi) bmi=26.3 if bmi < 18.5: ... print('过轻') ... elif bmi < 25: ... print('正常') ... elif bmi < 28: ... print('过重') ... elif bmi < 32: ... print('肥胖') ... else: ... print('严重肥胖') ... 过重