Python练习笔记——计算个人体重指数

输入您的身高　体重　性别　
计算出你的体重是否标准

gender = input('请输入您的性别(boy or girl):')
height = input('请输入您的身高（单位cm）:')
height = float(height)
weight = input('请输入您的体重（单位kg）:')
weight = float(weight)

if gender == 'boy':
    print('您的性别：男')
    standard = (height - 100)*0.9
    if standard*1.5 < weight:
        print('重度肥胖！！！请您加强锻炼．')
    elif standard*1.3 < weight:
        print('中度肥胖！！！')
    elif standard*1.2 < weight:
        print('轻度肥胖！！！')
    elif standard*1.1 < weight:
        print('超重！！！')
    elif standard*0.9 < weight:
        print('恭喜您，体重正常！')
    else :
        print('您体重过低，请加强营养和锻炼！')

elif gender == 'girl':
    print('您的性别：女')
    standard = (height - 100)*0.9 - 2.5
    if standard*1.5 < weight:
        print('重度肥胖！！！请您加强锻炼．')
    elif standard*1.3 < weight:
        print('中度肥胖！！！')
    elif standard*1.2 < weight:
        print('轻度肥胖！！！')
    elif standard*1.1 < weight:
        print('超重！！！')
    elif standard*0.9 < weight:
        print('恭喜您，体重正常！')
    else :
        print('您体重过低，请加强营养和锻炼！')

采用if-elif-else比采用两个if语句运行要快